Wire cutting threading transition guide device and wire cutting lower machine head

Abstract

The utility model discloses a wire cutting threading transition guide device and a wire cutting lower machine head, and belongs to the technical field of electrode wire cutting equipment. The wire cutting threading transition guide device comprises two wheel seats, a guide wheel and a turning block, the wheel seats and the turning block are installed on a lower machine head, the guide wheel is installed on the two wheel seats, the close ends of the two wheel seats are arranged on the guide wheel in a sleeved mode, the turning block is connected with the close ends of the two wheel seats, and a turning channel is defined by the turning block, the wheel seats and the guide wheel. According to the utility model, the turning block, the wheel seat and the guide wheel are connected to define the laterally closed turning channel, so that the periphery of an electrode wire can be limited during threading, the threading success rate is greatly improved, and the problem of high threading failure rate caused by large lateral gap between the turning block and the guide wheel in the prior art is solved.

Description

Technical Field

[0001] The utility model belongs to the field of wire electrode cutting equipment, specifically a wire cutting wire threading transition guiding device and a lower head of a wire cutting machine. Background Art

[0002] In paragraph 43 of the Chinese invention patent with publication date: February 13, 2024, publication number: CN 117548758 A, and invention title: A reciprocating wire electrode cutting equipment and its using method, it is disclosed that "It further includes a wire guiding component 7 for guiding the wire electrode passing through the restricting component 6 to the position where the wire winding cylinder 2 is located. The wire guiding component 7 includes: a deflecting block 71, the deflecting block 71 is fixed on the wire guiding support frame 33 by screws, is arranged below the second restricting block 62 and abuts against the second restricting block 62. A deflecting channel 11 is formed in the deflecting block 71 for receiving the wire electrode moved out from the wire guiding component and changing the moving direction of the wire electrode so that it moves towards the direction where the wire winding cylinder 2 is located. The deflecting channel 11 is communicated with the second restricting channel 67, and the second restricting channel 67 is provided with an arc-shaped bending part to make the passing of the wire electrode smoother; a wire guiding tube 72, the wire guiding tube 72 is slidably assembled on the wire guiding support frame 33 through a slide rail and abuts against the deflecting block 71 when sliding to one end, and then is communicated with the deflecting channel 11. When the wire guiding tube 72 moves to the end far from the deflecting block 71, it reaches the position where the wire winding cylinder 2 is located. A second driving device 73 for driving the wire guiding tube 72 to reciprocally slide is arranged on the wire guiding support frame 33. In this embodiment, the second driving device 73 is set as a lead screw mechanism driven by a servo motor."

[0003] In its actual application, the part of the deflecting block close to the guiding wheel is a cantilever structure, and there is a problem that the lateral gap between the deflecting block and the guiding wheel is relatively large, resulting in a high wire threading failure rate. Summary of the Utility Model

[0004] Utility Model Purpose: To provide a wire cutting wire threading transition guiding device and a lower head of a wire cutting machine, which enclose a laterally closed deflecting channel through the connection of a deflecting block, a wheel seat and a guiding wheel, and solve the problem in the prior art that the lateral gap between the deflecting block and the guiding wheel is relatively large, resulting in a high wire threading failure rate.

[0005] The technical solution of the utility model is as follows: In the first aspect, a wire cutting wire threading transition guiding device is installed on the lower head of a wire cutting machine.

[0006] The wire cutting wire threading transition guiding device includes: two wheel seats, a guiding wheel and a deflecting block.

[0007] The wheel seats and the deflecting block are installed on the lower head, and the guiding wheel is installed on the two wheel seats.

[0008] The proximal ends of the two wheel seats are sleeved on the guide wheel, and the changing block is connected to the proximal ends of the two wheel seats, so that the changing block, the wheel seat and the guide wheel enclose a changing channel.

[0009] In a further embodiment of the first aspect, groove portions are provided at adjacent ends of the two wheel seats.

[0010] The turning block is provided with two protrusions, and the groove portion and the protrusion are matched with each other in a concave-convex manner, so that the wheel seat and the turning block support each other laterally.

[0011] In a further embodiment of the first aspect, the cross-sectional shape formed by the two protrusions and the side wall of the turning block is a "C" shape, a "V" shape, a "U" shape, or a "凵" shape structure.

[0012] In a further embodiment of the first aspect, the guide wheel is provided with an annular groove, the width of the annular groove being ≤ the distance between the adjacent ends of the two wheel seats, thereby avoiding the contact probability between the electrode wire and the wheel seat.

[0013] In a further embodiment of the first aspect, the cross-sectional shape of the annular groove is a "C" shape, a "V" shape, a "U" shape, or a "凵" shape.

[0014] In a further embodiment of the first aspect, the gap size between the inner walls of the adjacent ends of the two wheel seats and the outer wall of the guide wheel is smaller than a predetermined value.

