Non-perforation wire cutting machining process

Abstract

The application relates to the technical field of wire cutting, in particular to a perforation-free wire cutting machining process, the walking track of an electrode wire is preset, and a plate is cut according to the preset walking track; the walking track comprises an entering track and a cutting track; the starting point of the entering track falls on one side of the plate, and the ending point is connected with the cutting track; the entering track can divide the plate into adjacent first and second plate blocks; the adjacent surfaces of the first and second plate blocks form interlocking convex blocks and concave grooves; the convex blocks and the concave grooves have shapes complementary to each other and are interlocked; the plate deformation can be avoided under the premise of no perforation, so that the machining precision of the workpiece is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire cutting machining, and in particular to a perforation-free wire cutting machining process. BACKGROUND

[0002] Wire cutting machining is machining of a part by means of discharge of electric sparks. The workpiece is connected to the positive pole of a pulse power supply, and molybdenum wire or copper wire is used as a cutting electrode wire, which is connected to the negative pole of a high-frequency pulse power supply as a tool electrode, and the machining part is cut by means of spark discharge. During the cutting process, especially when cutting a relatively precise workpiece, a wire cutting hole is pre-drilled by a drilling machine at an edge position inside a piece of plate to be machined (i.e. a blank), the electrode wire of the wire cutting is then passed through the wire cutting hole for discharge machining, and closed cutting is performed to avoid deformation of the plate to the opening side during the cutting process, so as to ensure the shape precision of the workpiece. Although the above method solves the problem of plate deformation, it undoubtedly increases the cost of the hole drilling process and the turnover cost of the product between different processes. SUMMARY

[0003] The present application aims to provide a perforation-free wire cutting machining process, which can ensure the machining precision of wire cutting without drilling holes and improve the wire cutting efficiency.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] The perforation-free wire cutting machining process pre-sets a walking track of an electrode wire, and cuts a plate according to the pre-set walking track, the walking track includes an entering track and a cutting track, the starting point of the entering track falls on one side of the plate, and the ending point is connected to the cutting track, the entering track can divide the plate into adjacent first and second plate blocks, the adjacent surfaces of the first and second plate blocks form interlocking protrusions and grooves, the protrusions and the grooves have complementary shapes to each other, and are interlocked with each other.

[0006] Optionally, the walking track includes one entering track and a plurality of cutting tracks, and the cutting tracks are connected to each other.

[0007] Optionally, the starting point of the entering track is arranged on the side of the plate closest to the cutting track.

[0008] Optionally, the protrusions and the grooves form an interlocking structure of the first and second plate blocks in the X and Y directions, the X and Y directions are perpendicular to each other, and the X direction refers to the extension direction of the adjacent surfaces of the first and second plate blocks.

[0009] Optionally, the entering trajectory starts from a point on one side of the plate, and comprises a plurality of line segments connected in sequence, each of the line segments extends along the X direction or the Y direction, and adjacent line segments are perpendicular to each other.

[0010] Optionally, the length of the shortest line segment in the line segment constituting the groove or the protrusion is between 4 mm and 6 mm, and the length of the longest line segment is between 8 mm and 12 mm.

[0011] Optionally, the groove is an L-shaped groove, and the length of the groove opening of the L-shaped groove is less than the length of the groove bottom.

[0012] Optionally, assuming that the starting segment and the ending segment of the entering trajectory are k0 and k1 respectively, and the line segment cutting the groove or the protrusion is a1, b1, a2, b2, a3 connected in sequence, wherein a1, a2, and a3 extend along the Y direction, k0, k1, b1, and b2 extend along the X direction, the starting point of k0 is located on one side of the plate, the starting point of a1 is connected with the ending point of k0, the ending point of a3 is connected with the starting point of k1, the ending point of k1 is connected with the starting point of the cutting trajectory, the length of a1 is less than the length of a3, and the distance between the starting point of a1 and the ending point of a3 is less than the length of b1.

[0013] Optionally, the groove is a rectangular groove, the first plate or the second plate simultaneously comprises the groove and the protrusion, and the protrusion blocks the opening part of the groove.

[0014] Optionally, assuming that the starting segment and the ending segment of the entering trajectory are k0 and k1 respectively, and the line segment cutting the groove and the protrusion is a1, b1, a2, b2, a3, b3, a4 connected in sequence, wherein a1, a2, a3, and a4 extend along the Y direction, k0, k1, b1, b2, and b3 extend along the X direction, the starting point of a1 is connected with the ending point of k0, the ending point of a4 is connected with the starting point of k1, the length of b2 is less than the length of b3, and the length of a3 is the same as the length of a4.

