Milling equipment for curved surface machining of workpiece

Abstract

The present invention provides a milling device for curved surface processing of a workpiece, comprising a hood assembly and an A-axis synchronous drive mechanism, wherein the hood assembly comprises an outer hood, a plurality of door bodies and an upper bracket; wherein the plurality of door bodies are slidably connected to the bottom of the outer hood, the upper bracket is installed on the top of the outer hood, and the A-axis synchronous drive mechanism is installed on the middle part of the inner wall of the outer hood; the present invention uses a B-axis drive mechanism to clamp and fix a plurality of special workpieces that need to be processed on curved surfaces at the same time, and then drives the second bevel gear to drive the first bevel gear to rotate synchronously through a reduction motor, so that the rotating first bevel gear cooperates with the A-axis drive frame to drive the workpiece to rotate simultaneously along the A-axis direction, and then drives a plurality of milling cutter bodies to rotate synchronously through the milling synchronous drive mechanism, so that a plurality of rotating milling cutter bodies can be used to perform curved surface processing on a plurality of workpiece surfaces respectively, thereby improving the curved surface processing efficiency and saving the processing cost.

Description

Technical Field

[0001] The invention relates to a milling device for a special workpiece, in particular to a milling device for processing a curved surface of a workpiece, and belongs to the technical field of milling devices. Background Art

[0002] Milling machine is a common metal processing machine tool, which is mainly used to remove material from the workpiece through a rotating milling cutter to achieve processing of various shapes and sizes. Surface processing is an important field in mechanical manufacturing. It refers to processing complex curved shapes on the workpiece to meet the requirements of some special workpieces for curved shapes.

[0003] The Chinese patent, entitled "A milling device for the production and processing of metal products" (patent number ZL202410480668.4), discloses a metal product production and processing technology. By setting a round block, a rubber elastic tube and a spray block, and because the milling tool body and the spray head are designed to be separated, when the two need maintenance and repair, there will be no interference between the two. When the pneumatic cylinder is running, the lifting plate will move downward as a whole, and finally the bottom end of the round block will be stuck in the top of the spray block. At this time, when the milling tool body moves left and right, the rubber elastic tube has good elasticity, which can meet the space requirements of the left and right movement of the milling tool body. However, although the equipment can ensure that multiple spray heads can move together with the milling tool body, it cannot meet the curved surface processing requirements of some special workpieces, such as the outer curved surface processing operation of the square structure. And it is the same as the traditional CNC machining center, which can only process a single part at a time, and the processing efficiency is low.

[0004] The Chinese patent entitled "A Blade Milling Machine Tool" (publication number CN115464192A) discloses a milling machine tool technology. By configuring the clamping device to be able to swing on a vertical plane instead of the tool shaft device swinging on a vertical plane, the tool shaft device is mainly responsible for milling the blade, while the adjustment of the spatial posture (swing angle) of the blade relative to the milling cutter is the responsibility of the clamping device, thereby effectively avoiding the frequent and large displacement movement of the tool shaft device and the poor dynamic characteristics during the processing. However, although the machine tool can realize complex curved surface processing operations, it still has the problem of only being able to process a single part and having low processing efficiency. For this reason, a milling device for curved surface processing of a workpiece is proposed. Summary of the invention

[0005] In view of this, the present invention provides a milling device for curved surface machining of a workpiece to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the embodiment of the present invention is implemented as follows: a milling device for curved surface machining of a workpiece, comprising a hood assembly and an A-axis synchronous drive mechanism, wherein the hood assembly comprises an outer hood, a plurality of door bodies and an upper bracket;

[0007] Among them, several of the door bodies are slidably connected to the bottom of the outer hood, the upper bracket is installed on the top of the outer hood, the A-axis synchronous drive mechanism is installed in the middle of the inner wall of the outer hood, four X-axis drive mechanisms are symmetrically installed at the bottom of the inner wall of the outer hood, a Z-axis drive mechanism is provided above the four X-axis drive mechanisms, a B-axis drive mechanism is installed in the middle of the Z-axis drive mechanism, a Y-axis synchronous drive mechanism is installed between the upper bracket and the outer hood, and a milling synchronous drive mechanism is installed inside the Y-axis synchronous drive mechanism;

