A center-adjustable and whole-division magnetic quick replacement device and method for wire cutting

Abstract

The application belongs to the technical field of precision machining, and discloses a magnetic quick replacement device and method with center adjustable and whole division function for wire cutting. The device comprises a fixing base, a magnetic indexing adapter disc, a center adjustable mounting disc, a center adjustable rod, a clamp positioning seat, a clamp accessory and a pressing block. The fixing base is used for being connected with a machine tool, the magnetic indexing adapter disc is quickly rotated and indexed and assembled and disassembled through magnetic force, the center adjustable mounting disc is precisely centered and angularly positioned through cooperation of a V-shaped groove and a positioning boss, the center adjustable rod can be adjusted in extension and retraction distance along a vertical direction, and the clamp positioning seat, the clamp accessory and the pressing block adopt modular interfaces. Through quick assembly and disassembly through magnetic force and modular design, the application realizes efficient clamping and quick replacement of complex parts with multiple faces, eccentricity and whole division faces, significantly reduces tooling design and clamping time, improves the adaptability and efficiency of wire cutting machining, and is suitable for precision machining of multiple varieties and small batch parts.

Description

Technical Field

[0001] This invention belongs to the field of precision measurement technology, and in particular to a magnetic quick-change device and method for wire cutting with adjustable center and calibrating function. Background Technology

[0002] Parts used in daily scientific research and production are characterized by complex shapes, diverse types, and small batches. Many complex-shaped parts often require multi-faceted machining during wire EDM, and the faces of the parts may not be coaxial or parallel. In daily processing, it is often necessary to design and manufacture multiple tooling fixtures for wire EDM, and the parts are completed after multiple clamping and alignment operations, resulting in low production efficiency.

[0003] However, the above processing method has the following drawbacks and can no longer meet the current high-efficiency production and processing requirements for a wide variety of small-batch scientific research parts: 1. To meet the multi-faceted machining requirements of the above-mentioned complex parts, wire EDM ordinary fixtures often need to be made into various complex toolings, and even equipment needs to be changed frequently, resulting in high processing costs.

[0004] 2. The cutting of the entire part requires the use of indexing equipment, which limits the stroke and clamping range of the wire EDM equipment.

[0005] 3. Cutting the eccentric surface of a part often requires multiple clamping operations, resulting in low clamping efficiency.

[0006] Chinese patent CN200998824Y discloses a multi-functional magnetic clamp for wire EDM, mainly used for clamping workpieces on wire EDM machines. The clamp mainly consists of a magnetic clamping part and a fixing part. The magnetic clamping part includes a magnetic chuck, upper and lower positioning plates, positioning blocks, brass plates, connecting seats, and auxiliary clamps, using magnetic force to clamp and position the workpiece. The fixing part, a clamp fixing seat, supports the magnetic clamping part and secures the clamp to the machine tool, using set screws to adjust the parallelism of the clamp. However, it cannot achieve precise indexing, center adjustment, or modular quick changeover, making it difficult to meet the high-efficiency machining needs of complex parts with multiple faces, eccentricities, and fully split surfaces. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a magnetic quick-change device and method for wire cutting with adjustable center and sizing function.

[0008] The technical solution adopted by this invention to solve its technical problem is: A magnetic quick-change device for wire EDM with center adjustment and indexing function is disclosed. The device can clamp workpieces and perform multi-face machining operations on them. The device includes a fixed base, a magnetic indexing adapter, a center-adjustable mounting plate, a center-adjustable rod, a fixture positioning seat, fixture accessories, and a clamping block. The fixed base, magnetic indexing adapter, and center-adjustable mounting plate are sequentially connected horizontally. The center-adjustable rod is vertically positioned and mounted on the upper part of the center-adjustable mounting plate. The lower part of the adjustable mounting plate is connected to the magnetic indexing adapter. The clamping block, fixture accessories, and fixture positioning seat are sequentially connected vertically and coaxially connected to the center-adjustable rod. The fixed base is mounted on the machine tool and provides stable support. The magnetic indexing adapter can rotate and index using magnetic force. The center-adjustable mounting plate provides support for the center-adjustable rod. The fixture positioning seat, fixture accessories, and clamping block clamp and rotate the workpiece.

[0009] Furthermore, the fixing seat includes a fixing seat base, reinforcing ribs, a fixing seat disc, a positioning stop, a fixing seat pin hole, and a fixing seat threaded through hole. The fixing seat base is arranged horizontally, and its lower surface is connected to the machine tool. The fixing seat disc is arranged vertically with its central axis arranged horizontally. The fixing seat disc is connected to the horizontal side of the fixing seat base and reinforced by the reinforcing rib. A positioning stop is integrally and coaxially formed inside the fixing seat disc, and the positioning stop is arranged horizontally. The fixing seat pin hole and the fixing seat threaded through hole are both arranged horizontally. Several fixing seat pin holes and fixing seat threaded through holes are evenly distributed around the positioning stop along the circumference and are all located on the fixing seat disc. The fixing seat pin hole and the fixing seat threaded through hole can provide a connection interface for the magnetic indexing adapter. The magnetic indexing adapter includes a positioning cylinder, a magnetic disk, a magnetic indexing plate, a tension threaded hole, a magnetic disk pin hole, a magnetic switch, a magnetic indexing plate pin hole, and a V-groove. The magnetic disk and the magnetic indexing plate are connected horizontally and are coaxially and tightly detachably mounted on the outside of the positioning cylinder. The central axes of the positioning cylinder, the magnetic disk, and the magnetic indexing plate are all horizontal. The positioning cylinder mates with a positioning stop, and the horizontal end of the positioning cylinder can be tightly and detachably inserted into the positioning stop. The tension threaded hole and the magnetic disk pin hole are respectively aligned with the fixed seat threaded through hole and the fixed seat pin hole. The tension threaded hole and the fixed seat threaded through hole can be connected by bolts; the magnetic disk and the magnetic indexing disk are connected by magnetism; the magnetic switch is installed on the magnetic disk and can control the on / off state of the magnetism between the magnetic disk and the magnetic indexing disk; the pin hole of the magnetic indexing disk is set to cooperate with the pin hole of the magnetic disk; the pin hole of the magnetic indexing disk, the pin hole of the magnetic disk, and the pin hole of the fixed seat can be fixedly connected by connecting pins; several V-grooves are evenly distributed at intervals along the circumference and are set on the horizontal side of the magnetic indexing disk away from the magnetic disk; the V-grooves can provide a connection slot for the center adjustable mounting plate.

