Large aspect ratio batch wire sawing of sections

Abstract

The application discloses a kind of large slender ratio equal cross-section workpiece wire cutting batch preparation methods, comprising the following steps: step 1: preparing column blank, and processing through hole at the center axis of blank;Step 2: planning workpiece arrangement mode, interval arrangement multiple workpiece cross-sectional profiles in the cross section of blank;Step 3: according to the arrangement mode of workpiece in step 2 and the diameter of wire cutting wire, planning and generating cutting track, the starting point of cutting track is located in through hole, and the profile of all workpieces is connected;Step 4: running wire cutting wire, so that it is cut into shape along the cutting track in step 3 to workpiece, in the cutting process, the stabilizing piece is inserted into the cutting gap of the workpiece being cut, so that it is partially interference fit in cutting gap.The workpiece preparation method provided by the application solves the chatter problem existing when machining this type of workpiece, improves the machining accuracy, and realizes the batch preparation of large slender ratio equal cross-section workpiece.

Description

Technical Field

[0001] This invention relates to the field of electrical discharge machining, and in particular to a method for mass production of workpieces with large aspect ratio and uniform cross-section by wire cutting. Background Technology

[0002] The ratio of the length to the maximum width of a workpiece with a large slenderness ratio and uniform cross-section is typically greater than 10:1, resulting in poor rigidity and low deflection. Existing machining methods such as turning and milling are prone to chattering when machining workpieces with large slenderness ratios and uniform cross-sections, which can even lead to plastic bending and scrapping of the workpiece in severe cases.

[0003] Wire EDM is a special machining technology based on electrothermal mechanisms to remove material. It is a non-contact machining method widely used in industries such as aerospace, automotive, and mold making. During processing, the electrode wire is connected to the positive terminal of the power supply, and the workpiece is connected to the negative terminal. A certain discharge gap is maintained between the electrode wire and the workpiece. The electrode wire moves at a certain speed, coordinating with the workpiece on the worktable to move along a specific trajectory, thus achieving the cutting and shaping of the workpiece. This process is suitable for machining high-hardness materials with complex two-dimensional shapes. However, related technologies using wire EDM to machine workpieces with large aspect ratios and uniform cross-sections suffer from problems such as poor stability, easy wire jamming and breakage, low batch production efficiency, and high cost. Therefore, researching new wire EDM batch production methods for workpieces with large aspect ratios and uniform cross-sections is of great significance. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a method for batch production of slender-ratio, uniform-section workpieces via wire EDM with high stability.

[0005] The method for batch production of workpieces with large slenderness ratio and uniform cross-section by wire cutting according to an embodiment of the present invention includes the following steps:

[0006] Step 1: Prepare a cylindrical blank and machine a through hole at the central axis of the blank;

[0007] Step 2: Plan the workpiece layout, and arrange multiple cross-sectional contours of the workpieces at intervals within the cross-section of the blank;

[0008] Step 3: Based on the arrangement of the workpieces in Step 2 and the diameter of the wire cutting wire, plan and generate the cutting trajectory. The starting point of the cutting trajectory is located inside the through hole and connects the contours of all workpieces.

[0009] Step 4: Install the blank and the wire cutting wire, so that the wire cutting wire passes through the through hole and is parallel to the axis of the blank. Run the wire cutting wire to cut the workpiece one by one along the cutting trajectory in Step 3. During the cutting process, insert the stabilizing part into the cutting gap of the workpiece being cut, so that part of it is interference fit in the cutting gap.

[0010] The workpiece preparation method provided in this invention prepares workpieces with large aspect ratio and uniform cross-section by wire cutting. There is no cutting force during the processing, which solves the chatter problem that exists during the cutting of such workpieces, improves the processing accuracy, and fixes the workpiece to be formed by inserting a stabilizer into the cutting gap of the workpiece being cut, thereby reducing the chatter of the workpiece at the end of the processing and reducing the probability of wire jamming or wire breakage caused by workpiece swing, further improving the stability of wire cutting and realizing the batch preparation of workpieces with large aspect ratio and uniform cross-section.

[0011] Optionally, in step 2, the gap between the cross-sectional contours of the workpiece is 2 to 6 times the diameter of the pre-selected wire cutting wire.

[0012] Optionally, the blank has a circular cross-section, and the workpieces in step 2 are arranged in a ring array. Multiple workpieces are divided into multiple groups, each group comprising multiple workpieces spaced apart along the circumference of the blank, and the multiple workpiece groups are nested sequentially in the inner and outer directions; or...

