A processing technology for integrated welding mold of multi-cavity structural parts

Abstract

The present invention relates to the field of laser beam processing technology, and discloses a processing technology for an integrated welding mold for a multi-cavity structural part, including S1: design and drawing: according to the requirements of the multi-cavity structural part, design the structure and size of the welding mold, draw a two-dimensional model and a three-dimensional model, and determine the material and processing technology of the mold; S2: material preparation and processing: according to the design requirements, select suitable mold materials, and perform cutting, drilling, and milling to produce various components of the mold. The invention is provided with an electrode block, and the feed adjustment part drives the fixed block to move upward. When the fixed block moves upward, the stepper motor starts to rotate ninety degrees. After an electrode block outside the fixed shaft completes the electrospark machining, it is quickly flipped so that the next electrode block enters the electrospark machining position. The time for the electrode block to change shape after being worn to a certain extent is four times the original time, which greatly reduces the damage and replacement frequency of the electrode block.

Description

Technical Field

[0001] The invention relates to the technical field of laser beam processing, and in particular to a processing technology of an integrated welding mold for a multi-cavity structural part. Background Art

[0002] The mold provides the basis for the manufacturing of parts of multi-cavity structural parts. Integrated welding combines these parts manufactured by the mold into the final multi-cavity structural parts. The mold after heat treatment is finely milled. During fine milling, it is necessary to select appropriate milling cutters, cutting parameters, etc. to ensure processing accuracy and quality. However, for some molds with complex shapes, such as molds for integrated welding of multi-cavity structural parts, EDM can be used for processing. EDM uses the discharge phenomenon between the electrode and the mold to remove the mold material and process the required shape and size.

[0003] During the EDM process, the electrode will inevitably be worn out due to the corrosion of the spark. As the processing continues, the electrode size continues to decrease. If only one size of electrode is used, when the electrode is worn out to a certain extent, the electrode shape changes, and the size of the mold cavity processed subsequently will deviate and fail to meet the design requirements, especially when processing molds with complex shapes. In order to compensate for the impact of electrode wear on processing accuracy, it is often necessary to prepare electrodes of multiple sizes and specifications. After the electrode is worn out to a certain extent, it is promptly replaced with other electrodes for continued processing to ensure that the dimensional accuracy of each part of the cavity meets the requirements. However, due to the different positions, depths, and opening sizes of each cavity in the multi-cavity structure, the number of times the electrode processing is required is relatively high. During the welding process, it may be necessary to replace the electrode. Replacing the electrode requires shutting down the processing equipment, loosening the fixing device, carefully removing the electrode, and positioning and installing the new electrode. In view of this, we provide a processing technology for an integrated welding mold for multi-cavity structural parts. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a processing technology for an integrated welding mold for a multi-cavity structural part, which can effectively solve the problem in the prior art that the processing loss of a single electrode seriously affects the processing accuracy and the replacement is cumbersome.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a processing technology for an integrated welding mold for a multi-cavity structural part, comprising:

[0009] S1: Design and drawing: According to the requirements of multi-cavity structural parts, design the structure and size of the welding mold, draw two-dimensional and three-dimensional models, and determine the material and processing technology of the mold;

[0010] S2: Material preparation and processing: According to the design requirements, select the appropriate mold material, and perform cutting, drilling, and milling to produce various parts of the mold;

[0011] S3: Rough machining:

[0012] Milling: Use a milling machine to mill the mold material after cutting, remove most of the excess, and process the basic shape and contour of the mold;

[0013] Drilling: Drill holes on the mold according to the requirements of the design drawings to install mold parts, positioning pins, etc.