[0010] Furthermore, the fixed base is provided with machine tool fixing holes along the vertical direction, and the machine tool fixing holes can be fixedly connected to the machine tool by bolts.

[0011] Furthermore, the central adjustable mounting plate includes a mounting plate body, a locking groove, a positioning slot, a positioning groove, and positioning bosses. The mounting plate body is arranged vertically and coaxially connected to the magnetic indexing adapter plate. Multiple positioning bosses are evenly distributed and spaced along the circumference on the horizontal side surface of the mounting plate body near the magnetic indexing adapter plate. The mounting plate body can be detachably connected to the magnetic indexing adapter plate through the positioning bosses. The positioning bosses are matched with V-shaped grooves and can be tightly and detachably engaged in the V-shaped grooves. The positioning groove and locking groove are both arranged on the horizontal side surface away from the magnetic indexing adapter plate. The positioning groove is located in the middle, and the locking groove is spaced on both sides of the longitudinal direction of the positioning groove. The positioning groove and positioning slot are both arranged vertically, and the top of the positioning groove is connected to the top of the mounting plate body through the positioning slot. The center adjustable rod includes a lead screw, a bearing, and a nut. The lead screw is arranged vertically, and a thread is provided on the outer surface of the lower middle part of the lead screw. The lower middle part of the lead screw can be inserted into the positioning slot hole and positioned in the positioning slide groove. The bearing and nut are engaged with the thread of the lead screw and are set on the thread of the lead screw in the positioning slide groove. The lead screw can be fixedly installed in the positioning slide groove and the extension distance can be adjusted. The center adjustable rod can adjust the extension distance in the center adjustable mounting plate.

[0012] Furthermore, the fixture positioning seat includes a positioning seat body, a first positioning surface, a positioning protrusion, and a second locking threaded hole. The positioning seat body is arranged longitudinally, and the longitudinal two side surfaces of the positioning seat body are set as the first positioning surface. The first positioning surface can provide the function of installation positioning for the fixture accessory. The positioning protrusion is installed at the center of the lower surface of the positioning seat body. The positioning protrusion can provide the positioning function for the installation of the fixture positioning seat. The second locking threaded hole is arranged vertically through both longitudinal sides of the positioning seat body. The fixture accessory includes a fixture accessory body, a second positioning surface, an accessory threaded hole, and a positioning contact recess. The fixture accessory body is arranged longitudinally, and the longitudinal two side surfaces of the fixture accessory body are set as the second positioning surface. The accessory threaded hole is arranged vertically through both sides of the longitudinal direction of the fixture accessory body, and the positioning contact recess is located at the center of the upper surface of the fixture accessory body. The clamping block includes a clamping block body, a clamping block contact recess, a clamping block positioning block, and a screw thread hole. The clamping block body is arranged longitudinally, the clamping block contact recess is located at the center of the lower surface of the clamping block body, the clamping block positioning block is arranged horizontally, and the clamping block positioning block is located at the center of the horizontal side surface of the clamping block body. The clamping block positioning block is coaxially arranged with a screw thread hole in the vertical direction, and the center adjustable rod can also be detachably inserted into the screw thread hole. The attachment threaded hole and the second locking threaded hole can be connected by bolts, so that the fixture positioning seat and the fixture attachment can be tightly and detachably connected. The position of the clamping block contact recess and the position of the positioning contact recess are correspondingly set vertically, so that the combination of the clamping block contact recess and the positioning contact recess can clamp the workpiece. Furthermore, the fixture positioning seat also includes a first locking threaded hole that is horizontally disposed on both sides of the longitudinal direction of the positioning seat body, and a locking slide groove that is a T-shaped groove. The first locking threaded hole and the locking slide groove are connected by bolts and T-shaped nuts, and the first locking threaded hole and the locking slide groove are locked together. Furthermore, the positioning protrusion can be inserted into the positioning groove, the lead screw threaded hole can be inserted into the lead screw and engaged with the lead screw thread, and the center adjustable rod, the clamp positioning seat, the clamp accessory and the clamping block are tightly and detachably connected together.

[0013] The apparatus described above is characterized by comprising the following steps: (1) First, the bottom surface of the fixed seat is used as the positioning surface to fit against the adjacent end face and the upper and side end faces of the machine tool workbench, and is locked to the workbench by the threaded holes and bolts on the machine tool workbench and the machine tool fixing holes on the fixed seat. (2) Position the magnetic indexing adapter through the positioning stop, the fixing seat pin hole, the positioning cylinder, the magnetic disk pin hole and the magnetic indexing plate pin hole. After it is properly placed, tighten it with bolts. (3) Insert the lead screw of the center adjustable rod into the positioning slot and connect it to the center adjustable mounting plate through the bearing and nut; (4) Turn on the magnetic switch and select the appropriate rotation angle according to the process requirements. Then, rotate the assembled magnetic indexing adapter and the center adjustable mounting plate according to the rotation angle. Through the precise cooperation of the fixture positioning seat, fixture accessories and clamping block, the mounting plate indexing and centering functions are realized. The magnetic force is adjusted and controlled by the magnetic switch to tighten the magnetic indexing adapter and the center adjustable mounting plate. (5) The screw thread hole of the clamping block is matched with the screw, and the clamping block is limited by the positioning block and the positioning slide groove. The clamping block is driven by the screw to slide to the upper part of the positioning slide groove where the screw is located. (6) After positioning the fixture positioning seat and fixture accessories through the first positioning surface and the second positioning surface, tighten them by cooperating with the second locking thread hole, the accessory thread hole and the bolt. After assembly, complete the precision positioning by cooperating with the positioning block and the positioning slide. Then, fix the fixture positioning seat and the center adjustable mounting plate by cooperating with the first locking thread hole, the locking slide, the bolt and the T-nut. (7) After the overall assembly is completed, place the part to be processed on the clamping block contact recess and the positioning contact recess and clamp it in place. Twist the screw to lock the part.