[0008] The A-axis synchronous drive mechanism is used to synchronously drive the Z-axis drive mechanism and the B-axis drive mechanism to rotate along the A-axis direction, and the A-axis synchronous drive mechanism includes eight A-axis drive racks, four first bevel gears, a reduction motor, and a second bevel gear;

[0009] One end of the eight A-axis drive frames are rotatably connected to the inside of the four X-axis drive mechanisms in pairs, the four first bevel gears are respectively arranged at one end of the four A-axis drive frames, the outer side wall of the second bevel gear is meshed and connected with the outer side walls of the four first bevel gears, and one end of the second bevel gear is fixedly connected to the output shaft of the reduction motor;

[0010] Wherein, the Z-axis driving mechanism is used to drive the B-axis driving mechanism to move along the Z-axis direction;

[0011] Wherein, the B-axis driving mechanism is used to clamp and fix the workpiece, and drive the workpiece to rotate along the B-axis direction;

[0012] Wherein, the Y-axis synchronous drive mechanism is used to drive the milling synchronous drive mechanism to move along the Y-axis direction;

[0013] Wherein, the milling synchronous drive mechanism is used to drive the milling tool to rotate synchronously; the milling synchronous drive mechanism includes a connecting shaft and a milling cutter body, and one end of the milling cutter body is installed at the bottom of the inner side wall of the connecting shaft.

[0014] Further preferably, the A-axis synchronous drive mechanism further includes four cross connecting rods, four inner cross sleeves and a central bracket;

[0015] Among them, the central bracket is fixedly connected to the middle part of the inner wall of the outer hood, the reduction motor is installed at the bottom of the inner wall of the central bracket, the four cross connecting rods are respectively fixedly connected to one end of the four A-axis drive frames, the four inner cross sleeves are all rotatably connected to the top of the inner wall of the central bracket, the outer side walls of the four cross connecting rods are respectively slidably connected to the inner side walls of the four inner cross sleeves, and one end of the four first bevel gears is respectively fixedly connected to one end of the four inner cross sleeves.

[0016] Further preferably, the four X-axis drive mechanisms each include a rodless cylinder and an X-axis drive frame;

[0017] Among them, the rodless cylinder is installed at the bottom of the inner wall of the outer hood, the X-axis drive frame is fixedly connected to the output block of the rodless cylinder, and one end of the eight A-axis drive frames are rotatably connected to the inner wall of the X-axis drive frame in pairs.

[0018] Further preferably, the four Z-axis driving mechanisms each include two first cylinders, a Z-axis driving frame, two positioning slots and four first guide rods;

[0019] Among them, the two first cylinders are respectively installed at the bottom of the two A-axis drive frames, the two positioning grooves are respectively opened on the upper surfaces of the two A-axis drive frames, the two sides of the Z-axis drive frame are respectively slidably connected to the inner walls of the two positioning grooves, the piston rods of the two first cylinders both penetrate the inner wall of the A-axis drive frame and are fixedly connected to the bottom of the Z-axis drive frame, one ends of the four first guide rods are fixedly connected to the bottom of the Z-axis drive frame, and the outer sides of the four first guide rods are respectively slidably connected to the inner walls of the two A-axis drive frames.

[0020] Further preferably, the B-axis driving mechanism is composed of a synchronous motor, a B-axis driving frame and a pneumatic chuck;

[0021] Among them, the synchronous motor is installed at the bottom of the Z-axis driving frame, the outer wall of the B-axis driving frame is rotatably connected to the inner wall of the Z-axis driving frame, the output shaft of the synchronous motor is fixedly connected to the bottom of the B-axis driving frame, and the pneumatic chuck is installed and fixedly connected to the upper surface of the B-axis driving frame.