[0014] Rough grinding: Rough grinding is performed on the mold after milling and drilling to remove surface defects such as burrs and knife marks, and to improve the surface flatness and finish of the mold;

[0015] S4: Heat treatment:

[0016] Quenching: quench the mold after rough processing to improve the hardness and strength of the mold;

[0017] Tempering: The mold needs to be tempered after quenching to eliminate quenching stress and improve the toughness and plasticity of the mold;

[0018] S5: Finishing:

[0019] Finishing milling: Finishing milling is performed on the mold after heat treatment to further improve the dimensional accuracy and surface quality of the mold;

[0020] Electrospark machining: Electrospark machining equipment is used to process the complex shapes of molds;

[0021] Fine grinding: Fine grinding is performed on the mold after fine milling and EDM, so that the surface roughness of the mold meets the design requirements;

[0022] S6: Surface treatment: Treat the surface of the mold, such as grinding, polishing, and painting, to improve the surface quality and wear resistance of the mold;

[0023] S7: Assembly and debugging: Assemble the qualified mold parts according to the requirements of the design drawings and debug the assembled molds;

[0024] S8: Inspection and testing: Test the performance of the welding mold, such as the strength, hardness, wear resistance, demoulding performance of the mold, and whether the test results meet the design requirements;

[0025] Wherein, the EDM equipment described in S5 comprises a machine tool body, a feed adjustment part is fixedly connected to the side of the machine tool body, a clamping part is arranged on one side of the feed adjustment part, the clamping part comprises a fixed block fixedly connected to the bottom end of the feed adjustment part, a stepping motor for intermittent rotation is arranged on the outer side of the fixed block, a positioning group is arranged on the inner side of the fixed block, an electrode member for EDM is arranged on the inner side of the positioning group, the electrode member comprises an electrode block rotatably connected to the inner wall of the fixed block, the outer end of the electrode block is transmission-connected to the output end of the stepping motor, and a fixed shaft is evenly fixed on the outer side of the electrode block;

[0026] Wherein, the positioning group includes a cleaning member for cleaning the surface of the fixed shaft and positioning the side of the fixed shaft.

[0027] Furthermore, the positioning group also includes a symmetrically arranged positioning frame, which is fixedly connected to the top of the inner wall of the fixed block, and a cleaning side plate is flexibly connected to the opposite side of the positioning frame. A movable groove is opened at the top of the positioning frame, and a cleaning piece is arranged inside the movable groove, and the cleaning pieces are arranged relatively.

[0028] Furthermore, a stepper motor is arranged on the outer side of the middle part of the fixed block, the output end of the stepper motor is fixedly connected to the outer end of the electrode member, a limiting member is arranged between the inner wall of the fixed block and the positioning frame, the electrode member includes an electrode block fixedly connected to the output end of the stepper motor, both ends of the electrode block pass through the middle part of the positioning frame, and the electrode block is fixedly connected to the outer side of the fixed shaft.

[0029] Furthermore, the limit member includes a rotating plate fixedly connected to both ends of the electrode block, the other end of the rotating plate is rotatably connected to the inner wall of the fixed block, the outer side of the rotating plate is engaged with a limit block, the other end of the limit block is movably connected to a rotating shaft, and the rotating shaft is fixedly connected to the inner wall of the fixed block.

[0030] Furthermore, a limiting groove is opened on the inner side of the movable groove, a telescopic spring is elastically connected to the inner wall of the limiting groove, a positioning piece is arranged at the other end of the telescopic spring, the positioning piece comprises a magnetic block 2 which is slidably connected to the inner wall of the limiting groove, a connecting plate is fixedly connected to the middle part of the outer side of the magnetic block 2, and a ring block 1 is fixedly connected to the other end of the connecting plate.

[0031] Furthermore, a ring block 2 is fixedly connected to the other end of the inner wall of the movable groove, and the ring block 2 and the ring block 1 are engaged with each other on the side facing each other. The inner wall of the ring block 2 is rotatably connected to the outer end of one of the cleaning members, and the two ends of the other cleaning member are rotatably connected to the inner wall of the movable groove on one side close to the limiting groove.

[0032] Furthermore, the cleaning member comprises a main shaft rotatably connected to the inner wall of the movable groove, a middle portion of the main shaft passes through a counterweight block, and a cleaning brush plate is fixedly connected to the inside of the counterweight block.

