Bridge type clamp for linear cutting of hot extrusion die and using method of bridge type clamp

Abstract

The invention discloses a bridge type clamp for wire cutting of a hot extrusion die and a using method of the bridge type clamp, and belongs to the technical field of hot extrusion dies. The clamp comprises a base; a supporting seat; a fixed seat; the supporting piece is used for supporting a workpiece; the locking mechanism comprises a first locking piece and a second locking piece; and the machining part comprises a cutting area and a tool setting opening. According to the bridge type clamp for wire cut electrical discharge machining of the hot extrusion mold, through the design of the supporting piece, the bridge type clamp can adapt to molds of different shapes and sizes, an operator only needs to simply adjust the positions of the fixing base and the supporting piece, clamping of the molds of various specifications can be achieved, flexibility is improved, an extrusion clamp is not needed in the use process of the clamp, and cost is reduced. And the service life is greatly prolonged, the machining precision is greatly improved, the clamp does not need to be disassembled when the angle of the die needs to be adjusted, and manual adjustment is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of hot extrusion dies, and in particular to a bridge clamp for hot extrusion die wire cutting and a use method thereof. Background Art

[0002] In modern manufacturing, hot extrusion molding technology is widely used in the processing of metals and plastics, especially in high-precision fields such as automobiles, aerospace and electronics, where the design and manufacture of hot extrusion dies are crucial. In the process of mold processing, wire EDM technology is widely used because it can achieve high-precision cutting of complex shapes. Wire cutting machines use metal wires as electrodes to cut workpieces through electric spark discharge. Its advantages are high cutting accuracy and strong adaptability.

[0003] In the process of processing a micro-channel tube mold (also known as an oblique rib tube mold), it is necessary to perform oblique electric spark wire cutting on the male mold protrusion of the mold, and the mold needs to be tilted at a certain angle before processing. The clamps generally used are flat clamps or clamps that fix one side. This type of clamp often requires concentrated pressure clamping, which will cause scratches on the mold or leave marks on the mold surface, thereby affecting the service life and processing accuracy of the mold. In addition, this type of clamp is complicated to operate when adjusting the inclination angle of the mold. A slight adjustment requires the entire clamp to be removed, which is very inconvenient. To this end, we proposed a bridge clamp for wire cutting of hot extrusion molds and its use method. Summary of the invention

[0004] The object of the present invention is to provide a bridge clamp for wire cutting of hot extrusion dies and a method for using the same, so as to solve the problems that the existing extrusion clamps easily cause scratches or marks on the processing dies, affecting the life of the dies and the processing accuracy, and that such clamps are complicated to operate when adjusting the inclination angle of the dies, and the clamps need to be removed as a whole for a slight adjustment, which is very inconvenient.

[0005] In order to solve the above technical problems, the present invention provides a bridge-type fixture for hot extrusion die wire cutting and a method for using the same, comprising a base;

[0006] A support seat, the support seat is arranged above the base;

[0007] A fixing seat, the fixing seat is mounted between the supporting seats;

[0008] A support member, the support member is arranged above the fixing seat and is used to support a workpiece;

[0009] A locking mechanism, the locking mechanism comprising a first locking member for limiting the position of the fixing seat, and a second locking member for fixing the supporting member;

[0010] A workpiece, the workpiece comprising a cutting area and a cutting edge arranged on one side of the workpiece;

[0011] The support seat, the fixing seat and the supporting member are all arranged in a pair;

[0012] The support member includes a wire guide opening that runs through the support member from top to bottom and is connected to the outside world;

[0013] The support member is made of high-strength material and consists of two opposite surfaces, forming an angle within the range of 120° to 150°, wherein the first surface is fixed by the second locking member, and the second surface is in contact with the workpiece for supporting the workpiece.

[0014] Preferably, the outer surface of the support member is a rough and dense fine-tooth surface, which is used to increase the friction between the second locking member and the processing member.

[0015] Preferably, the base includes a first slide groove arranged on a surface thereof, and stoppers arranged at both ends of the first slide groove.

[0016] Preferably, the support seat comprises a pair of first sliding blocks arranged at the bottom of both ends thereof, a second sliding groove arranged at one side of the support seat, and a plurality of limiting holes opened on the support seat;

[0017] The first sliding block cooperates with the first sliding groove.