[0022] Further preferably, the Y-axis synchronous drive mechanism includes four second cylinders, a Y-axis lifting frame, a cover plate and four extension columns;

[0023] Among them, the four second-level cylinders are all installed on the upper surface of the upper bracket, the Y-axis lifting frame is arranged on the top of the inner wall of the outer hood, the cover plate is installed on the top of the inner wall of the Y-axis lifting frame, one end of the piston rod of the four second-level cylinders passes through the inner wall of the upper bracket and is fixedly connected to the upper surface of the cover plate, and the four extension columns are fixedly connected to the bottom of the cover plate.

[0024] Further preferably, the milling synchronous drive mechanism further comprises a milling drive motor, a driving gear, a first drive chain, two first driven gears, a partition, a second drive chain and two second driven gears;

[0025] Among them, there are four connecting shafts and milling cutter bodies, the milling drive motor is installed at the bottom of the Y-axis lifting frame, the driving gear is fixedly connected to the output shaft of the milling drive motor, the two first driven gears are respectively fixedly connected to the ends of the two connecting shafts away from the milling cutter body, the partition is fixedly connected to the middle of the inner side wall of the Y-axis lifting frame, one ends of the two first driven gears both pass through the partition, the inner side wall of the first drive chain is meshed and connected to the two first driven gears and the top of the outer side wall of the driving gear, the two second driven gears are respectively fixedly connected to the ends of the other two connecting shafts away from the milling cutter body, and the inner side walls of the second drive chain are respectively meshed and connected to the outer side walls of the two second driven gears and the bottom of the outer side wall of the driving gear.

[0026] Further preferably, a flexible connecting sleeve is fixedly connected to the top of the central bracket, the top of the flexible connecting sleeve is fixedly connected to the middle of the lower surface of the Y-axis lifting frame, and the outer side walls of the four extension columns are installed with infusion tubes.

[0027] Further preferably, the outer side wall of the Y-axis lifting frame is fixedly connected with a plurality of fixing ears, the upper surfaces of the plurality of fixing ears are fixedly connected with a second guide rod, and the outer side wall of the second guide rod is slidably connected with the inner side wall of the upper bracket.

[0028] Further preferably, a control terminal is installed on one side of the outer cover, and an indicator light is installed on the upper surface of the upper bracket.

[0029] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0030] 1. The present invention uses a B-axis driving mechanism to clamp and fix multiple special workpieces that need to be processed on curved surfaces at the same time, and then drives the second bevel gear to drive the first bevel gear to rotate synchronously through a reduction motor, so that the rotating first bevel gear cooperates with the A-axis driving frame to drive the workpiece to rotate simultaneously along the A-axis direction, and then drives multiple milling cutter bodies to rotate synchronously through a milling synchronous driving mechanism, so that multiple rotating milling cutter bodies can be used to perform curved surface processing on multiple workpiece surfaces respectively, thereby improving the curved surface processing efficiency and saving processing costs.

[0031] 2. During the curved surface machining process, the present invention drives the workpiece to rotate along the A-axis direction, move along the Z-axis direction, rotate along the B-axis direction and move along the X-axis direction through the A-axis synchronous drive mechanism, the Z-axis drive mechanism, the B-axis drive mechanism and the X-axis drive mechanism, so as to control the longitudinal angle, longitudinal position, transverse angle and transverse position of the milling, and then drives the milling synchronous drive mechanism to move up and down along the Y-axis direction through the Y-axis synchronous drive mechanism to control the milling depth, so as to machine complex curved surface shapes on the surface of special workpieces, meeting the curved surface machining requirements of the workpiece surface, and the driving structure is mostly located on the workpiece side, and adopts a separate design with the milling synchronous drive mechanism, retaining only the upper and lower driving structures, so that the milling tool is more stable during the milling process.