[0014] (8) If it is necessary to change the swing angle or replace the parts on the part, turn the magnetic switch, remove the parts on the part and adjust them. After the adjustment is completed, turn the switch to tighten it to complete the quick replacement or adjustment action. (9) If an eccentric action is required, the machine tool fixing hole can be turned to loosen the fixture positioning seat. Then, the upper and lower positions of the T-nuts on both sides can be adjusted along the locking slide according to the requirements. After the adjustment is completed, the nuts can be locked. (10) If it is necessary to adjust the shape of the clamping block contact recess and the positioning contact recess according to the actual shape of the processed parts, remove them and replace them with fixture accessories of appropriate shape.

[0015] The advantages and positive effects of this invention are as follows: 1. This invention improves the versatility and replacement efficiency of the device through modular and magnetic connection design. The magnetic indexing adapter in the device achieves screwless quick assembly and disassembly through strong magnetic attraction and fixing base. The operator only needs to control the magnetic switch to complete the assembly, disassembly and angle adjustment of the indexing plate; the clamping positioning base, clamping accessories and clamping block adopt standardized interfaces and detachable connections.

[0016] 2. This invention allows for quick replacement of suitable fixture components based on different workpiece shapes, eliminating the need for separate design and manufacturing of dedicated tooling for each part. This structure not only significantly reduces tooling manufacturing costs and inventory pressure but also effectively shortens production preparation time. It is suitable for processing multi-variety, small-batch research and trial-produced parts, achieving a highly efficient production mode of "one machine for multiple uses and rapid conversion".

[0017] 3. This invention features high-precision indexing and reliable centering, effectively ensuring positional consistency during multi-faceted machining of complex parts. The device employs a V-groove and positioning boss mating structure, enabling the adjustable center mounting plate to accurately embed into the corresponding slot of the magnetic indexing adapter plate, achieving precise indexing and automatic centering in the circumferential direction.

[0018] 4. This invention provides double mechanical locking through pin hole engagement and bolt tightening, ensuring that the indexing position does not shift during machining. This design eliminates the need for traditional indexing heads and other external equipment, saving machine tool workspace and avoiding cumulative errors caused by multiple clamping operations. It is suitable for high-precision wire EDM machining of complex parts with integral dividing surfaces, eccentric surfaces, or angular relationships.

[0019] 5. This invention improves clamping adaptability and processing efficiency. The center-adjustable mounting plate is equipped with a radial positioning groove, which, together with the lead screw drive mechanism, enables continuous vertical position adjustment of the clamping assembly, facilitating rapid centering and clamping of workpieces of different heights or with eccentric structures.

[0020] 6. This invention allows for easy adjustment of the fixture's vertical position along the slide groove simply by loosening the locking bolts during operation. After adjustment, the bolts can be tightened again to continue processing, eliminating the need to disassemble the entire device or readjust it. This structure expands the process range of wire EDM equipment and reduces the time spent on repeated clamping and alignment. It is particularly suitable for the efficient and high-precision machining of parts with asymmetry, multiple steps, or irregular contours.

[0021] 7. This invention, through the structural cooperation of the positioning protrusion inserting into the positioning slide groove and the lead screw threaded hole engaging with the lead screw thread, forms a coaxial and tightly connected integral structure between the center adjustable rod, the fixture positioning seat, the fixture accessories and the clamping block, ensuring the stability and concentricity of the workpiece clamping, avoiding processing deviations caused by loose connections, and is suitable for high-precision wire EDM processing.

[0022] 8. This invention supports quick replacement of fixture accessories, adjustment of swing angle, realization of eccentric machining, and replacement of clamping recesses of different shapes. It is easy to operate and flexible to adjust, significantly shortening the production preparation time. It is especially suitable for wire EDM machining of complex parts with multiple varieties and small batches. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the structural connection of the device of the present invention; Figure 2 for Figure 1 A three-dimensional schematic diagram of a structural connection of the central fixed seat; Figure 3 for Figure 1 A three-dimensional schematic diagram of a structural connection of a magnetic indexing adapter plate; Figure 4 for Figure 1 A three-dimensional schematic diagram of another structural connection of the magnetic indexing adapter plate; Figure 5 for Figure 1 A three-dimensional schematic diagram of a structural connection for a centrally adjustable mounting plate; Figure 6 for Figure 1 A three-dimensional schematic diagram of another structural connection of the center adjustable mounting plate; Figure 7 for Figure 1 An exploded view of a structural connection and assembly of a centrally adjustable mounting plate and a centrally adjustable rod; Figure 8 for Figure 1 A schematic diagram of a structural connection and assembly of a center-adjustable mounting plate and a center-adjustable rod; Figure 9 for Figure 1 A three-dimensional schematic diagram of a structural connection of a clamp positioning seat; Figure 10 for Figure 1 A three-dimensional schematic diagram of a structural connection of a clamping attachment; Figure 11 for Figure 1 A three-dimensional schematic diagram of a structural connection of the central clamping block; Figure 12 This is a three-dimensional schematic diagram of another structural connection of the device of the present invention; Figure 13 This is a three-dimensional exploded view of the structural connection of the device of the present invention; Figure 14 This is a three-dimensional schematic diagram of the structural connection between the device, parts, and machine tool of the present invention. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments. The following embodiments are descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0025] The various experimental operations involved in the specific embodiments are all conventional techniques in the field. For parts not specifically annotated in this document, those skilled in the art can refer to various commonly used reference books, scientific and technological documents or related instructions and manuals prior to the filing date of this invention to carry out the operations.