[0018] Preferably, the fixing seat comprises a pair of second sliding blocks opened at the bottom of both ends thereof, and a plurality of fixing holes opened on the fixing seat;

[0019] The second sliding block cooperates with the second sliding groove.

[0020] Preferably, the second locking member comprises a fixing plate, and a pair of connecting members passing through the fixing hole and the fixing plate for fastening the fixing plate;

[0021] The outer surface of the fixing plate is also a rough and dense fine tooth surface, which is used to increase the friction between the fixing plate and the supporting member.

[0022] The present invention also provides a method for using a bridge-type clamp for hot extrusion die wire cutting, comprising the following steps:

[0023] Step S1: machining a cutting edge on a workpiece;

[0024] Step S2: The support member is mounted on the fixing seat by means of the second locking member, and the connecting member does not need to be locked at this time;

[0025] Step S3: adjusting and detecting the position of the support member by means of an electrode wire detection method so that the support member is parallel to the Y axis of the wire-cut EDM lathe, and locking the connector after the adjustment is completed;

[0026] Step S4: placing the workpiece on the support, supported by the support members on both sides, with the outer ring of the workpiece fitting against the upper surface of the support member. At this time, the workpiece is parallel to the X-axis and Z-axis of the lathe and perpendicular to the Y-axis of the lathe;

[0027] Step S5: Angle calibration, adjusting the workpiece angle by the electrode wire adjustment method so that the cutting edge section is parallel to the electrode wire;

[0028] Step S6: After the fixture and workpiece are installed, the lathe is started to perform wire cutting on the cutting area.

[0029] Preferably, the step S1 is processed on a CNC milling machine;

[0030] The tool alignment edge is parallel to the direction in which wire cutting needs to be performed in the cutting area, and is used for tool alignment with the electrode wire.

[0031] Preferably, the electrode wire detection method in step S3 includes:

[0032] S3-1: Move the electrode wire to one end of the edge of the support by remote control, energize the electrode wire, fix the Y-axis and Z-axis of the lathe, and adjust the X-axis of the lathe so that the electrode wire slowly contacts the support. Sparks will be generated when the two contact, and the machine will stop manually at the moment of contact.

[0033] S3-2: Slightly separate the two along the Y axis by a constant distance m, fix the X axis and Z axis of the lathe, and move the electrode wire along the Y axis to the other end of the edge of the support;

[0034] S3-3: Adjust the X-axis of the lathe so that the electrode wire slowly contacts the support again. After slowly moving the constant distance m, a small amount of sparks consistent with the previous ones will still be generated. At this time, the support position detection is completed;

[0035] S3-4: Adjust the support parts and repeat steps S3-1 to S3-3 several times to finally make both ends parallel to the Y axis. After alignment, lock the connector.

[0036] Preferably, the electrode wire adjustment method in step S5 is:

[0037] S5-1: First, rotate the workpiece to the position where the cross section of the cutting edge is parallel to the electrode wire, and remotely control the electrode wire to move it along the wire feed opening close to the cross section of the cutting edge;

[0038] S5-2: Power on the electrode wire, fix the Y-axis and Z-axis of the lathe, adjust the X-axis of the lathe so that the electrode wire slowly contacts the cross section of the tool edge, observe and continuously move the electrode wire close to and away from the tool edge, manually adjust the angle of the workpiece, make the spark size of the upper end and the lower end of the tool edge consistent, finally make the electrode wire parallel to the tool edge, and the tool setting is completed.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The bridge-type clamp for hot extrusion die wire cutting of the present invention can adapt to dies of different shapes and sizes through the design of the support member. The operator only needs to simply adjust the position of the fixing seat and the support member to clamp dies of various specifications. Not only is the flexibility improved, but also the clamp does not need to be squeezed during use, and scratches and marks will not be generated. The service life and processing accuracy are greatly improved. When the mold angle needs to be adjusted, the clamp does not need to be removed, and manual adjustment is more convenient;

[0041] 2. The method of using a bridge clamp for wire cutting of a hot extrusion die of the present invention is to visually observe the sparks generated when the electrode wire contacts the two ends of the cutting edge of the support and the workpiece through precise support member adjustment and electrode wire detection, and judge the degree of fit with the electrode wire, thereby adjusting the angle between the support and the workpiece to ensure that the support and the workpiece are parallel to the axes of the wire cutting machine. This method greatly improves the accuracy of wire cutting and reduces the error caused by improper position of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a comparison diagram of a bridge-type fixture for hot extrusion die wire cutting provided by the present invention before and after die processing;