[0013] The blank has a square cross-section. In step 2, the workpieces are arranged in a linear array. Multiple workpieces are divided into multiple groups. Each workpiece group includes multiple workpieces spaced apart along the long side of the square. Multiple workpiece groups are spaced apart along the wide side of the square.

[0014] Optionally, the workpieces are arranged in a circular array. In step 3, the cutting trajectory includes an intra-group connecting line that connects the contours of the multiple workpieces in the group and an inter-group connecting line that connects two adjacent groups of workpieces. The intra-group connecting line is an arc, and the inter-group connecting line is a straight line.

[0015] Optionally, the intra-group connecting line is an arc tangent to the contour of the workpiece, and the inter-group connecting line is a straight line tangent to the contour of the workpiece.

[0016] Optionally, the stabilizer is a T-shaped structure, comprising a small-diameter section and a large-diameter section connected to the small-diameter section. The small-diameter section is used to fit in the cutting gap, and the end face of the large-diameter section abuts against the end face of the workpiece.

[0017] Optionally, the stabilizing element is an elastic element, and the diameter of the small-diameter section is 1 to 3 times the diameter of the wire cutting wire.

[0018] Optionally, in step 4, during the cutting process, when the contour of a single workpiece is machined to 70%-90%, multiple stabilizers are installed so that the multiple stabilizers are arranged around the workpiece.

[0019] Optionally, in step 4, when installing the blank, the blank is clamped in a clamping fixture. The clamping fixture is an overall ring structure and includes at least two clamps arranged circumferentially. The multiple clamps cooperate to clamp the blank.

[0020] Optionally, the ratio of the length to the maximum width of the workpiece is greater than or equal to 10:1 and less than or equal to 60:1. Attached Figure Description

[0021] Figure 1 This is a flowchart of a method for mass production of workpieces with large slenderness ratio and uniform cross-section by wire cutting, provided in an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the preparation apparatus provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the wire cutting process provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the workpiece arrangement provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the cutting trajectory provided in an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of the stabilizer provided in an embodiment of the present invention.

[0027] Figure label:

[0028] 1. Blank, 11. Through hole, 2. Workpiece, 21. Outer perimeter, 3. Wire EDM wire, 4. Cutting trajectory, 41. Inner serial wire, 42. Inter-group serial wire, 43. Route, 5. Stabilizer, 51. Small diameter section, 52. Large diameter section, 6. Fixture. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following is based on Figure 1-6This invention describes a method for batch manufacturing of workpieces with large slenderness ratio and uniform cross-section via wire EDM, as provided in embodiments of the present invention. The wire EDM manufacturing method provided in this invention is particularly suitable for batch manufacturing of workpieces with a large slenderness ratio and uniform cross-section, where the length-to-maximum-width ratio (slenderness ratio) is greater than 10:1. The manufacturing method includes the following steps:

[0031] Step 1: Prepare a cylindrical blank 1 and machine a through hole 11 at the central axis of the blank 1;

[0032] Step 2: Plan the workpiece layout, and arrange the cross-sectional outlines of multiple workpieces 2 at intervals within the cross-section of blank 1.

[0033] Step 3: Based on the arrangement of workpieces 2 in Step 2 and the diameter of wire cutting wire 3, plan and generate cutting trajectory 4. The starting point of cutting trajectory 4 is located inside the through hole 11, and it connects the contours of all workpieces 2.

[0034] Step 4: Install the blank 1 and the wire cutting wire 3, so that the wire cutting wire 3 passes through the through hole 11 and is parallel to the axis of the blank 1. Run the wire cutting wire 3 so that it cuts the workpiece 2 one by one along the cutting trajectory 4 in step 3. During the cutting process, insert the stabilizing part 5 into the cutting gap of the workpiece 2 being cut, so that part of the stabilizing part 5 is interference-fitted in the cutting gap.

[0035] The workpiece preparation method provided in this invention prepares workpieces with large aspect ratio and uniform cross-section by wire cutting. There is no cutting force during the processing, which solves the chatter problem that exists during the cutting of such workpieces, improves the processing accuracy, and fixes the workpiece to be formed by inserting a stabilizer into the cutting gap of the workpiece being cut, thereby reducing the chatter of the workpiece at the end of the processing and reducing the probability of wire cutting wire jamming or breakage caused by workpiece swing, further improving the stability of wire cutting and realizing the batch preparation of workpieces with large aspect ratio and uniform cross-section.

[0036] In some embodiments, the ratio of the length to the maximum width of the workpiece 2 is greater than or equal to 10:1 and less than or equal to 60:1.