[0026] A magnetic quick-change device for wire EDM with center adjustable and calibrating function, such as... Figures 1 to 14 As shown, the device is capable of clamping parts and performing multi-face machining operations on the workpiece. The device includes a fixed base 1, a magnetic indexing adapter plate 2, a center-adjustable mounting plate 3, a center-adjustable rod 4, a fixture positioning base 5, a fixture accessory 6, and a clamping block 7. The fixed base 1, magnetic indexing adapter plate 2, and center-adjustable mounting plate 3 are sequentially connected horizontally. The center-adjustable rod 4 is vertically arranged and mounted on the upper part of the center-adjustable mounting plate 3. The lower part of the adjustable mounting plate 3 is connected to the magnetic indexing adapter plate 2. The clamping block 7, fixture accessory 6, and fixture positioning seat 5 are connected in sequence along the vertical direction and are all coaxially connected to the center adjustable rod 4. The fixed seat 1 is installed on the machine tool (not shown in the figure) and can provide stable support. The magnetic indexing adapter plate 2 can rotate and index by magnetic force. The center adjustable mounting plate 3 can provide support for the center adjustable rod 4. The fixture positioning seat 5, fixture accessory 6, and clamping block 7 can clamp and rotate the workpiece to prevent the workpiece from moving and drive the workpiece to move in the vertical direction.

[0027] This invention enhances the versatility and replacement efficiency of the device through modular and magnetic connection design. The magnetic indexing adapter in the device achieves screwless, rapid assembly and disassembly via strong magnetic attraction and a fixed base. The operator only needs to control a magnetic switch to load, unload, and adjust the angle of the indexing plate. The fixture positioning base, fixture accessories, and clamping blocks use standardized interfaces and detachable connections, allowing for quick replacement of suitable fixture components according to different workpiece shapes, eliminating the need for designing and manufacturing dedicated tooling for each part. This structure not only significantly reduces tooling manufacturing costs and inventory pressure but also effectively shortens production preparation time. It is suitable for processing multi-variety, small-batch research and prototype parts, achieving a highly efficient production mode of "one machine for multiple uses and rapid conversion."

[0028] In this embodiment, as Figure 2As shown, the fixed base 1 includes a fixed base base 1-1, a reinforcing rib 1-2, a fixed base disc 1-3, a positioning stop 1-4, a fixed base pin hole 1-5, and a fixed base threaded through hole 1-6. The fixed base base 1-1 is arranged horizontally, and its lower surface is connected to the machine tool. The fixed base disc 1-3 is arranged vertically with its central axis arranged horizontally. The fixed base disc 1-3 is connected to the horizontal side of the fixed base base 1-1 and reinforced by the reinforcing rib 1-2, so that the fixed base disc 1-3 and the fixed base base 1-1 are tightly connected. The positioning stop 1-4 is integrally and coaxially formed inside the fixed base disc 1-3, and the positioning stop 1-4 is set in the horizontal direction. The fixed base pin hole 1-5 and the fixed base threaded through hole 1-6 are both set in the horizontal direction. The fixed base pin hole 1-5 and the fixed base threaded through hole 1-6 are evenly distributed and spaced around the positioning stop 1-4 in the circumferential direction, and are all set on the fixed base disc 1-3. The fixed base pin hole 1-5 and the fixed base threaded through hole 1-6 can provide a connection interface for the magnetic indexing adapter 2, which facilitates the connection between the fixed base 1 and the magnetic indexing adapter 2 and improves the connection strength.

[0029] like Figure 3 , Figure 4As shown, the magnetic indexing adapter 2 includes a positioning cylinder 2-1, a magnetic disk 2-2, a magnetic indexing disk 2-3, a tension threaded hole 2-4, a magnetic disk pin hole 2-5, a magnetic switch 2-6, a magnetic indexing disk pin hole 2-7, and a V-groove 2-8. The magnetic disk 2-2 and the magnetic indexing disk 2-3 are connected horizontally and are coaxially and tightly detachably mounted on the outside of the positioning cylinder 2-1. The central axis of component 3 is horizontally oriented. Positioning cylinder 2-1 mates with positioning stop 1-4. The horizontal end of positioning cylinder 2-1 can be tightly and detachably inserted into positioning stop 1-4. Tensioning threaded hole 2-4 and magnetic disc pin hole 2-5 are respectively aligned with fixed seat threaded through hole 1-6 and fixed seat pin hole 1-5. Tensioning threaded hole 2-4 and fixed seat threaded through hole 1-6 can be connected by bolts (not shown in the figure) for easy fixing. The connection between the fixed seat 1 and the magnetic indexing adapter 2 is designed to enhance the connection strength; the magnetic disk 2-2 and the magnetic indexing disk 2-3 are connected magnetically; a magnetic switch 2-6 is installed on the magnetic disk 2-2, which controls the switching state of the magnetic force between the magnetic disk 2-2 and the magnetic indexing disk 2-3; the magnetic indexing disk pin hole 2-7 and the magnetic disk pin hole 2-5 are matched; the magnetic indexing disk pin hole 2-7, the magnetic disk pin hole 2-5, and the fixed seat pin are all included. Hole 1-5 can be fixedly connected by connecting pin (not shown in the figure), so that the magnetic disk 2-2, magnetic indexing disk 2-3 and fixed base 1-1 are tightly connected, improving the connection strength; V-grooves 2-8 are evenly distributed at intervals along the circumference and are located on the horizontal side of magnetic indexing disk 2-3 away from magnetic disk 2-2. V-grooves 2-8 can provide a connecting slot for center adjustable mounting disk 3, which is convenient for connecting and installing center adjustable mounting disk 3.