[0015] The beneficial effect of the present application is that the interlocking protrusion and groove are formed on the adjacent first plate and second plate by adjusting the entering trajectory, the cost and turnover cost of the punching hole process are eliminated, and the processing efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the schematic diagram of the electrode wire walking trajectory according to the embodiment of the present application;

[0017] Figure 2 is the schematic diagram of the entering trajectory in one embodiment of the present application;

[0018] Figure 3 is the schematic diagram of the entering trajectory in another embodiment of the present application.

[0019] Fig. 1, plate; 2, workpiece; 3, entry trajectory; 4, cutting trajectory. DETAILED DESCRIPTION

[0020] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that, for the purpose of description, only the parts related to the application are shown in the drawings rather than all the parts.

[0021] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0022] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0023] In the description of the present embodiment, the terms "upper", "lower", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0024] The present embodiment proposes a non-perforated wire cutting machining process, mainly applied in the field of wire cutting machining, and particularly suitable for cutting workpieces from plate materials. By adjusting the running trajectory of the electrode wire during wire cutting, the deformation of the plate material is reduced under the premise of avoiding punching, thereby reducing the cutting cost and improving the cutting efficiency.

[0025] Referring to 1-3, a kind of piercing-free wire cutting machining process, the running track of electrode wire is preset, then according to the running track of preset, plate is cut, the running track of preset includes entry trajectory and cutting trajectory, cutting trajectory is closed curve, consistent or approximate with the shape of the outer contour of workpiece, electrode wire can be cut from plate along cutting trajectory, entry trajectory is the running track of electrode wire cutting into plate, its starting point falls on one side of plate, electrode wire separates plate into adjacent first plate and second plate along entry trajectory, the adjacent surface of first plate and second plate forms interlocking protrusion and recess, protrusion and recess have complementary shape with each other, and interlock each other to form interlocking.

[0026] Through interlocking protrusion and recess, two adjacent side surfaces separated are interlocked, prevent adjacent side surface from deforming when electrode wire runs along cutting trajectory, eliminate the perforating process, improve the efficiency of wire cutting.

[0027] Protrusion can be formed on the first plate, recess can also be formed, and both protrusion and recess can also be formed, and the second plate can also be set complementarily with the first plate.

[0028] Multiple workpieces can be cut on a plate, i.e., the running track can include an entry trajectory and multiple cutting trajectories, adjacent cutting trajectories are connected to each other to reduce the amount of plate and cost, and generally, the plate is rectangular structure.

[0029] Optionally, the starting point of entry trajectory can be set on the edge of plate closest to cutting trajectory to reduce the running time of electrode wire and further improve the efficiency of wire cutting.

[0030] Referring to Figures 2-3 As shown, interlocking in X direction and interlocking in Y direction are needed between first plate and second plate to ensure the stability of interlocking, wherein X direction refers to the extension direction of adjacent surface of first plate and second plate, and Y direction is perpendicular to X direction, for example, protrusion and recess can be dovetail shape. To reduce the difficulty of presetting entry trajectory, entry trajectory takes a point on one edge of plate as starting point, and includes multiple line segments connected in sequence, each line segment extends along X direction or Y direction, and adjacent line segments are perpendicular to each other.

[0031] Optionally, as Figure 2As shown, the groove can be provided as an L-shaped slot, and the length of the slot opening is less than the length of the slot bottom, and correspondingly, the protrusion is also L-shaped, and interlocking the first plate and the second plate in the X direction and the Y direction respectively. Assuming that the starting section and the ending section of the entering knife track are k0 and k1 respectively, and the line segments for cutting the groove or the protrusion are a1, b1, a2, b2, a3 connected in sequence, wherein a1, a2, a3 extend along the Y direction, k0, k1, b1, b2 extend along the X direction, the starting point of k0 is located on one edge of the plate, the starting point of a1 is connected with the ending point of k0, the ending point of a3 is connected with the starting point of k1, the ending point of k1 is connected with the starting point of the cutting track, the length of a1 is less than the length of a3, and the distance between the starting point of a1 and the ending point of a3 is less than the length of b1, at this time, the L-shaped slot bends to the k0 direction.

[0032] It can be understood that the length of a1 can also be greater than the length of a3, and at this time, the groove bends to the k1 direction.