[0037] Step 1 specifically includes pre-processing the incoming material and machining it into a cylindrical blank 1 with a uniform cross-section (e.g., a cylinder or a square prism) using turning, milling, or sawing methods. Figure 4 As shown, blank 1 is a cylinder with a circular cross-section. A through hole 11 extending along its axial direction is machined into blank 1. Figure 4 In the embodiment shown, the through hole 11 is a through circular hole.

[0038] Optionally, in the pre-processing of incoming materials, when the incoming material is a bar stock, it is machined into a cylindrical blank 1 by turning; when the incoming material is a block stock, it is machined into a square column blank 1 by milling; when the incoming material is of other forms, it is machined into an irregular cross-section column blank 1 by a combination of turning and milling; when the length of the incoming material is a multiple of the length of the workpiece 1, the incoming material is cut by a band saw, wire saw or other sawing method before turning and milling, so that the material is 2mm-20mm longer than the workpiece 2.

[0039] Step 2 specifically involves the arrangement and optimization of the workpiece 2 array. For example... Figure 4 As shown, in step 2, multiple workpiece 2 cross-sectional profiles are arranged at intervals within the cross-section of the blank 1, and the array arrangement of the workpiece 2 can maximize the utilization of the material of the blank 1, so that more cross-sections of the workpiece 2 can be arranged within the cross-sectional profile of the blank 1, so that the blank 1 can produce more workpieces 2 with equal cross-sections, thereby reducing the manufacturing cost, improving the material utilization rate, and improving the processing efficiency, realizing low-cost, batch manufacturing of workpieces with large aspect ratios and equal cross-sections.

[0040] In some embodiments, the cross-section of the blank 1 is circular. To improve material utilization, the arrangement of the workpieces 1 is preferably a ring array. Specifically, as shown in the figure... Figure 4 As shown, multiple workpieces 1 distributed in the cross-sectional contour of blank 1 are divided into four groups. Each workpiece group includes multiple workpieces 2 arranged at intervals along the circumference of blank 1. The four workpiece groups are sequentially nested in the inward and outward directions (directions closer to and farther from the central axis of blank 1), that is, the four workpiece groups are sequentially nested from the inside to the outside to form a circular array arrangement. Of course, in other embodiments, the number of workpiece groups (layers) can be designed and selected according to the cross-sectional area and shape of workpiece 2 and the diameter of blank 1 to maximize the utilization of blank 1 in the radial direction.

[0041] like Figures 2-4 As shown, in this embodiment of the invention, the length of workpiece 2 is along the axial direction of blank 1, and its cross-section is elongated. Two adjacent workpieces 2 in the circumferential direction have adjacent long sides, and the workpieces 2 are arranged closely to maximize the number of workpieces 2 arranged in the circumferential direction. Furthermore, based on the shape characteristics of the cross-section of workpiece 2, the workpieces 2 in the same group are deflected at a certain angle, such as... Figure 4 As shown, the outer side of workpiece 2 in the same group has a certain angle of deflection in the clockwise direction. While maximizing the number of workpieces 2 in the circumferential direction, the size occupied by this workpiece group in the radial direction is optimized to optimize the number of workpiece groups. For example, Figure 4 As shown, the deflection angles of workpieces 2 in different workpiece groups vary, resulting in four workpiece groups being closely arranged within the cross-section of blank 1.

[0042] In other embodiments, the cross-section of the blank 1 can also be square. In order to improve material utilization, the arrangement of the workpieces 2 is preferably a linear array. Multiple workpieces 2 are divided into multiple groups. Each workpiece group includes multiple workpieces 2 arranged at intervals along the long side of the square. Multiple workpiece groups are arranged at intervals along the wide side of the square, thereby maximizing the number of workpieces 2 processed.

[0043] Therefore, the wire cutting batch preparation method for workpieces with large slenderness ratio and equal cross-section provided in this embodiment of the invention takes the maximum quantity solution as the optimization goal. By adjusting the angle and number of layers of the workpiece 2 array arrangement, the number of workpieces 2 prepared from a single incoming material is increased, the material utilization rate is improved, and low-cost, batch preparation of workpieces 2 with large slenderness ratio and equal cross-section is achieved.

[0044] In step 2, the gap between the cross-sectional contours of workpiece 2 can be selected based on the pre-selected diameter of the wire EDM wire 3 and the processing parameters. Optionally, the gap between the cross-sectional contours of workpiece 2 is 2 to 6 times the diameter of the pre-selected wire EDM wire 3.