[0030] Preferably, the fixed base is provided with machine tool fixing holes 1-7 along the vertical direction. The machine tool fixing holes 1-7 can be fixedly connected to the machine tool by bolts to ensure stable and wobbly processing.

[0031] In this embodiment, as Figure 5 , Figure 6As shown, the center adjustable mounting plate 3 includes a mounting plate body 3-1, a locking groove 3-2, a positioning slot 3-3, a positioning groove 3-4, and positioning bosses 3-5. The mounting plate body 3-1 is arranged vertically and coaxially connected to the magnetic indexing adapter plate 2. Multiple positioning bosses 3-5 are evenly distributed and spaced along the circumference on the horizontal side surface of the mounting plate body 3-1 near the magnetic indexing adapter plate 2. The mounting plate body 3-1 can be detachably connected to the magnetic indexing adapter plate 2 via the positioning bosses 3-5. Preferably, the... The positioning boss 3-5 is matched with the V-groove 2-8, and the positioning boss 3-5 can be tightly and detachably installed in the V-groove 2-8; the positioning slide 3-4 and the locking slide 3-2 are both set on the horizontal side surface away from the magnetic indexing adapter plate 2, the positioning slide 3-4 is set in the middle, and the locking slide 3-2 is set at intervals on both sides of the longitudinal direction of the positioning slide 3-4. The positioning slide 3-4 and the positioning slot 3-3 are both set in the vertical direction, and the top of the positioning slide 3-4 is connected to the top of the mounting plate body 3-1 through the positioning slot 3-3. like Figure 7 , Figure 8 As shown, the center adjustable rod 4 includes a lead screw 4-1, a bearing 4-2, and a nut 4-3. The lead screw 4-1 is arranged vertically, and a thread is provided on the lower outer surface of the lead screw 4-1. The lower part of the lead screw 4-1 can be inserted into the positioning slot 3-3 and the positioning slide 3-4. The bearing 4-2 and the nut 4-3 are threadedly engaged with the lead screw 4-1. The bearing 4-2 and the nut 4-3 are set on the thread of the lead screw 4-1 in the positioning slide 3-4, so that the lead screw 4-1 can be fixedly installed in the positioning slide 3-4 and the extension distance can be adjusted. Thus, the center adjustable rod 4 can adjust the extension distance in the center adjustable mounting plate 3.

[0032] In this embodiment, as Figure 9 As shown, the fixture positioning seat 5 includes a positioning seat body 5-1, a first positioning surface 5-2, a positioning protrusion 5-3, and a second locking threaded hole 5-5. The positioning seat body 5-1 is arranged longitudinally, and the longitudinal two side surfaces of the positioning seat body 5-1 are set as the first positioning surface 5-2. The first positioning surface 5-2 can provide the function of installing and positioning the fixture accessories. The positioning protrusion 5-3 is installed at the center of the lower surface of the positioning seat body 5-1. The positioning protrusion 5-3 can provide the positioning function for the installation of the fixture positioning seat 5. The second locking threaded hole 5-5 is arranged vertically through the longitudinal two side surfaces of the positioning seat body 5-1. like Figure 10As shown, the fixture accessory 6 includes a fixture accessory body 6-1, a second positioning surface 6-2, an accessory threaded hole 6-3, and a positioning contact recess 6-4. The fixture accessory body 6-1 is arranged longitudinally, and the longitudinal two side surfaces of the fixture accessory body 6-1 are set as the second positioning surface 6-2. The accessory threaded hole 6-3 is arranged vertically through both sides of the fixture accessory body 6-1, and the positioning contact recess 6-4 is located at the center of the upper surface of the fixture accessory body 6-1. like Figure 11 As shown, the clamping block 7 includes a clamping block body 7-1, a clamping block contact recess 7-2, a clamping block positioning block 7-3, and a screw thread hole 7-4. The clamping block body 7-1 is arranged longitudinally, the clamping block contact recess 7-2 is located at the center of the lower surface of the clamping block body 7-1, the clamping block positioning block 7-3 is arranged horizontally, and the clamping block positioning block 7-3 is located at the center of the horizontal side surface of the clamping block body 7-1. The screw thread hole 7-4 is coaxially arranged vertically on the clamping block positioning block 7-3. The center adjustable rod 4 can also be detachably inserted into the screw thread hole 7-4 to facilitate the installation of the clamping block 7 and the center adjustable rod 4. The attachment threaded hole 6-3 and the second locking threaded hole 5-5 can be connected by bolts (not shown in the figure), so that the fixture positioning seat 5 and the fixture attachment 6 are tightly and detachably connected. The position of the clamping block contact recess 7-2 is correspondingly set to the position of the positioning contact recess 6-4, so that the combination of the clamping block contact recess 7-2 and the positioning contact recess 6-4 can clamp the workpiece, which is convenient for subsequent related operations.

[0033] Preferably, the fixture positioning seat 5 also includes a first locking threaded hole 5-4 that is horizontally disposed on both longitudinal sides of the positioning seat body 5-1, and a locking slide groove 3-2 that is a T-shaped groove. The first locking threaded hole 5-4 and the locking slide groove 3-2 are connected by bolts and T-nuts, so that the first locking threaded hole 5-4 and the locking slide groove 3-2 are locked together, which facilitates the fixing of the fixture positioning seat 5 and the center adjustable mounting plate 3.