[0033] Furthermore, two ends of the main shaft close to one side of the limiting groove are fixedly connected with magnetic block 1, and the magnetic block 1 is magnetically connected to the outer side of magnetic block 2. Beneficial Effects

[0034] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0035] The present invention is provided with an electrode block, a feed adjustment part drives the fixed block to move downward, the fixed block drives the positioning group to move downward synchronously, the positioning group drives the electrode part to move downward synchronously, the fixed shaft moves downward to perform electrospark machining on the mold placed in the machine tool body, after completing one machining, the feed adjustment part drives the fixed block to move upward, while the fixed block moves upward, the stepper motor starts to rotate ninety degrees, driving the fixed shaft that has been electrospark machined once to rotate, so that the electrode block to be machined next time is located in the direction facing the working platform, after an electrode block outside the fixed shaft completes electrospark machining, it is quickly flipped so that the next electrode block enters the electrospark machining position, and the time it takes for the electrode block to be worn to a certain extent and change its shape is four times that of the original time, which greatly shortens the damage and replacement frequency of the electrode block.

[0036] The present invention is provided with a cleaning side plate and a cleaning member. The bottom end height of the cleaning side plate is flush with the top end height of the electrode block in the horizontal position, and the cleaning side plate is in contact with the side edge of the electrode block, so as to effectively clean the side edge of the electrode block after processing, and clean the substances generated by the decomposition of the working fluid during the discharge process and the new compound layer formed on the surface of the electrode block. The electrode block subjected to electrospark processing first contacts the inclined surface of the cleaning brush plate, and the cleaning brush plate is driven by the force to drive the counterweight block fixedly connected thereto to rotate around the main shaft. The bottom end of the cleaning brush plate is always in contact with the surface of the electrode block, so as to clean the surface of the electrode block in all directions.

[0037] The present invention provides a limiting member and a positioning member with two state changes, which further ensures that the rotation angle of the electrode block will not change due to inertia after rotation, thereby improving the accuracy of the rotation angle of the electrode block in the fixed block. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 This is a schematic diagram of the process flow of an integrated welding mold for a multi-cavity structural member according to an embodiment of the present invention;

[0040] Figure 2It is a schematic diagram of the overall structure of the electric spark machining equipment according to an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the overall structure of the clamping part of an embodiment of the present invention;

[0042] Figure 4 It is a schematic diagram of the structure of the fixed block in the separated state of the clamping part according to an embodiment of the present invention;

[0043] Figure 5 It is a schematic diagram of the structure of the positioning group of the clamping part in the separated state according to an embodiment of the present invention;

[0044] Figure 6 It is a schematic diagram of the structure of the electrode member and the limit member in the separation state of the clamping part according to an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the positioning state of the limiter according to an embodiment of the present invention;

[0046] Figure 8 It is a schematic diagram of the connection structure of the movable groove and the positioning frame according to an embodiment of the present invention;

[0047] Fig. 9 This is a schematic diagram of the overall structure of a cleaning member according to an embodiment of the present invention;

[0048] Fig.10 A schematic diagram of the internal structure of the movable slot according to an embodiment of the present invention;

[0049] Fig.11 For the embodiment of the present invention Fig.10 A schematic diagram of the enlarged structure in the middle.

[0050] The numbers in the figure represent: 1. machine tool body; 2. feed adjustment part; 3. clamping part; 31. fixed block; 311. stepping motor; 32. electrode part; 321. fixed shaft; 322. electrode block; 33. positioning group; 331. positioning frame; 332. cleaning side plate; 333. cleaning part; 3331. cleaning brush plate; 3332. counterweight block; 3333. spindle; 3334. magnetic block one; 335. positioning part; 3351. ring block one; 3352. connecting plate; 3353. magnetic block two; 336. movable groove; 337. limiting groove; 338. telescopic spring; 339. ring block two; 34. limiting part; 341. rotary plate; 342. limiting block; 343. rotating shaft. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The present invention will be further described below in conjunction with the embodiments. Example

[0053] See also Figure 1-Figure 11 The present invention provides a processing technology solution for an integrated welding mold for a multi-cavity structural part, comprising the following steps:

[0054] S1: Design and drawing: According to the requirements of multi-cavity structural parts, design the structure and size of the welding mold, draw two-dimensional and three-dimensional models, and determine the material and processing technology of the mold;

[0055] S2: Material preparation and processing: According to the design requirements, select the appropriate mold material, and perform cutting, drilling, and milling to produce various parts of the mold;

[0056] S3: Rough machining:

[0057] Milling: Use a milling machine to mill the mold material after cutting, remove most of the excess, and process the basic shape and contour of the mold;

[0058] Drilling: Drill holes on the mold according to the requirements of the design drawings to install mold parts, locating pins, etc.