[0043] Figure 2 It is a schematic diagram of the working principle of a bridge-type clamp for wire cutting of hot extrusion dies provided by the present invention;

[0044] Figure 3 It is a cross-sectional view of a bridge-type fixture for wire cutting of a hot extrusion die provided by the present invention;

[0045] Figure 4 It is a schematic diagram of the overall structure of a bridge-type fixture for wire cutting of a hot extrusion die provided by the present invention;

[0046] In the figure: 1. base; 101. first slide groove; 102. stopper; 2. support seat; 201. first slider; 202. second slide groove; 203. limit hole; 3. fixed seat; 301. second slider; 302. fixed hole; 4. support member; 401. wire feed port; 5. locking mechanism; 501. first locking member; 502. second locking member; 502a. fixed plate; 502b. connecting member; 6. workpiece; 601. cutting area; 602. knife edge. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0050] Embodiment 1

[0051] The present invention provides a bridge fixture for hot extrusion die wire cutting, please refer to Figures 1 to 4, including a base 1; a support seat 2, wherein the support seat 2 is arranged above the base 1; a fixed seat 3, wherein the fixed seat 3 is mounted between the support seats 2; a support member 4, wherein the support member 4 is arranged above the fixed seat 3 and is used to support a workpiece; a locking mechanism 5, wherein the locking mechanism 5 includes a first locking member 501 for limiting the fixed seat 3, and a second locking member 502 for fixing the support member 4; a processing member 6, wherein the processing member 6 includes a cutting area 601, and a knife edge 602 arranged on one side of the processing member 6.

[0052] The support seat 2, the fixing seat 3, and the support member 4 are all arranged in a pair. The support member 4 includes a wire feed port 401 that runs through it from top to bottom and is connected to the outside world; the support member 4 is made of high-strength material, and the support member 4 is composed of two opposite surfaces, forming an angle within the range of 120° to 150°, wherein the first surface is fixed by the second locking member 502, and the second surface is in contact with the workpiece 6, and is used to support the workpiece 6.

[0053] The base 1 includes a first slide groove 101 arranged on its surface, and stoppers 102 arranged at both ends of the first slide groove 101; the support seat 2 includes a pair of first sliders 201 arranged at the bottom of its two ends, a second slide groove 202 arranged on one side of the support seat 2, and a plurality of limiting holes 203 opened on the support seat 2; the first slider 201 cooperates with the first slide groove 101; the fixed seat 3 includes a pair of second sliders 301 opened at the bottom of its two ends, and a plurality of fixing holes 302 opened on the fixed seat 3; the second slider 301 cooperates with the second slide groove 202.

[0054] The second locking member 502 includes a fixing plate 502a, and a pair of connecting members 502b passing through the fixing hole 302 and the fixing plate 502a for fastening the fixing plate 502a; the outer surface of the fixing plate 502a is also a rough and dense fine tooth surface for increasing the friction between the fixing plate 502a and the supporting member 4.

[0055] It should be noted that the fixture needs to process the protruding part of the male mold of a micro-channel tube mold (also known as a ribbed tube mold), and multiple grooves need to be processed by electric spark wire cutting, such as Figure 1 As shown, the left side is before processing and the right side is after processing. The depth and angle of the groove are limited. Since the wire cutting direction of the EDM wire cutting machine can only be vertically downward, the fixture not only needs to play a positioning role, but also needs to be convenient for adjusting the angle.

[0056] Preferably, the base 1, the support seat 2 and the fixed seat 3 are all made of high-strength square steel material. The base 1 is fixedly installed on the workbench of the online cutting machine, and a first slide groove 101 is opened on its surface to pass through it. Stoppers 102 are provided at both ends of the first slide groove 101 to limit the moving range of the first slider 201 under the support seat 2 in the first slide groove to prevent it from sliding out of the two ends of the slide groove, thereby ensuring stability and safety.

[0057] Preferably, the support seat 2 can slide on the first slide groove 101 to adjust the distance according to the length of the fixed seat 3. The support seat 2 includes a first slider 201 fixedly installed at the bottom, and a second slide groove 202 opened on the side. The second slide groove 202 cooperates with the second slider 301 on the fixed seat 3 to enable the fixed seat 3 to slide on the support seat 2 to adjust the distance between the support members 4 on both sides according to the size of the mold. The top of the support seat 2 is also provided with limiting holes 203 arranged in an even array. The limiting holes 203 pass through the support seat 2 and are used to install the first locking member 501 to limit the fixed seat 3. The number of limiting holes 203 can be increased or decreased according to the specification range requirements of the mold processing.