[0032] The above summary is for illustrative purposes only and is not limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a structural diagram of the present invention;

[0035] Figure 2 It is a cross-sectional structural schematic diagram of the first embodiment of the present invention;

[0036] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of region A;

[0037] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of region B;

[0038] Figure 5 It is a schematic cross-sectional structural diagram of the outer hood in the first embodiment of the present invention;

[0039] Figure 6 This is an isometric view of the Y-axis lifting frame in the first embodiment of the present invention;

[0040] Figure 7 This is an isometric view of the X-axis driving frame in the first embodiment of the present invention;

[0041] Figure 8 It is an isometric view of the first drive chain in the first embodiment of the present invention;

[0042] Fig. 9 It is an isometric view of the second drive chain in the first embodiment of the present invention;

[0043] Fig.10 This is a schematic diagram of the working state of the first embodiment of the present invention;

[0044] Fig.11 For the present invention Figure 2 A schematic diagram of the enlarged structure of the C region;

[0045] Fig.12 This is a schematic diagram of the working state of the second embodiment of the present invention;

[0046] Fig.13 This is an isometric view of the X-axis driving frame in the first embodiment of the present invention.

[0047] Figure numerals: 1, hood assembly; 2, A-axis synchronous drive mechanism; 3, Z-axis drive mechanism; 4, B-axis drive mechanism; 5, Y-axis synchronous drive mechanism; 6, milling synchronous drive mechanism; 7, X-axis drive mechanism; 101, outer hood; 102, door body; 103, upper bracket; 201, A-axis drive frame; 202, cross connecting rod; 203, inner cross sleeve; 204, first bevel gear; 205, center bracket; 206, reduction motor; 207, second bevel gear; 301, first cylinder; 302, Z-axis drive frame; 303, positioning groove; 304, first guide rod; 401, synchronous Motor; 402, B-axis drive frame; 403, pneumatic chuck; 501, second cylinder; 502, Y-axis lifting frame; 503, cover plate; 504, extension column; 601, milling drive motor; 602, driving gear; 603, first drive chain; 604, first driven gear; 605, partition; 606, second drive chain; 607, second driven gear; 608, connecting shaft; 609, milling cutter body; 701, rodless cylinder; 702, X-axis drive frame; 81, flexible connecting sleeve; 82, fixing ear; 83, second guide rod; 84, control terminal; 85, indicator light; 86, infusion tube. DETAILED DESCRIPTION

[0048] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0049] It should be noted that the terms "first", "second", "symmetrical", "array", etc. are only used to distinguish between description and position description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "symmetrical", etc. can explicitly or implicitly include one or more of these features; similarly, when the number of certain features is not limited in the form of words such as "two" or "three", it should be noted that this feature also explicitly or implicitly includes one or more feature quantities.

[0050] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0051] Embodiment 1

[0052] like Figure 1-Figure 11 As shown, an embodiment of the present invention provides a milling device for curved surface machining of a workpiece, comprising a hood assembly 1 and an A-axis synchronous drive mechanism 2, wherein the hood assembly 1 comprises an outer hood 101, a plurality of door bodies 102 and an upper bracket 103;

[0053] Among them, a number of door bodies 102 are slidably connected to the bottom of the outer hood 101, the upper bracket 103 is installed on the top of the outer hood 101, the A-axis synchronous drive mechanism 2 is installed in the middle of the inner wall of the outer hood 101, four X-axis drive mechanisms 7 are symmetrically installed at the bottom of the inner wall of the outer hood 101, and a Z-axis drive mechanism 3 is provided above the four X-axis drive mechanisms 7. A B-axis drive mechanism 4 is installed in the middle of the Z-axis drive mechanism 3, a Y-axis synchronous drive mechanism 5 is installed between the upper bracket 103 and the outer hood 101, and a milling synchronous drive mechanism 6 is installed inside the Y-axis synchronous drive mechanism 5;