[0034] Preferably, the positioning protrusion 5-3 can be inserted into the positioning groove 3-4, which facilitates the connection and installation of the fixture positioning seat 5 and the center adjustable mounting plate 3. The screw thread hole 7-4 can be inserted into the screw 4-1 and threadedly engaged with the screw 4-1, so that the center adjustable rod 4, the fixture positioning seat 5, the fixture accessory 6 and the clamping block 7 are tightly and detachably connected together, which facilitates the stability of the workpiece.

[0035] like Figures 12 to 14 As shown, the method of using the device as described above includes the following steps: (1) First, the bottom surface of the fixed seat 1 is used as the positioning surface and is fitted with the adjacent end face and the upper and side end faces of the machine tool workbench (not marked in the figure), and is locked with the workbench through the threaded holes and bolts on the machine tool workbench and the machine tool fixing holes 1-7 on the fixed seat 1.

[0036] (2) Position the magnetic indexing adapter plate 2 through the positioning stop 1-4, the fixing seat pin hole 1-5, the positioning cylinder 2-1, the magnetic disc pin hole 2-5 and the magnetic indexing plate pin hole 2-7. After it is properly placed, tighten it with bolts.

[0037] (3) Insert the lead screw 4-1 of the center adjustable rod 4 into the positioning slot 3-3 and connect it to the center adjustable mounting plate 3 through the bearing 4-2 and the nut 4-3.

[0038] (4) Turn on the magnetic switch 2-6 and select the appropriate rotation angle according to the process requirements. The assembled magnetic indexing adapter plate 2 and the center adjustable mounting plate 3 are precisely matched by the fixture positioning seat 5, fixture accessory 6 and clamping block 7 according to the rotation angle to realize the indexing positioning and centering function of the mounting plate. The magnetic switch 2-6 is used to adjust the control magnetic force to tighten the magnetic indexing adapter plate 2 and the center adjustable mounting plate 3.

[0039] (5) The screw thread hole 7-4 of the clamping block is matched with the screw 4-1. The clamping block is limited by the positioning block 7-3 and the positioning groove 3-4. The clamping block is driven by the screw 4-1 to slide to the upper part of the positioning groove 3-4 where the screw 4-1 is located.

[0040] (6) After positioning the fixture positioning seat 5 and the fixture accessory 6 through the first positioning surface 5-2 and the second positioning surface 6-2, tighten them by cooperating with the second locking threaded hole 5-5, the accessory threaded hole 6-3 and the bolt. After assembly, the clamping block positioning block 7-3 cooperates with the positioning slide 3-4 to complete the precision positioning. Then, the fixture positioning seat 5 and the center adjustable mounting plate 3 are fixed by cooperating with the first locking threaded hole 5-4, the locking slide 3-2, the bolt and the T-nut.

[0041] (7) After the overall assembly is completed, place the part to be processed on the clamping block contact recess 7-2 and the positioning contact recess 6-4 and clamp it in place. Twist the screw to lock the part.

[0042] (8) If it is necessary to change the swing angle or replace the parts on the part, turn the magnetic switch, remove the parts on the part and adjust them. After the adjustment is completed, turn the switch to tighten to complete the quick replacement or adjustment action.

[0043] (9) If an eccentric action is required, the machine tool fixing hole 1-7 can be turned to loosen the fixture positioning seat. Then, the upper and lower positions of the T-nuts on both sides can be adjusted along the locking slide 3-2 as needed. After the adjustment is completed, they can be locked.

[0044] (10) If it is necessary to adjust the shape of the clamping block contact recess 7-2 and the positioning contact recess 6-4 according to the actual shape of the processed parts, they can be removed and replaced with fixture accessories of appropriate shape.

[0045] This invention features high-precision indexing and reliable centering, effectively ensuring positional consistency during the multi-faceted machining of complex parts. The device employs a V-groove and positioning boss combination structure, allowing the adjustable center mounting plate to accurately embed into the corresponding slot of the magnetic indexing adapter plate, achieving precise indexing and automatic centering in the circumferential direction. Simultaneously, a double mechanical locking mechanism, through pin hole engagement and bolt tightening, ensures that the indexing position does not shift during machining. This design eliminates the need for traditional indexing heads and other external equipment, saving machine tool workspace and avoiding cumulative errors caused by multiple clamping operations. It is suitable for high-precision wire EDM machining of complex parts with integral dividing surfaces, eccentric surfaces, or angular relationships.

[0046] Although embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the scope of the invention is not limited to the contents disclosed in the embodiments.

Claims

1. A magnetic quick-change device for wire cutting with adjustable center and grading function, characterized in that: The device is capable of clamping workpieces and performing multi-face machining operations on them. The device includes a fixed base (1), a magnetic indexing adapter plate (2), a center-adjustable mounting plate (3), a center-adjustable rod (4), a fixture positioning base (5), fixture accessories (6), and a clamping block (7). The fixed base (1), magnetic indexing adapter plate (2), and center-adjustable mounting plate (3) are sequentially connected horizontally. The center-adjustable rod (4) is arranged vertically and mounted on the upper part of the center-adjustable mounting plate (3). The lower part of the adjustable mounting plate (3) is connected to the magnetic indexing adapter plate (2). The magnetic indexing adapter (2) is connected to the clamping block (7), the fixture accessory (6), and the fixture positioning seat (5) are connected in sequence along the vertical direction and are all coaxially connected to the center adjustable rod (4). The fixed seat (1) is installed on the machine tool and can provide stable support. The magnetic indexing adapter (2) can rotate and index by magnetic force. The center adjustable mounting plate (3) can provide support for the center adjustable rod (4). The fixture positioning seat (5), the fixture accessory (6), and the clamping block (7) can clamp and rotate the workpiece.