[0058] Preferably, the upper surface of the fixing seat 3 is also provided with two rows of fixing holes 302 arranged in an even array, which penetrate the fixing seat 3 and can be used to install the support member 4 through the cooperation between the connecting piece 502b and the fixing hole 302. In this embodiment, the connecting piece 502b uses a pair of bolts and nuts, and the fixing plate 502a is a rectangular metal plate. A runway-shaped bolt groove is provided at both ends of the fixing plate 502a. The long bolts pass through the fixing holes 302 in turn, and the fixing plate 502a is finally fixed with nuts. The bolt groove is set in a runway shape to provide a certain amount of moving space for the fixing plate, so that the position of the fixing plate can be fine-tuned during installation to better align and adapt to the bolts and nuts. The outer surface of the fixing plate 502a adopts a rough and dense fine tooth surface design, which can effectively increase the friction between the support member 4 and the support member 4, thereby improving the stability and reliability of the connection. During installation, the approximate position of the support member 4 can be fixed by the connecting piece first, without locking, and then fixed again after the position of the support member 4 is adjusted to ensure the accuracy and stability of the connection.

[0059] Preferably, the outer surface of the support member 4 is also rough and densely toothed, so as to increase the friction between the second locking member 502 and the processing member 6 , thereby improving the locking stability of the second locking member 502 and the stability of the processing member 6 placed on the support member 4 .

[0060] Preferably, the wire feed opening 401 passes through the support member 4 to facilitate the alignment of the electrode wire with the cutting edge 602. During the alignment, the electrode wire must pass through the support member 4 and contact the cutting edge 602. However, the width of the support member 4 often needs to be designed to take into account the application of molds of various specifications. Therefore, when the support member 4 is used for some thinner molds, the electrode wire needs to pass through the wire feed opening 401 for alignment, thereby meeting diverse processing needs and enabling it to adapt to molds of different specifications.

[0061] It should be noted that wire EDM is a process of cutting by using a metal wire as an electrode to electro-erode the workpiece through electric spark discharge. During the machining process, the electrode wire will not come into direct contact with the workpiece, and the position of the mold will not change during the movement of the electrode wire. Moreover, since the material of the mold is usually H13 mold steel, which has a large density and mass, even if the electrode wire does not completely touch the mold due to corrosion, it is difficult to overcome the friction between the mold and the support 4. Therefore, it is completely feasible to fix the mold by this bridge clamp.

[0062] In summary, the bridge clamp for wire cutting of hot extrusion dies of the present invention can adapt to dies of different shapes and sizes through the design of the support parts. The operator only needs to simply adjust the position of the fixing seat and the support parts to clamp dies of various specifications. Not only is the flexibility improved, but there is no need to squeeze the clamp during use, and no scratches or marks will be left. The service life and processing accuracy are greatly improved. There is no need to remove the clamp when the mold angle needs to be adjusted, and manual adjustment is more convenient.

[0063] Embodiment 2

[0064] The present invention provides a method for using a bridge clamp for hot extrusion die wire cutting, please refer to Figures 1 to 4 , including the following steps:

[0065] Step S1: machining a cutting edge 602 on a workpiece 6;

[0066] Step S2: The support member 4 is mounted on the fixing base 3 by means of the second locking member 502. At this time, the connecting member 502b does not need to be locked;

[0067] Step S3: adjusting and detecting the position of the support member 4 by means of an electrode wire detection method so that the support member 4 is parallel to the Y axis of the wire-cut EDM lathe, and locking the connecting member 502b after the adjustment is completed;

[0068] Step S4: placing the workpiece 6 on the support 4, supported by the support 4 on both sides, with the outer ring of the workpiece 6 fitting with the upper surface of the support 4. At this time, the workpiece 6 is parallel to the X-axis and Z-axis of the lathe and perpendicular to the Y-axis of the lathe;

[0069] Step S5: Angle calibration, adjusting the angle of the workpiece 6 by the electrode wire adjustment method, so that the cross section of the cutting edge 602 is parallel to the electrode wire;

[0070] Step S6: After the fixture and the workpiece are installed, the lathe is started to perform wire cutting on the cutting area 601 .