[0054] The A-axis synchronous drive mechanism 2 is used to synchronously drive the Z-axis drive mechanism 3 and the B-axis drive mechanism 4 to rotate along the A-axis direction. The A-axis synchronous drive mechanism 2 includes eight A-axis drive frames 201, four first bevel gears 204, a reduction motor 206, and a second bevel gear 207;

[0055] Among them, one end of the eight A-axis driving frames 201 are rotatably connected to the inside of the four X-axis driving mechanisms 7 in pairs, four first bevel gears 204 are respectively arranged at one end of the four A-axis driving frames 201, the outer side wall of the second bevel gear 207 is meshed and connected with the outer side walls of the four first bevel gears 204, and one end of the second bevel gear 207 is fixedly connected to the output shaft of the reduction motor 206;

[0056] Wherein, the Z-axis driving mechanism 3 is used to drive the B-axis driving mechanism 4 to move along the Z-axis direction;

[0057] The B-axis driving mechanism 4 is used to clamp and fix the workpiece, and drive the workpiece to rotate along the B-axis direction;

[0058] Wherein, the Y-axis synchronous driving mechanism 5 is used to drive the milling synchronous driving mechanism 6 to move along the Y-axis direction;

[0059] The milling synchronous drive mechanism 6 is used to drive the milling tool to rotate synchronously; the milling synchronous drive mechanism 6 includes a connecting shaft 608 and a milling cutter body 609 , and one end of the milling cutter body 609 is installed at the bottom of the inner side wall of the connecting shaft 608 .

[0060] In one embodiment, the A-axis synchronous drive mechanism 2 further includes four cross links 202, four inner cross sleeves 203 and a center bracket 205;

[0061] Among them, the center bracket 205 is fixedly connected to the middle part of the inner wall of the outer hood 101, the reduction motor 206 is installed at the bottom of the inner wall of the center bracket 205, the four cross links 202 are respectively fixedly connected to one end of the four A-axis drive frames 201, the four inner cross sleeves 203 are all rotatably connected to the top of the inner wall of the center bracket 205, the outer walls of the four cross links 202 are respectively slidably connected to the inner walls of the four inner cross sleeves 203, and one end of the four first bevel gears 204 is respectively fixedly connected to one end of the four inner cross sleeves 203.

[0062] The output shaft of the reduction motor 206 uses the second bevel gear 207 to drive the first bevel gear 204 to rotate, and the rotating first bevel gear 204 uses the inner cross sleeve 203 and the cross connecting rod 202 to drive the A-axis drive frame 201 to rotate. The rotating A-axis drive frame 201 drives the Z-axis drive mechanism 3, the B-axis drive mechanism 4 and the blank to rotate slightly along the A-axis direction, so as to cooperate with the high-speed rotating milling cutter body 609 to perform longitudinal curved surface processing on the surface of the blank.

[0063] In one embodiment, the four X-axis driving mechanisms 7 each include a rodless cylinder 701 and an X-axis driving frame 702;

[0064] Among them, the rodless cylinder 701 is installed at the bottom of the inner wall of the outer cover 101, the X-axis drive frame 702 is fixedly connected to the output block of the rodless cylinder 701, and one end of the eight A-axis drive frames 201 are rotatably connected to the inner wall of the X-axis drive frame 702 in pairs.

[0065] The output block of the rodless cylinder 701 drives the X-axis drive frame 702 to move, and the moving X-axis drive frame 702 drives the A-axis drive frame 201, the Z-axis drive mechanism 3, the B-axis drive mechanism 4 and the blank to move along the X-axis direction, so as to cooperate with the high-speed rotating milling cutter body 609 to perform transverse milling processing on the surface of the blank.