2. The apparatus according to claim 1, characterized in that: The fixed base (1) includes a fixed base base (1-1), a reinforcing rib (1-2), a fixed base disc (1-3), a positioning stop (1-4), a fixed base pin hole (1-5), and a fixed base threaded through hole (1-6). The fixed base base (1-1) is arranged horizontally, and its lower surface is connected to the machine tool. The fixed base disc (1-3) is arranged vertically with its central axis arranged horizontally. The fixed base disc (1-3) is connected to the horizontal side of the fixed base base (1-1) and reinforced by the reinforcing rib (1-2). The positioning stop (1-4) is integrally and coaxially formed inside the fixed base disc (1-3). The positioning stop (1-4) is set in the horizontal direction. The fixed base pin hole (1-5) and the fixed base threaded through hole (1-6) are both set in the horizontal direction. The fixed base pin hole (1-5) and the fixed base threaded through hole (1-6) are both evenly distributed and spaced along the circumference with the positioning stop (1-4) as the center. They are all set on the fixed base disc (1-3). The fixed base pin hole (1-5) and the fixed base threaded through hole (1-6) can provide a connection interface for the magnetic indexing adapter (2). The magnetic indexing adapter (2) includes a positioning cylinder (2-1), a magnetic disk (2-2), a magnetic indexing disk (2-3), a tension threaded hole (2-4), a magnetic disk pin hole (2-5), a magnetic switch (2-6), a magnetic indexing disk pin hole (2-7), and a V-groove (2-8). The magnetic disk (2-2) and the magnetic indexing disk (2-3) are connected horizontally and are coaxially and tightly detachably mounted on the positioning cylinder (2-1). 1) In addition, the central axes of the positioning cylinder (2-1), magnetic disk (2-2), and magnetic indexing disk (2-3) are all set in the horizontal direction. The positioning cylinder (2-1) is set to cooperate with the positioning stop (1-4). The horizontal end of the positioning cylinder (2-1) can also be tightly and detachably inserted into the positioning stop (1-4). The tensioning threaded hole (2-4) and the magnetic disk pin hole (2-5) are respectively connected to the fixed seat threaded through hole (1-6) and the fixed seat pin hole. (1-5) are designed to be aligned and fitted together. The tension threaded hole (2-4) and the fixed seat threaded through hole (1-6) can be connected by bolts. The magnetic disk (2-2) and the magnetic indexing disk (2-3) are connected by magnetism. The magnetic switch (2-6) is installed on the magnetic disk (2-2). The magnetic switch can control the switching state of the magnetism between the magnetic disk (2-2) and the magnetic indexing disk (2-3). The pin hole (2-7) of the magnetic indexing disk... The magnetic indexing plate pin hole (2-7), the magnetic disc pin hole (2-5), and the fixing seat pin hole (1-5) are configured to cooperate with the magnetic disc pin hole (2-7), the magnetic disc pin hole (2-5), and the fixing seat pin hole (1-5) can be fixedly connected by connecting pins; several V-grooves (2-8) are evenly distributed at intervals along the circumference and are set on the horizontal side of the magnetic indexing plate (2-3) away from the magnetic disc (2-2). The V-grooves (2-8) can provide a connecting slot for the center adjustable mounting plate (3).

3. The apparatus according to claim 2, characterized in that: The fixed base is provided with machine tool fixing holes (1-7) along the vertical direction. The machine tool fixing holes (1-7) can be fixedly connected to the machine tool by bolts.

4. The apparatus according to claim 2, characterized in that: The centrally adjustable mounting plate (3) includes a mounting plate body (3-1), a locking groove (3-2), a positioning slot (3-3), a positioning groove (3-4), and positioning bosses (3-5). The mounting plate body (3-1) is arranged vertically and is coaxially connected to the magnetic indexing adapter plate (2). Multiple positioning bosses (3-5) are evenly distributed and spaced along the circumference on the horizontal side surface of the mounting plate body (3-1) near the magnetic indexing adapter plate (2). The mounting plate body (3-1) can be detachably connected to the magnetic indexing adapter plate (2) via the positioning bosses (3-5). The platform (3-5) is matched with the V-groove (2-8), and the positioning boss (3-5) can be tightly and detachably installed in the V-groove (2-8); the positioning slide (3-4) and the locking slide (3-2) are both set on the horizontal side surface away from the magnetic indexing adapter plate (2), the positioning slide (3-4) is set in the middle, and the locking slide (3-2) is set at intervals on both sides of the longitudinal direction of the positioning slide (3-4). The positioning slide (3-4) and the positioning slot (3-3) are both set in the vertical direction. The top of the positioning slide (3-4) is connected to the top of the mounting plate body (3-1) through the positioning slot (3-3). The center adjustable rod (4) includes a lead screw (4-1), a bearing (4-2), and a nut (4-3). The lead screw (4-1) is arranged in a vertical direction. The lower part of the lead screw (4-1) is provided with a thread on its outer surface. The lower part of the lead screw (4-1) can be inserted into the positioning slot (3-3) and positioned in the positioning slide (3-4). The bearing (4-2) and the nut (4-3) are threadedly engaged with the lead screw (4-1). The bearing (4-2) and the nut (4-3) are set on the thread of the lead screw (4-1) in the positioning slide (3-4). The lead screw (4-1) can be fixedly installed in the positioning slide (3-4) and the extension distance can be adjusted. The center adjustable rod (4) can adjust the extension distance in the center adjustable mounting plate (3).