[0071] The step S1 is processed on a CNC milling machine; the tool edge 602 is parallel to the direction of wire cutting required in the cutting area 601 and is used for tool alignment with the electrode wire.

[0072] The electrode wire detection method in step S3 includes:

[0073] S3-1: Move the electrode wire to one end of the edge of the support 4 by remote control, energize the electrode wire, fix the Y-axis and Z-axis of the lathe, and adjust the X-axis of the lathe so that the electrode wire slowly contacts the support 4. Sparks will be generated when the two contact, and the machine will stop manually at the moment of contact;

[0074] S3-2: Slightly separate the two along the Y axis by a constant distance m, fix the X axis and Z axis of the lathe, and move the electrode wire along the Y axis to the other end of the edge of the support 4;

[0075] S3-3: Adjust the X-axis of the lathe so that the electrode wire slowly contacts the support 4 again. After slowly moving the constant distance m, a small amount of sparks consistent with the previous ones will still be generated. At this time, the position detection of the support 4 is completed;

[0076] S3-4: Adjust the support member 4 and repeat steps S3-1 to S3-3 for multiple times to finally achieve parallelism between the two ends and the Y axis. After the alignment is completed, lock the connecting member 502b.

[0077] The electrode wire adjustment method in step S5 is:

[0078] S5-1: firstly rotate the workpiece 6 to a position where the cross section of the cutting edge 602 is roughly parallel to the electrode wire, and remotely control the electrode wire to move along the wire feed opening 401 to approach the cross section of the cutting edge 602;

[0079] S5-2: Power on the electrode wire, fix the Y-axis and Z-axis of the lathe, adjust the X-axis of the lathe so that the electrode wire slowly contacts the cross section of the tool edge 602, observe and continuously move the electrode wire close to and away from the tool edge, adjust the angle of the workpiece 6, make the spark size of the upper end and the lower end of the tool edge 602 consistent, finally make the electrode wire parallel to the tool edge 602, and the tool setting is completed.

[0080] In summary, the method of using a bridge clamp for wire cutting of a hot extrusion die of the present invention is to visually observe the sparks generated when the electrode wire contacts the two ends of the cutting edge of the support member and the workpiece through precise support member adjustment and electrode wire detection, and judge the degree of fit with the electrode wire, thereby adjusting the angle between the support member and the workpiece, ensuring that the support member and the workpiece are parallel to the axes of the wire cutting machine. This method greatly improves the accuracy of wire cutting and reduces the error caused by improper position of the workpiece.

[0081] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A bridge fixture for hot extrusion die wire cutting, characterized in that: include, Base (1); A support seat (2), wherein the support seat (2) is arranged above the base (1); A fixing seat (3), the fixing seat (3) being mounted between the supporting seats (2); A support member (4), the support member (4) being arranged above the fixing seat (3) and being used for supporting a workpiece; A locking mechanism (5), the locking mechanism (5) comprising a first locking member (501) for limiting the position of the fixing seat (3), and a second locking member (502) for fixing the supporting member (4); A processing piece (6), the processing piece (6) comprising a cutting area (601) and a cutting edge (602) arranged on one side of the processing piece (6); The support seat (2), the fixing seat (3) and the support member (4) are all arranged as a pair; The support member (4) comprises a wire feed opening (401) which runs through the support member from top to bottom and is in communication with the outside world; The support member (4) is made of a high-strength material and is composed of two opposite surfaces, forming a folded angle within a range of 120° to 150°, wherein the first surface is fixed by the second locking member (502), and the second surface is in contact with the processing member (6) for supporting the processing member (6).

2. A bridge fixture for hot extrusion die wire cutting as claimed in claim 1, characterized in that: The outer surface of the support member (4) is a rough and densely-toothed surface, which is used to increase the friction between the support member (4) and the second locking member (502) and the processing member (6).

3. A bridge fixture for hot extrusion die wire cutting as claimed in claim 2, characterized in that: The base (1) comprises a first sliding groove (101) arranged on a surface thereof, and stoppers (102) arranged at two ends of the first sliding groove (101).