[0059] Rough grinding: Rough grinding is performed on the mold after milling and drilling to remove surface defects such as burrs and knife marks, and to improve the surface flatness and finish of the mold;

[0060] S4: Heat treatment:

[0061] Quenching: quench the mold after rough processing to improve the hardness and strength of the mold;

[0062] Tempering: The mold needs to be tempered after quenching to eliminate quenching stress and improve the toughness and plasticity of the mold;

[0063] S5: Finishing:

[0064] Finishing milling: Finishing milling is performed on the mold after heat treatment to further improve the dimensional accuracy and surface quality of the mold;

[0065] Electrospark machining: Electrospark machining equipment is used to process the complex shapes of molds;

[0066] Fine grinding: Fine grinding is performed on the mold after fine milling and EDM, so that the surface roughness of the mold meets the design requirements;

[0067] S6: Surface treatment: Treat the surface of the mold, such as grinding, polishing, and painting, to improve the surface quality and wear resistance of the mold;

[0068] S7: Assembly and debugging: Assemble the qualified mold parts according to the requirements of the design drawings and debug the assembled molds;

[0069] S8: Inspection and testing: Test the performance of the welding mold, such as the strength, hardness, wear resistance, and demoulding performance of the mold, and check whether the test results meet the design requirements.

[0070] Among them, the EDM equipment mentioned in S5 is as follows Figure 2 As shown, reference Figure 2 and Figure 3 The device includes a machine tool body 1, a feed adjustment part 2 and a clamping part 3. The feed adjustment part 2 is fixedly connected to the top of the machine tool body 1, and the clamping part 3 is fixedly connected to the bottom of the feed adjustment part 2. The clamping part 3 includes a fixed block 31 connected to the bottom of the feed adjustment part 2. A positioning group 33 is fixedly connected to the top of the inner wall of the fixed block 31. An electrode member 32 is arranged inside the positioning group 33. A limiting member 34 is arranged in the space between the outer side of the positioning group 33 and the inner wall of the fixed block 31.

[0071] refer to Figure 4 , Figure 6 and Figure 7The cam 342 is a substantially parallelogram of the cam 341 and the cam 343 is a substantially parallelogram of the cam 342. The cam 342 is a substantially parallelogram of the cam 342 and the cam 343 is a substantially parallelogram of the cam 342. The rotation axis 343 at the three-divided position rotates as the center, so the rotation path of the limit block 342 is an approximately elliptical curve. The limit block 342 rotates clockwise at a corresponding angle as the rotary plate 341 rotates counterclockwise, and the limit block 342 immediately stops fitting with the inner wall of the arc groove until the limit block 342 rotates counterclockwise by ninety degrees, and the limit block 342 contacts another arc groove. The knob spring elastically recovers to drive the rotation axis 343 to rotate in the opposite direction, and the rotation axis 343 drives the limit block 342 to rotate in the opposite direction. The elliptical curve of the rotation of the limit block 342 makes the surface of the limit block 342 fit closely with the middle position of the arc groove of the rotary plate 341, and a certain pressure is applied under the action of the knob spring, thereby improving the stability of the intermittent rotation and the degree of limiting pressure on the rotary plate 341, improving the position stability of the rotary plate 341, and avoiding the rotation position deviation of the rotary plate 341. At the same time, the installation clearance between the limit block 342 and the rotary plate 341 is simple and the installation difficulty is low. When the rotary plate 341 swings clockwise, a stopper is fixedly provided on the inner wall of the fixed block 31 to limit the limit block 342. The stopper prevents the limit block 342 for limiting the rotary plate 341 from rotating in the reverse direction. The limit block 342 prevents the rotary plate 341 from rotating clockwise and keeps it still, and this reciprocating process ensures the accuracy of the intermittent motion of the rotary plate 341.