[0045] Step 3 specifically involves planning and generating the cutting trajectory 4. For example... Figure 5 As shown, based on the pre-selected diameter of the wire EDM wire 3 and the processing parameters of the wire EDM machine, the cross-sectional contours of the workpieces 2 are sequentially connected from the inside out, layer by layer, with the position corresponding to the center of the through hole 11 of the blank 1 as the center, until all the cross-sectional contours of the workpieces 2 are connected, generating the cutting trajectory 4. By combining the workpiece cross-section array arrangement in step 2 with the cutting trajectory 4 in step 3, the wire EDM wire 3 can complete the processing of hundreds of workpieces in one run, achieving high processing efficiency, low production cost, and meeting the needs of mass production.

[0046] Those skilled in the art will understand that, since wire EDM is a non-contact machining technology, when the wire EDM wire 3 cuts the workpiece 2, there is a certain gap between the actual path 43 traversed by its central axis and the outer periphery 21 of the workpiece 2. This gap is related to the diameter of the pre-selected wire EDM wire 3 and the machining parameters of the wire EDM machine. Those skilled in the art can design according to actual conditions, which will not be elaborated here. Since this gap is relatively small, it is assumed that this gap will not be considered below, and the cutting trajectory 4 will be described as part of the "contour line of the workpiece 2." That is, the cutting trajectory 4 consists of the contour line when cutting the workpiece 2 and the connecting line that connects the contour lines of the workpiece 2.

[0047] In the planning and generation of cutting trajectory 4, the connecting line can be a straight line, a circular arc, or a spline curve. Specifically, for example... Figure 3As shown, the connecting wires of the cutting trajectory 4 include intra-group connecting wires 41 that connect the contours of multiple workpieces 2 within a group, and inter-group connecting wires 42 that connect two adjacent workpiece groups. The intra-group connecting wires 41 are used to connect the cross-sectional contours of each workpiece 2 within a group. Preferably, the intra-group connecting wires 41 connect the contours of two adjacent workpieces 2 to shorten the length of the cutting trajectory 4 and improve processing efficiency. The contours of the workpieces 2, the intra-group connecting wires 41, and the inter-group connecting wires 42 combine to generate the cutting trajectory 4.

[0048] In some embodiments, such as Figure 5 As shown, the blank 1 has a circular cross-section, and the workpieces 2 are arranged in a ring array. The connecting line 41 within the group is an arc, and the connecting line 42 between groups is a straight line. This is because the workpieces 2 within the same group are connected circumferentially, and the arc connecting line 41 within the group facilitates a smooth connection of the outlines of two adjacent workpieces 2. The straight connecting line 42 helps to shorten the length of the cutting trajectory 4 and improve work efficiency.

[0049] Preferably, such as Figure 3 As shown, the intra-group connecting line 41 is an arc tangent to the contour of the workpiece 2, and the inter-group connecting line 42 is a straight line tangent to the contour of the workpiece 2. This helps the wire cutting wire 3 to cut smoothly and avoids the risk of wire jamming or breakage.

[0050] When drawing tangent circular arcs or tangent straight lines will cause planar interference or over-tangency, spline curves should be used as connecting lines instead.

[0051] Step 4 specifically involves wire EDM machining. The cutting trajectory from Step 3 is imported into the wire EDM machine tool, a machining program is compiled, the blank 1 and the pre-selected wire EDM wire 3 are installed, the wire EDM wire 3 is passed through the through hole 11, and the wire EDM wire 3 is aligned so that it is parallel to the axis of the blank 1. Machining parameters are set according to the pre-selected values. The program runs, and the wire EDM wire 3 begins to cut the blank 2 along the cutting trajectory 4. A slit is formed in the cutting area traversed by the wire EDM wire 3. When the contour of a single workpiece 2 is completed, one workpiece 2 is formed. The program continues to run, and workpieces 2 are formed one by one. The process continues until the wire EDM wire 3 completes the cutting trajectory 4, at which point the program ends, and machining is complete. Auxiliary devices are used in conjunction with the machining process.

[0052] The auxiliary device includes a clamping fixture 6 and a stabilizing component 5. In step 4, when installing the blank 1, the blank 1 is clamped in the clamping fixture 6. The clamping fixture 6 has an overall ring structure and includes at least two circumferentially arranged clamps. The multiple clamps cooperate to clamp the blank 1. Furthermore, during clamping, the clamping fixture 6 undergoes slight deformation to clamp the blank 1, achieving a stable installation of the blank 1.