5. The apparatus according to claim 1, characterized in that: The fixture positioning seat (5) includes a positioning seat body (5-1), a first positioning surface (5-2), a positioning protrusion (5-3), and a second locking threaded hole (5-5). The positioning seat body (5-1) is arranged longitudinally, and the longitudinal two side surfaces of the positioning seat body (5-1) are set as the first positioning surface (5-2). The first positioning surface (5-2) can provide the function of installation positioning for the fixture accessories. The positioning protrusion (5-3) is installed at the center of the lower surface of the positioning seat body (5-1). The positioning protrusion (5-3) can provide the positioning function for the installation of the fixture positioning seat (5). The second locking threaded hole (5-5) is arranged vertically through the longitudinal two side surfaces of the positioning seat body (5-1). The clamp accessory (6) includes a clamp accessory body (6-1), a second positioning surface (6-2), an accessory threaded hole (6-3), and a positioning contact recess (6-4). The clamp accessory body (6-1) is arranged longitudinally, and the longitudinal two side surfaces of the clamp accessory body (6-1) are set as the second positioning surface (6-2). The accessory threaded hole (6-3) is arranged vertically through both sides of the clamp accessory body (6-1), and the positioning contact recess (6-4) is located at the center of the upper surface of the clamp accessory body (6-1). The clamping block (7) includes a clamping block body (7-1), a clamping block body (7-1), and a clamping block body (7-2). The clamping block has a contact recess (7-2), a positioning block (7-3), and a screw thread hole (7-4). The clamping block body (7-1) is arranged longitudinally. The clamping block contact recess (7-2) is located at the center of the lower surface of the clamping block body (7-1). The clamping block positioning block (7-3) is arranged horizontally. The clamping block positioning block (7-3) is located at the center of the horizontal side surface of the clamping block body (7-1). The screw thread hole (7-4) is coaxially arranged vertically on the clamping block positioning block (7-3). The center adjustable rod (4) can also be detachably inserted into the screw thread hole (7-4). The attachment threaded hole (6-3) and the second locking threaded hole (5-5) can be connected by bolts (not shown in the figure) to make the fixture positioning seat (5) and the fixture attachment (6) tightly and detachably connected. The position of the clamping block contact recess (7-2) and the position of the positioning contact recess (6-4) are correspondingly arranged vertically to make the clamping block contact recess (7-2) and the positioning contact recess (6-4) able to clamp the workpiece.

6. The apparatus according to claim 5, characterized in that: The fixture positioning seat (5) also includes a first locking threaded hole (5-4) which is horizontally disposed on both sides of the longitudinal direction of the positioning seat body (5-1). The locking slide groove (3-2) is a T-shaped groove. The first locking threaded hole (5-4) and the locking slide groove (3-2) are connected by bolts and T-nuts. The first locking threaded hole (5-4) and the locking slide groove (3-2) are locked together.

7. The apparatus according to claim 5, characterized in that: The positioning protrusion (5-3) can be inserted into the positioning groove (3-4), the screw thread hole (7-4) can be inserted into the screw (4-1) and threadedly engaged with the screw (4-1), and the center adjustable rod (4), the clamp positioning seat (5), the clamp accessory (6) and the clamping block (7) are tightly and detachably connected together.

8. The apparatus according to any one of claims 1 to 6, characterized in that: Includes the following steps: (1) First, the bottom surface of the fixed seat (1) is used as the positioning surface to fit with the adjacent end face and the upper and side end faces of the machine tool workbench, and is locked with the workbench through the threaded holes and bolts on the machine tool workbench and the machine tool fixing holes (1-7) on the fixed seat (1). (2) Position the magnetic indexing adapter plate (2) through the positioning stop (1-4), the fixing seat pin hole (1-5), the positioning cylinder (2-1), the magnetic disk pin hole (2-5), and the magnetic indexing plate pin hole (2-7). After it is properly placed, tighten it with bolts. (3) Insert the lead screw (4-1) of the center adjustable rod (4) into the positioning slot (3-3) and connect it to the center adjustable mounting plate (3) through the bearing (4-2) and nut (4-3); (4) Turn on the magnetic switch (2-6) and select the appropriate rotation angle according to the process requirements. The assembled magnetic indexing adapter (2) and the center adjustable mounting plate (3) are precisely matched by the fixture positioning seat (5), fixture accessories (6) and clamping block (7) according to the rotation angle to realize the indexing positioning and centering function of the mounting plate. The magnetic switch (2-6) is used to adjust and control the magnetic force to tighten the magnetic indexing adapter (2) and the center adjustable mounting plate (3). (5) The screw thread hole (7-4) of the clamping block is matched with the screw (4-1). The clamping block is limited by the positioning block (7-3) and the positioning groove (3-4). The clamping block is driven by the screw (4-1) to slide to the upper part of the positioning groove (3-4) where the screw (4-1) is located. (6) After positioning the fixture positioning seat (5) and fixture accessory (6) through the first positioning surface (5-2) and the second positioning surface (6-2), tighten them by cooperating with the second locking thread hole (5-5), accessory thread hole (6-3) and bolt. After assembly, complete the precision positioning by cooperating with the positioning slot (3-4) through the clamping block positioning block (7-3). Then, fix the fixture positioning seat (5) and the center adjustable mounting plate (3) by cooperating with the first locking thread hole (5-4), locking slot (3-2), bolt and T-nut. (7) After the overall assembly is completed, place the parts to be processed on the clamping block contact recess (7-2) and the positioning contact recess (6-4) and clamp them in place. Twist the screw to lock the parts. (8) If it is necessary to change the swing angle or replace the parts on the part, turn the magnetic switch, remove the parts on the part and adjust them. After the adjustment is completed, turn the switch to tighten it to complete the quick replacement or adjustment action. (9) If an eccentric action is required, the machine tool fixing hole (1-7) can be turned to loosen the fixture positioning seat. Then, the upper and lower positions of the T-nuts on both sides can be adjusted along the locking slide groove (3-2) as needed. After the adjustment is completed, the nuts can be locked. (10) If it is necessary to adjust the shape of the clamping block contact recess (7-2) and the positioning contact recess (6-4) according to the actual shape of the processed parts, remove them and replace them with fixture accessories of appropriate shape.

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