[0072] The two rotary plates 341 are provided with a card slot on one side opposite to the other, and the inner side of the card slot is fixedly connected to the two ends of the electrode block 322, and a plurality of electrode blocks 322 are fixedly connected to the outer side of the electrode block 322, which is set to four here, and the feed adjustment unit 2 drives the fixed block 31 to move downward, and the fixed block 31 drives the positioning group 33 to move downward synchronously, and the positioning group 33 drives the electrode member 32 to move downward synchronously, and the fixed shaft 321 moves downward to perform electrospark machining on the mold placed in the machine tool body 1. After completing one machining, the feed adjustment unit 2 drives the fixed block 31 to move upward, and the stepper motor 311 starts to rotate ninety degrees while the fixed block 31 moves upward, driving the fixed shaft 321 that has been electrospark machined once to rotate, so that the electrode block 322 for the next machining is located in the direction facing the working platform, and after an electrode block 322 outside the fixed shaft 321 completes the electrospark machining, it is quickly flipped over so that the next electrode block 322 enters the electrospark machining position. Due to the erosion of the electric spark, although it will Losses are inevitable, but the processing of a single electrode block 322 of the present invention is once in four processing steps. As the processing continues, the number of uses of a single electrode block 322 is reduced to one-fourth of the original times, and the time it takes for the electrode block 322 to wear out to a certain extent and change its shape is four times the original time, which greatly shortens the frequency of damage and replacement of the electrode block 322. The size of the mold cavity subsequently processed by the electrode block 322 with minor damage will meet the design requirements, especially when processing molds with complex shapes. The converted electrode block 322 can well compensate for the influence of the electrode block 322 loss on the processing accuracy, and avoid the situation where the tip or edge of the electrode block 322 wears out too quickly, the size and shape of the corresponding parts of the processed mold deviate, the surface roughness does not meet the requirements, and obvious processing marks appear on the surface of the processed mold, such as discharge potholes and stripes, making the surface too rough, etc.

[0073] refer to Figure 4 , Figure 5 and Figure 6 The positioning group 33 includes a hexagonal positioning frame 331, the positioning frame 331 is symmetrically arranged, and the top of the positioning frame 331 is fixedly connected to the top of the inner wall of the fixed block 31, and the middle of the positioning frame 331 is flexibly connected with a cleaning side plate 332, and the bottom end height of the cleaning side plate 332 is flush with the top height of the electrode block 322 in the horizontal position, and the cleaning side plate 332 is in contact with the side of the electrode block 322, which can effectively clean the side of the processed electrode block 322, and clean the substances produced by the decomposition of the working fluid during the discharge process and the new compound layer formed on the surface of the electrode block 322.

[0074] However, if the electro-erosion products generated during the EDM process are not removed in time, they will cause secondary discharge between the electrode block 322 and the workpiece during the next EDM process, thereby changing the discharge path, causing the processed shape of the mold to deviate from the designed shape, and the surface finish of the electrode block 322 will also affect the surface roughness of the mold. If there are tiny impurities on the electrode surface that are not removed, they will be copied to the mold surface during the discharge process. Therefore, cleaning members 333 are symmetrically arranged at the top positions of the two positioning frames 331 to clean the processed surface of the electrode block 322.

[0075] refer to Figure 5 , Figure 8 and Fig. 9 The cleaning member 333 includes a main shaft 3333 embedded in the movable groove 336 at both ends. The movable groove 336 is located on one side of the top of the positioning frame 331. A counterweight block 3332 is fixedly connected to the outer side of the cleaning brush plate 3331 to achieve the purpose of increasing the surface mass distribution of the cleaning brush plate 3331. The overall mass distribution of the cleaning brush plate 3331 has changed, which is equivalent to increasing the effective mass of the part rotating around the main shaft 3333, so that the rotational inertia of the entire system is increased. The main shaft 3333 runs through the middle of the counterweight block 3332, and the two ends of the main shaft 3333 are rotatably connected to the inner wall of the movable groove 336. The two cleaning brush plates 3331 are symmetrically arranged. The electrode block 322 that is subjected to electrospark machining first contacts the inclined surface of the cleaning brush plate 3331 first. The cleaning brush plate 3331 is driven by the force to drive the counterweight block 3332 fixedly connected thereto to rotate around the main shaft 3333. The bottom end of the cleaning brush plate 3331 is always in contact with the surface of the electrode block 322, so that the surface of the electrode block 322 can be cleaned in all directions.