[0066] In one embodiment, the four Z-axis driving mechanisms 3 each include two first cylinders 301 , a Z-axis driving frame 302 , two positioning slots 303 and four first guide rods 304 ;

[0067] Among them, the two first cylinders 301 are respectively installed at the bottom of the two A-axis driving frames 201, the two positioning grooves 303 are respectively opened on the upper surfaces of the two A-axis driving frames 201, and the two sides of the Z-axis driving frame 302 are respectively slidably connected to the inner walls of the two positioning grooves 303, the piston rods of the two first cylinders 301 all penetrate the inner walls of the A-axis driving frames 201 and are fixedly connected to the bottom of the Z-axis driving frames 302, one ends of the four first guide rods 304 are fixedly connected to the bottom of the Z-axis driving frames 302, and the outer walls of the four first guide rods 304 are respectively slidably connected to the inner walls of the two A-axis driving frames 201.

[0068] The Z-axis driving frame 302 is driven to move by the piston rod of the first cylinder 301, and the moving Z-axis driving frame 302 drives the B-axis driving mechanism 4 and the blank to move along the Z-axis direction, so as to cooperate with the high-speed rotating milling cutter body 609 to perform longitudinal milling processing on the surface of the blank.

[0069] In one embodiment, the B-axis driving mechanism 4 is composed of a synchronous motor 401, a B-axis driving frame 402 and a pneumatic chuck 403;

[0070] Among them, the synchronous motor 401 is installed at the bottom of the Z-axis driving frame 302, the outer wall of the B-axis driving frame 402 is rotatably connected to the inner wall of the Z-axis driving frame 302, the output shaft of the synchronous motor 401 is fixedly connected to the bottom of the B-axis driving frame 402, and the pneumatic chuck 403 is installed and fixedly connected to the upper surface of the B-axis driving frame 402.

[0071] The output shaft of the synchronous motor 401 drives the B-axis driving frame 402 to rotate. The rotating B-axis driving frame 402 drives the blank to rotate along the B-axis direction using the pneumatic chuck 403, so as to cooperate with the high-speed rotating milling cutter body 609 to perform transverse curved surface processing on the surface of the blank.

[0072] In one embodiment, the Y-axis synchronous driving mechanism 5 includes four second cylinders 501, a Y-axis lifting frame 502, a cover plate 503 and four extension columns 504;

[0073] Among them, the four second cylinders 501 are all installed on the upper surface of the upper bracket 103, the Y-axis lifting frame 502 is arranged on the top of the inner wall of the outer hood 101, and the cover plate 503 is installed on the top of the inner wall of the Y-axis lifting frame 502. One end of the piston rod of the four second cylinders 501 passes through the inner wall of the upper bracket 103 and is fixedly connected to the upper surface of the cover plate 503, and the four extension columns 504 are fixedly connected to the bottom of the cover plate 503.

[0074] The piston rod of the second cylinder 501 pushes the cover plate 503 to drive the Y-axis lifting frame 502 to move, and the moving Y-axis lifting frame 502 drives the milling synchronous driving mechanism 6 to move as a whole.

[0075] In one embodiment, the milling synchronous drive mechanism 6 further includes a milling drive motor 601, a driving gear 602, a first drive chain 603, two first driven gears 604, a partition plate 605, a second drive chain 606 and two second driven gears 607;

[0076] Among them, there are four connecting shafts 608 and milling cutter bodies 609, the milling drive motor 601 is installed at the bottom of the Y-axis lifting frame 502, the driving gear 602 is fixedly connected to the output shaft of the milling drive motor 601, the two first driven gears 604 are respectively fixedly connected to the ends of the two connecting shafts 608 away from the milling cutter body 609, the partition 605 is fixedly connected to the middle of the inner wall of the Y-axis lifting frame 502, one ends of the two first driven gears 604 both penetrate the partition 605, the inner wall of the first drive chain 603 is meshed and connected to the two first driven gears 604 and the top of the outer wall of the driving gear 602, the two second driven gears 607 are respectively fixedly connected to the ends of the other two connecting shafts 608 away from the milling cutter body 609, and the inner wall of the second drive chain 606 is respectively meshed and connected to the outer walls of the two second driven gears 607 and the bottom of the outer wall of the driving gear 602.