[0033] The groove can also be provided as a rectangular slot, and at this time, the first plate or the second plate includes both the groove and the protrusion, and the protrusion partially blocks the opening of the groove, so that the length of the slot opening is less than the length of the slot bottom. For example, assuming that the starting section and the ending section of the entering knife track are k0 and k1 respectively, and the line segments for cutting the groove and the protrusion are a1, b1, a2, b2, a3, b3, a4 connected in sequence, wherein a1, a2, a3, a4 extend along the Y direction, k0, k1, b1, b2, b3 extend along the X direction, the starting point of k0 is located on one edge of the plate, the starting point of a1 is connected with the ending point of k0, the ending point of a4 is connected with the starting point of k1, the ending point of k1 is connected with the starting point of the cutting track, the length of b2 is less than the length of b3, and the lengths of a3 and a4 are the same, at this time, the protrusion is rectangular, and the size of the protrusion can be consistent with the size of the groove.

[0034] It can be understood that when the length of a3 is greater than the length of a4, the protrusion is L-shaped.

[0035] The length of the shortest line segment among the line segments constituting the groove or the protrusion is between 4mm-6mm, and the length of the longest line segment is between 8mm-12mm, which can not only ensure the strength of the interlocking structure, but also avoid the entering knife track being too long and reduce the wire cutting efficiency.

[0036] Obviously, the above embodiments of the present application are only examples for clear illustration of the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A non-perforated wire cutting process, wherein the travel trajectory of the electrode wire is preset, and the plate (1) is cut according to the preset travel trajectory, characterized in that: The travel trajectory includes an entry trajectory (3) and a cutting trajectory (4). The entry trajectory (3) starts on one side of the plate (1) and ends at the cutting trajectory (4). The entry trajectory (3) can divide the plate (1) into adjacent first and second plates. The adjacent surfaces of the first and second plates form interlocking protrusions and grooves. The protrusions and grooves have complementary shapes and interlock with each other. The travel trajectory includes one cutting trajectory (3) and multiple cutting trajectories (4), which are interconnected. The starting point of the cutting trajectory (3) is set on the side of the plate (1) closest to the cutting trajectory (4).

2. The non-perforated wire EDM process according to claim 1, characterized in that, The protrusion and the groove form an interlocking structure between the first plate and the second plate in the X and Y directions. The X and Y directions are perpendicular to each other, and the X direction refers to the extension direction of the adjacent surfaces of the first plate and the second plate.

3. The non-perforated wire EDM process according to claim 2, characterized in that, The cutting trajectory (3) starts from a point on one side of the plate (1) and includes multiple line segments connected in sequence. Each line segment extends along the X or Y direction and adjacent line segments are perpendicular to each other.

4. The non-perforated wire EDM process according to claim 3, characterized in that, The shortest line segment that makes up the groove or bump is between 4mm and 6mm long, and the longest line segment is between 8mm and 12mm long.

5. The non-perforated wire EDM process according to claim 2, characterized in that, The groove is an L-shaped groove, and the length of the groove opening is less than the length of the groove bottom.

6. The non-perforated wire EDM process according to claim 5, characterized in that, Assuming the starting and ending segments of the cutting trajectory (3) are k0 and k1 respectively, the line segments that cut out the groove or protrusion are a1, b1, a2, b2, a3 connected end to end in sequence, where a1, a2, a3 all extend along the Y direction, and k0, k1, b1, b2 all extend along the X direction. The starting point of k0 is located on one of the edges of the plate (1), the starting point of a1 is connected to the ending point of k0, the ending point of a3 is connected to the starting point of k1, the ending point of k1 is connected to the starting point of the cutting trajectory (4), the length of a1 is less than the length of a3, and the distance between the starting point of a1 and the ending point of a3 is less than the length of b1.

7. The non-perforated wire EDM process according to claim 2, characterized in that, The groove is a rectangular groove, and the first plate or the second plate includes both the groove and the protrusion, with the protrusion blocking the opening of the groove.

8. The non-perforated wire EDM process according to claim 7, characterized in that, Assuming the starting and ending segments of the cutting trajectory (3) are k0 and k1 respectively, the line segments that cut out the groove and the protrusion are a1, b1, a2, b2, a3, b3, a4 connected end to end in sequence, where a1, a2, a3, a4 all extend along the Y direction, and k0, k1, b1, b2, b3 all extend along the X direction. The starting point of a1 is connected to the ending point of k0, the ending point of a4 is connected to the starting point of k1, the length of b2 is less than the length of b3, and the length of a3 is the same as the length of a4.

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