[0076] Since the discharge machining is carried out by etching in the discharge gap between the electrode block 322 and the workpiece, and the electrode block 322 needs to be rotated to change the angle, if the clamping and positioning accuracy of the electrode member 32 is insufficient, the mold shape accuracy will be reduced. In order to ensure that the positioning accuracy of the electrode block 322 is sufficient after the fixed shaft 321 rotates, in addition to setting a limit member 34 for accurately positioning the rotation angle, a positioning member 335 is also provided to further ensure that the electrode block 322 will not change the rotation angle due to inertia after rotation, thereby improving the accuracy of the rotation angle of the electrode block 322 in the fixed block 31.

[0077] refer to Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11First, a cleaning brush plate 3331 that contacts the electrode block 322 is fixedly sleeved with a magnetic block 3334 at both ends. After the counterweight block 3332 is sleeved in the middle of the cleaning brush plate 3331, the overall mass distribution of the cleaning brush plate 3331 changes, which is equivalent to increasing the effective mass of the rotating part, increasing the rotational inertia of the entire system. After the counterweight block 3332 is sleeved, a larger torque needs to be applied to make it start to rotate, which makes the rotation relatively slow. A limiting groove 337 is provided on the side of the inner side of the movable groove 336 close to the magnetic block 3334. A telescopic spring 338 is elastically connected to the inner wall of the limiting groove 337 close to the magnetic block 3334. A positioning member 335 is provided in the middle of the movable groove 336. The positioning member 335 is provided with a positioning member 336. 35 includes a second magnetic block 3353 which is slidably connected to the limiting groove 337, and the outer side of the second magnetic block 3353 is magnetically connected to the outer side of the first magnetic block 3334, and the magnetic directions of the two are the same. In the initial state, the first magnetic block 3334 is not located in the magnetic field space of the second magnetic block 3353, and the other end of the second magnetic block 3353 is fixedly connected to a connecting plate 3352, and the other end of the connecting plate 3352 is fixedly connected to a ring block 3351, and the other end of the inner wall of the movable groove 336 is fixedly connected to a second ring block 339, and a snap-fitting structure is provided on the opposite side of the ring block 339 and the ring block 3351, and the two can form a complete circular ring when snap-fitting and plugged. The circular ring can limit the other cleaning member 333, and the friction between the two when snap-fitting and plugged is less than the elastic restoring force of the telescopic spring 338.

[0078] After an electrode block 322 that has completed electrospark machining rotates ninety degrees, the working fluid on the side of the electrode block 322 passes through the cleaning side plate 332 to clean the side, and then continues to rotate ninety degrees. During this process, the electrode block 322 contacts the cleaning brush plate 3331, and the electrode block 322 applies a force to the cleaning brush plate 3331. The cleaning brush plate 3331 drives the main shaft 3333 to rotate in the movable groove 336, and the cleaning brush plate 3331 drives the magnetic block 1 3334 to rotate. When the magnetic block 1 3334 rotates to the magnetic field space of the magnetic block 2 3353, the electrode block 322 continues to rotate until the side contacts another cleaning brush plate 3331. During this process, the cleaning brush plate 3331 that is in contact with the surface of the electrode block 322 no longer rotates. As the electrode block 322 rotates, the cleaning brush plate 3331 cleans its surface, thereby achieving the purpose of comprehensively cleaning the surface of the electrode block 322 after processing.