[0053] like Figure 6As shown, the stabilizer 5 has a T-shaped structure, comprising a small-diameter section 51 and a large-diameter section 52 connected to the small-diameter section 51. The small-diameter section 51 fits in the cutting gap, and the end face of the large-diameter section 52 abuts against the end face of the workpiece 2. The stabilizer 5 helps to reduce the vibration of the workpiece 2 at the end of the machining process, reduces the probability of wire jamming or breakage caused by the workpiece 2 swinging, and improves the stability of wire EDM machining.

[0054] Optionally, the stabilizer 5 is an elastic element, and the diameter of the small diameter section 51 is 1 to 3 times the diameter of the wire cutting wire, so as to better stabilize the workpiece 2 at the end of the machining process.

[0055] Specifically, in step 4, during the cutting process, when the contour of a single workpiece 2 is machined to 70%-90%, multiple stabilizers 5 are installed, so that the multiple stabilizers 5 are arranged around the workpiece 2. For example, Figure 3 As shown, when the contour of a single workpiece 2 is machined to 80%, four stabilizing members 5 are inserted around the workpiece 2, so that its small diameter section 51 is embedded in the cutting gap formed by the machining, thereby achieving auxiliary fixation of the workpiece 2 that is about to be formed.

[0056] Furthermore, the preparation method also includes post-processing step 5: using a grinding wheel, file, etc. to grind the tool-jointing position of the workpiece 2, and cleaning the workpiece 2.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A method for batch production of workpieces with large slenderness ratio and uniform cross-section by wire cutting, characterized in that, Includes the following steps: Step 1: Prepare a cylindrical blank and machine a through hole at the central axis of the blank; Step 2: Plan the workpiece layout. Arrange multiple cross-sectional profiles of the workpieces at intervals within the cross-section of the blank. The ratio of the length to the maximum width of the workpiece is greater than or equal to 10:1 and less than or equal to 60:

1. Step 3: Based on the arrangement of the workpieces in Step 2 and the diameter of the wire cutting wire, plan and generate the cutting trajectory. The starting point of the cutting trajectory is located inside the through hole and connects the contours of all workpieces. Step 4: Install the blank and the wire cutting wire, so that the wire cutting wire passes through the through hole and is parallel to the axis of the blank. Run the wire cutting wire to cut the workpiece one by one along the cutting trajectory in Step 3. During the cutting process, when the contour of a single workpiece is processed to 70%-90%, insert multiple stabilizing components around the workpiece into the cutting gap of the workpiece being cut, so that part of them are interference fit in the cutting gap. The stabilizing components are elastic components; the stabilizing components are T-shaped structures, and the stabilizing components include a small diameter section and a large diameter section connected to the small diameter section. The small diameter section is used to fit in the cutting gap, and the end face of the large diameter section abuts against the end face of the workpiece. The diameter of the small diameter section is 1 to 3 times the diameter of the wire cutting wire.

2. The method for batch production of workpieces with large slenderness ratio and uniform cross-section by wire cutting according to claim 1, characterized in that, In step 2, the gap between the cross-sectional contours of the workpiece is 2 to 6 times the diameter of the pre-selected wire cutting wire.

3. The method for batch production of workpieces with large slenderness ratio and uniform cross-section by wire cutting according to claim 1, characterized in that, The blank has a circular cross-section, and the workpieces in step 2 are arranged in a circular array. Multiple workpieces are divided into multiple groups, and each workpiece group includes multiple workpieces spaced apart along the circumference of the blank. The multiple workpiece groups are nested sequentially in the inner and outer directions; or... The blank has a square cross-section. In step 2, the workpieces are arranged in a linear array. Multiple workpieces are divided into multiple groups. Each workpiece group includes multiple workpieces spaced apart along the long side of the square. Multiple workpiece groups are spaced apart along the wide side of the square.

4. The method for batch production of workpieces with large slenderness ratio and uniform cross-section by wire cutting according to claim 3, characterized in that, The workpieces are arranged in a circular array. In step 3, the cutting trajectory includes an intra-group connecting line that connects the contours of the multiple workpieces in the group and an inter-group connecting line that connects two adjacent groups of workpieces. The intra-group connecting line is an arc line, and the inter-group connecting line is a straight line.

5. The method for batch production of workpieces with large slenderness ratio and uniform cross-section by wire cutting according to claim 4, characterized in that, The intra-group connecting line is an arc tangent to the contour of the workpiece, and the inter-group connecting line is a straight line tangent to the contour of the workpiece.

6. The method for batch production of workpieces with large slenderness ratio and uniform cross-section by wire cutting according to claim 1, characterized in that, In step 4, when installing the blank, the blank is clamped in a clamping fixture. The clamping fixture is an overall ring structure and includes at least two clamps arranged circumferentially. The clamps cooperate to clamp the blank.

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