4. A bridge fixture for hot extrusion die wire cutting as claimed in claim 3, characterized in that: The support seat (2) comprises a pair of first sliding blocks (201) arranged at the bottom of both ends thereof, a second sliding groove (202) arranged at one side of the support seat (2), and a plurality of limiting holes (203) opened on the support seat (2); The first sliding block (201) cooperates with the first sliding groove (101).

5. A bridge fixture for hot extrusion die wire cutting as claimed in claim 4, characterized in that: The fixing seat (3) comprises a pair of second sliding blocks (301) provided at the bottom of both ends thereof, and a plurality of fixing holes (302) provided on the fixing seat (3); The second sliding block (301) cooperates with the second sliding groove (202).

6. A bridge fixture for hot extrusion die wire cutting as claimed in claim 5, characterized in that: The second locking member (502) comprises a fixing plate (502a), and a pair of connecting members (502b) passing through the fixing hole (302) and the fixing plate (502a) for fastening the fixing plate (502a); The outer surface of the fixing plate (502a) is also a rough and densely-toothed surface, so as to increase the friction between the fixing plate (502a) and the supporting member (4).

7. A method for using the bridge clamp for electric spark wire cutting of hot extrusion dies according to any one of claims 1 to 6, characterized in that: The steps include: Step S1: machining a cutting edge (602) on a workpiece (6); Step S2: The support member (4) is mounted on the fixing seat (3) by means of the second locking member (502), and at this time, the connecting member (502b) does not need to be locked; Step S3: adjusting and detecting the position of the support member (4) by means of an electrode wire detection method so that the support member (4) is parallel to the Y axis of the wire-cut electric discharge lathe, and locking the connecting member (502b) after the adjustment is completed; Step S4: placing the workpiece (6) on the support member (4), supported by the support members (4) on both sides, with the outer ring of the workpiece (6) fitting against the upper surface of the support member (4). At this time, the workpiece (6) is parallel to the X-axis and Z-axis of the lathe and perpendicular to the Y-axis of the lathe; Step S5: Angle calibration, adjusting the angle of the workpiece (6) by the electrode wire adjustment method so that the cross section of the cutting edge (602) is parallel to the electrode wire; Step S6: After the fixture and the workpiece are installed, the lathe is started to perform wire cutting on the cutting area (601).

8. The method for using a bridge clamp for wire cutting of a hot extrusion die according to claim 7, characterized in that: The step S1 is processed on a CNC milling machine; The alignment edge (602) is parallel to the direction in which wire cutting needs to be performed in the cutting area (601), and is used for alignment with the electrode wire.

9. The method for using a bridge clamp for wire cutting of a hot extrusion die according to claim 8, characterized in that: The electrode wire detection method in step S3 includes: S3-1: The electrode wire is remotely moved to one end of the edge of the support (4), the electrode wire is energized, the Y axis and Z axis of the lathe are fixed, and the X axis of the lathe is adjusted so that the electrode wire slowly contacts the support (4). When the two contact, electric sparks are generated, and the operation is stopped manually at the moment of contact; S3-2: Slightly separate the two along the Y axis by a constant distance m, fix the X axis and Z axis of the lathe, and move the electrode wire along the Y axis to the other end of the edge of the support (4); S3-3: Adjust the X-axis of the lathe so that the electrode wire slowly contacts the support (4) again. After slowly moving the constant distance m, a small amount of sparks consistent with the previous ones will still be generated. At this time, the position detection of the support (4) is completed; S3-4: Adjust the support member (4) and repeat steps S3-1 to S3-3 for multiple times to finally achieve parallelism between the two ends and the Y axis. After alignment is completed, lock the connecting member (502b).

10. A method for using the bridge clamp for electric spark wire cutting of hot extrusion dies as claimed in claim 9, characterized in that: The electrode wire adjustment method in step S5 is: S5-1: The workpiece (6) is rotated to a position where the cross section of the tool edge (602) is approximately parallel to the electrode wire, and the electrode wire is remotely controlled to move along the wire feed opening (401) to approach the cross section of the tool edge (602); S5-2: Power on the electrode wire, fix the Y-axis and Z-axis of the lathe, adjust the X-axis of the lathe so that the electrode wire slowly contacts the cross section of the cutting edge (602), and manually adjust the angle of the workpiece (6) by observing and continuously moving the electrode wire closer to and away from the cutting edge so that the sparks at the upper and lower ends of the cutting edge (602) are consistent in size. Finally, the electrode wire is parallel to the cutting edge (602), and the cutting is completed.

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