[0079] At the same time, since the magnetic block 1 3334 rotates to the magnetic field space of the magnetic block 2 3353, the magnetic block 1 3334 repels the magnetic block 2 3353, and the magnetic block 2 3353 slides along the limiting groove 337. At this time, the telescopic spring 338 is elastically deformed, and the magnetic block 2 3353 drives the connecting plate 3352 fixedly connected thereto to slide in the movable groove 336, and the connecting plate 3352 drives the ring block 1 3351 fixedly connected thereto to slide in the movable groove 336 until the ring block 1 3351 and the ring block 2 339 are engaged and plugged, and the ring block 1 3351 and the ring block 2 339 are closed to limit and fix the main shaft 3333 at the top of the other cleaning brush plate 3331. At this time, the cleaning brush plate 3331 that cannot be rotated and maintained in a vertical state hinders the rotating electrode block 322 to avoid the electrode block 322 rotating at an angle that is too large to meet the requirements. The electrode block 322 is not parallel to the surface of the workpiece, which may cause local depression or protrusion on the curved surface, and cannot meet the mold forming requirements.

[0080] After the cleaning brush plate 3331 finishes cleaning the surface of the electrode block 322, the cleaning brush plate 3331, which is not affected by external force, slowly rotates in the opposite direction on the counterweight block 3332. In the early stage of rotation, the magnetic block 1 3334 is still located in the magnetic field space of the magnetic block 2 3353, and the other cleaning brush plate 3331 still hinders the rotating electrode block 322. In the later stage of rotation, the magnetic block 1 3334 is no longer located in the magnetic field space of the magnetic block 2 3353, and the elastic deformation of the telescopic spring 338 is restored, and the telescopic spring 338 drives the fixedly connected magnetic block The second 3353, the connecting plate 3352 and the ring block one 3351 slide in opposite directions, the ring block one 3351 and the ring block two 339 are no longer closed, the other cleaning brush plate 3331 no longer hinders the rotating electrode block 322, and the other main shaft 3333 returns to a rotatable state, and in the subsequent rotation process of the electrode block 322, it rotates along with the electrode block 322. Through the change of the two states of the cleaning member 333, the surface of the electrode block 322 can be cleaned, and the rotating electrode block 322 can be angle-limited to ensure the accuracy of its rotation.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A processing technology for an integrated welding mold for a multi-cavity structural part, characterized in that: include: S1: Design and drawing: According to the requirements of multi-cavity structural parts, design the structure and size of the welding mold, draw two-dimensional and three-dimensional models, and determine the material and processing technology of the mold; S2: Material preparation and processing: According to the design requirements, select the appropriate mold material, and perform cutting, drilling, and milling to produce various parts of the mold; S3: Rough machining: Milling: Use a milling machine to mill the mold material after cutting, remove most of the excess, and process the basic shape and contour of the mold; Drilling: Drill holes on the mold according to the requirements of the design drawings to install mold parts and positioning pins; Rough grinding: Rough grinding is performed on the mold after milling and drilling to remove burrs and knife marks on the surface and improve the surface flatness and finish of the mold; S4: Heat treatment: Quenching: quench the mold after rough processing to improve the hardness and strength of the mold; Tempering: The mold needs to be tempered after quenching to eliminate quenching stress and improve the toughness and plasticity of the mold; S5: Finishing: Finishing milling: Finishing milling is performed on the mold after heat treatment to further improve the dimensional accuracy and surface quality of the mold; Electrospark machining: Electrospark machining equipment is used to process the complex shapes of molds; Fine grinding: Fine grinding is performed on the mold after fine milling and EDM, so that the surface roughness of the mold meets the design requirements; S6: Surface treatment: Grind, polish and paint the surface of the mold to improve the surface quality and wear resistance of the mold; S7: Assembly and debugging: Assemble the qualified mold parts according to the requirements of the design drawings and debug the assembled molds; S8: Inspection and testing: Test the strength, hardness, wear resistance and demoulding performance of the welding mold to see if the test results meet the design requirements; The electrospark machining equipment in S5 comprises a machine tool body (1), a feed adjustment part (2) is fixedly connected to a side of the machine tool body (1), a clamping part (3) is arranged on one side of the feed adjustment part (2), the clamping part (3) comprises a fixed block (31) fixedly connected to the bottom end of the feed adjustment part (2), a stepping motor (311) for intermittent rotation is arranged on the outer side of the fixed block (31), a positioning group (33) is arranged on the inner side of the fixed block (31), an electrode member (32) for electrospark machining is arranged on the inner side of the positioning group (33), the electrode member (32) comprises an electrode block (322) rotatably connected to the inner wall of the fixed block (31), the outer end of the electrode block (322) is drivingly connected to the output end of the stepping motor (311), and a fixed shaft (321) is evenly fixed on the outer side of the electrode block (322); Wherein, the positioning group (33) comprises a cleaning member (333) for cleaning the surface of the fixed shaft (321) and positioning the side of the fixed shaft (321); The positioning group (33) further comprises a symmetrically arranged positioning frame (331), the positioning frame (331) being fixedly connected to the top end of the inner wall of the fixed block (31), a cleaning side plate (332) being flexibly connected to the opposite side of the positioning frame (331), a movable groove (336) being provided at the top end of the positioning frame (331), a cleaning member (333) being arranged inside the movable groove (336), and the cleaning members (333) being arranged opposite to each other.