[0015] In a further embodiment of the first aspect, the wire-cutting wire-threading transition guide device further includes: a bearing, and the guide wheel is mounted on the wheel seat through the bearing.

[0016] In a further embodiment of the first aspect, the side wall of the wheel seat is further provided with a plurality of through holes.

[0017] In a further embodiment of the first aspect, the through holes are equally divided around the circumference of the central axis of the wheel seat.

[0018] In the second aspect, the wire cutting lower head includes: a wire threading base, and the wire cutting wire threading transition guide device described in the first aspect.

[0019] The wheel seat and the direction-changing block of the wire-cut wire-threading transition guide device are installed on the wire-threading base.

[0020] The beneficial effects of the present utility model are as follows: In this application, the steering block is connected to the adjacent ends of the two wheel seats, so that there is a structural support between the steering block and the guide wheel. The steering block, the wheel seat and the guide wheel are connected to enclose a laterally closed steering channel. The inlet end of the steering channel is connected to the inlet end of the lower headstock, and the outlet end of the steering channel is connected to the outlet end of the lower headstock. It can limit the four sides of the electrode wire during wire threading, greatly improving the wire threading success rate and solving the problem of high wire threading failure rate caused by the large lateral gap between the steering block and the guide wheel in the prior art. Description of the Drawings

[0021] Figure 1 is an exploded schematic view of the wire threading transition guide device of the present utility model.

[0022] Figure 2 is an assembled axonometric schematic view of the wire threading transition guide device of the present utility model.

[0023] Figure 3 is a sectional schematic view of the wire threading transition guide device of the present utility model.

[0024] Figure 4 is an assembled axonometric schematic view of the wire cutting lower headstock using the wire threading transition guide device of the present utility model.

[0025] The reference numerals shown in the figure are: wheel seat 1, groove portion 101, through hole 102, guide wheel 2, annular groove 201, steering block 3, convex portion 301, bearing 4, wire threading base 5. Detailed Embodiments

[0026] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0027] This application discloses a wire cutting wire threading transition guide device and a wire cutting lower headstock. The wire cutting wire threading transition guide device is installed on the lower headstock of a wire cutting machine tool, and the wire cutting lower headstock is installed in the wire cutting machine tool. A laterally closed steering channel is enclosed by connecting the steering block, the wheel seat and the guide wheel, solving the problem of high wire threading failure rate caused by the large lateral gap between the steering block and the guide wheel in the prior art.

[0028] First aspect, as Figure 1 shown, the wire cutting wire threading transition guide device includes: two wheel seats 1, a guide wheel 2 and a steering block 3.

[0029] The wheel seat 1 and the steering block 3 are installed on the lower headstock, and the guide wheel 2 is installed on the two wheel seats 1.

[0030] The proximal ends of the two wheel seats 1 are sleeved on the guide wheel 2, and the changing block 3 is connected to the proximal ends of the two wheel seats 1, so that the changing block 3, the wheel seat 1 and the guide wheel 2 enclose a changing channel, which is an arc-shaped channel arranged around the guide wheel 2.

[0031] Regarding the cooperation between the wheel seat 1 and the turning block 3, Figure 2 The adjacent ends of the two wheel seats 1 are provided with groove portions 101 .

[0032] The direction-changing block 3 is provided with two protrusions 301 , and the groove 101 and the protrusions 301 are matched with each other in a concave-convex manner.

[0033] The wheel seat 1 and the steering block 3 support each other laterally through the concave-convex fit, further improving the structural stability and positioning accuracy during assembly.

[0034] In this embodiment, the cross-sectional shape formed by the two protrusions 301 and the side wall of the turning block 3 is a "C" shape, a "V" shape, a "U" shape, or a "凵" shape structure. Figure 3 The cross-sectional shape formed by the two protrusions 301 and the side wall of the direction-changing block 3 is a "U"-shaped structure.

[0035] Regarding the cooperation between the wheel seat 1 and the guide wheel 2, Figures 1 - 3 The guide wheel 2 shown is provided with an annular groove 201 , and the width of the annular groove 201 is ≤ the distance between the adjacent ends of the two wheel seats 1 .

[0036] The annular groove 201 can confine the wire electrode in the guide wheel 2 during operation, thereby avoiding the possibility of the wire electrode contacting the wheel seat 1 .

[0037] In this embodiment, the cross-sectional shape of the annular groove 201 is a "C" shape, a "V" shape, a "U" shape, or a "凵" shape. Figure 3 The cross-sectional shape of the annular groove 201 is a “V”-shaped structure.

[0038] In this embodiment, the gap size between the inner walls of the adjacent ends of the two wheel seats 1 and the outer wall of the guide wheel 2 is smaller than a predetermined value. The predetermined value can be set according to the diameter of the electrode wire. The existing electrode wire diameter is generally between 0.1-0.3mm, so the gap size between the inner walls of the adjacent ends of the two wheel seats 1 and the outer wall of the guide wheel 2 can be made ≤0.1mm.

[0039] The wire threading success rate can be further improved by making the gap size smaller than the diameter of the electrode wire.

[0040] like Figure 1 The wire-cut wire-threading transition guide device shown further includes: a bearing 4 , and the guide wheel 2 is mounted on the wheel seat 1 via the bearing 4 .

[0041] The guide wheel 2 extends with rotating shafts at both ends, as Figure 3 shown, a thrust ball bearing and a deep groove ball bearing are respectively installed at both ends of the guide wheel 2.

[0042] As Figure 1 and 2 shown, several through holes 102 are further provided on the side wall of the wheel seat 1, and the through holes 102 are arranged in a circumferential equal division around the central axis of the wheel seat 1.

[0043] In a second aspect, the lower head of the wire cutting machine tool includes: a wire threading base 5, and the wire cutting wire threading transition guiding device described in the first aspect.

[0044] The wheel seat 1 and the deflector block 3 of the wire cutting wire threading transition guiding device are installed on the wire threading base 5.

[0045] The lower head is installed below the upper head of the wire cutting machine tool. The upper head is provided with a wire feeding device. The top end of the wire threading base 5 is provided with a wire feeding-in device, and one side is provided with a wire feeding-out device. The wire feeding-in device is arranged below the wire feeding device, and the deflector channel communicates the wire feeding-in device and the wire feeding-out device.

[0046] Working method: The electrode wire is molybdenum wire or copper wire. During the process of the wire feeding device feeding the electrode wire, the electrode wire sequentially passes through the wire feeding-in device of the wire threading base 5, the deflector channel of the transition guiding device, and the wire feeding-out device of the wire threading base 5. When the electrode wire passes through the deflector channel of the transition guiding device, a laterally closed deflector channel is enclosed by the connection of the deflector block 3, the wheel seat 1 and the guide wheel 2, which can limit the four sides of the electrode wire during wire threading, greatly improving the wire threading success rate.

[0047] When wire cutting work is carried out using the electrode wire, the electrode wire is pulled in, so that a part of the electrode wire in the deflector channel enters into the annular groove 201 of the guide wheel 2. During the movement of the electrode wire, the guide wheel 2 rotates accordingly, reducing the wear between the electrode wire and the guide wheel 2.

[0048] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as a limitation to the present invention itself. Various changes can be made in its form and details without departing from the spirit and scope of the present invention defined by the appended claims.

Claims

1. Wire cutting wire transition guide device, which is installed on the lower head of the wire cutting machine; It is characterized in that The wire-cut wire-threading transition guide device includes: two wheel seats, a guide wheel and a direction-changing block; The wheel seat and the direction-changing block are installed on the lower nose, and the guide wheels are installed on the two wheel seats; The proximal ends of the two wheel seats are sleeved on the guide wheel, and the changing block is connected to the proximal ends of the two wheel seats, so that the changing block, the wheel seat and the guide wheel enclose a changing channel.

2. The wire-cutting wire threading transition guiding device according to claim 1, wherein The adjacent ends of the two wheel seats are provided with groove portions; The direction-changing block is provided with two raised portions, and the groove portion and the raised portion are matched in a concave-convex manner.

3. The wire-cutting wire threading transition guiding device according to claim 2, wherein, The cross-sectional shape formed by the two protrusions and the side wall of the direction-changing block is a "C" shape, a "V" shape, a "U" shape, or a "凵" shape structure.

4. The wire cutting wire threading transition guiding device according to claim 1, characterized in that, The guide wheel is provided with an annular groove, and the width dimension of the annular groove is ≤ the distance dimension between the adjacent ends of the two wheel seats.

5. The wire cutting wire threading transition guiding device according to claim 4, characterized in that, The cross-sectional shape of the annular groove is a "C" shape, a "V" shape, a "U" shape, or a "凵" shape.

6. The wire-cutting wire threading transition guiding device according to claim 1, characterized in that, The gap size between the inner walls of the adjacent ends of the two wheel seats and the outer wall of the guide wheel is smaller than a predetermined value.

7. The wire-cutting wire threading transition guiding device according to claim 1, wherein, Also includes: Bearing, the guide wheel is installed on the wheel seat through the bearing.

8. The wire cutting wire threading transition guiding device according to claim 1, wherein The side wall of the wheel seat is also provided with a plurality of through holes.

9. The wire-cutting wire threading transition guiding device according to claim 8, wherein, The through holes are equally divided around the circumference of the central axis of the wheel seat.

10. Wire-cut lower machine head, characterized in that, include: A wire threading base and a wire cutting wire threading transition guide device according to any one of claims 1 to 9; The wheel seat and the direction-changing block of the wire-cut wire-threading transition guide device are installed on the wire-threading base.

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