2. The processing technology of the integrated welding mold for multi-cavity structural parts according to claim 1 is characterized in that: A stepper motor (311) is arranged outside the middle of the fixed block (31); the output end of the stepper motor (311) is fixedly connected to the outer end of the electrode member (32); a limit member (34) is arranged between the inner wall of the fixed block (31) and the positioning frame (331); the electrode member (32) comprises an electrode block (322) fixedly connected to the output end of the stepper motor (311); both ends of the electrode block (322) pass through the middle of the positioning frame (331); and the electrode block (322) is fixedly connected to the outer side of the fixed shaft (321).

3. The processing technology of the integrated welding mold for multi-cavity structural parts according to claim 2 is characterized in that: The limit member (34) comprises a rotary plate (341) fixedly connected to both ends of the electrode block (322); the other end of the rotary plate (341) is rotatably connected to the inner wall of the fixed block (31); the outer side of the rotary plate (341) is engaged with the limit block (342); the other end of the limit block (342) is movably connected to a rotating shaft (343); and the rotating shaft (343) is fixedly connected to the inner wall of the fixed block (31).

4. The processing technology of the integrated welding mold for multi-cavity structural parts according to claim 1 is characterized in that: A limiting groove (337) is provided on the inner side of the movable groove (336); a telescopic spring (338) is elastically connected to the inner wall of the limiting groove (337); a positioning member (335) is provided at the other end of the telescopic spring (338); the positioning member (335) comprises a second magnetic block (3353) slidably connected to the inner wall of the limiting groove (337); a connecting plate (3352) is fixedly connected to the middle part of the outer side of the second magnetic block (3353); and a ring block (3351) is fixedly connected to the other end of the connecting plate (3352).

5. The processing technology of the integrated welding mold for multi-cavity structural parts according to claim 4 is characterized in that: A second ring block (339) is fixedly connected to the other end of the inner wall of the movable groove (336); the second ring block (339) and the first ring block (3351) are engaged with each other on the sides facing each other; the inner wall of the second ring block (339) is rotatably connected to the outer end of one of the cleaning members (333); and the two ends of the other cleaning member (333) are rotatably connected to the inner wall of the movable groove (336) on one side close to the limiting groove (337).

6. The processing technology of the integrated welding mold for multi-cavity structural parts according to claim 5 is characterized in that: The cleaning member (333) comprises a main shaft (3333) rotatably connected to the inner wall of the movable groove (336); the middle of the main shaft (3333) passes through a counterweight block (3332); and a cleaning brush plate (3331) is fixedly connected inside the counterweight block (3332).

7. The processing technology of the integrated welding mold for multi-cavity structural parts according to claim 6 is characterized in that: Magnetic block 1 (3334) is fixedly connected to both ends of the main shaft (3333) on one side close to the limiting groove (337), and the magnetic block 1 (3334) is magnetically connected to the outer side of magnetic block 2 (3353).

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