[0077] The output shaft of the milling drive motor 601 drives the driving gear 602 to rotate, and the rotating driving gear 602 uses the first drive chain 603 and the second drive chain 606 to respectively drive the two first driven gears 604 and the second driven gear 607 to rotate synchronously, and the two rotating first driven gears 604 and the second driven gear 607 drive the connecting shaft 608 to rotate, and the rotating connecting shaft 608 drives the milling cutter body 609 to rotate.

[0078] In one embodiment, a flexible connecting sleeve 81 is fixedly connected to the top of the central bracket 205, and the top of the flexible connecting sleeve 81 is fixedly connected to the middle of the lower surface of the Y-axis lifting frame 502. The outer walls of the four extension columns 504 are installed with infusion tubes 86. The outer wall of the Y-axis lifting frame 502 is fixedly connected to a plurality of fixing ears 82, and the upper surfaces of the plurality of fixing ears 82 are fixedly connected to a second guide rod 83. The outer wall of the second guide rod 83 is slidably connected to the inner wall of the upper bracket 103.

[0079] The flexible connecting sleeve 81 is used to connect the central support 205 and the Y-axis lifting frame 502 and to protect the milling drive motor 601. The second guide rod 83 is slid in the upper support 103 to guide the moving Y-axis lifting frame 502.

[0080] In one embodiment, a control terminal 84 is installed on one side of the outer housing 101 , and an indicator light 85 is installed on the upper surface of the upper bracket 103 .

[0081] The control terminal 84 is provided to record the processing program according to the processing requirements, and the indicator light 85 is provided to indicate the working status of the equipment.

[0082] When the present invention is working: first, the outer hood 101 is opened by moving the door body 102, and then the blanks of the special workpiece are placed on the pneumatic chuck 403 in turn and clamped and fixed, and then the milling cutter body 609 of corresponding specifications is installed and fixed in the connecting shaft 608 according to the processing requirements, and then the control program is entered into the control terminal 84, and finally the door body 102 is moved to close the outer hood 101 to complete the preparation work before processing.

[0083] When curved surface machining is required, taking the outer curved surface machining operation of a square structure as an example, the A-axis synchronous drive mechanism 2, the Z-axis drive mechanism 3, the milling synchronous drive mechanism 6, the Y-axis synchronous drive mechanism 5, the X-axis drive mechanism 7 and the B-axis drive mechanism 4 are started in sequence according to the program through the control terminal 84, and the output shaft of the reduction motor 206 drives the second bevel gear 207 to rotate, and the rotating second bevel gear 207 drives the first bevel gear 204 to rotate, and the rotating first bevel gear 204 drives the A-axis drive frame 201 to rotate by means of the inner cross sleeve 203 and the cross connecting rod 202, and the rotating A-axis drive frame 201 drives the Z-axis drive mechanism 3 to rotate 90° as a whole, and then drives the Z-axis drive frame 302 to move through the piston rod of the first cylinder 301, and the moving Z-axis drive frame 302 drives the B-axis drive mechanism 4 and the blank to move to the initial machining position to complete the initial action.

[0084] When the initial action is completed, the output shaft of the milling drive motor 601 drives the driving gear 602 to rotate, and the rotating driving gear 602 drives the two first driven gears 604 and the second driven gear 607 to rotate synchronously by using the first driving chain 603 and the second driving chain 606 respectively, and the two rotating first driven gears 604 and the second driven gear 607 drive the connecting shaft 608 to rotate, and the rotating connecting shaft 608 drives the milling cutter body 609 to rotate at a high speed, and then the piston rod of the second cylinder 501 pushes the cover plate 503 to drive the Y The Y-axis lifting frame 502 moves, and the moving Y-axis lifting frame 502 drives the milling synchronous drive mechanism 6 as a whole and the second guide rod 83 to move along the Y-axis direction. The moving second guide rod 83 guides the moving Y-axis lifting frame 502 by sliding in the upper bracket 103. The moving milling synchronous drive mechanism 6 mills the surface of the blank through the high-speed rotating milling cutter body 609. The milling depth can be controlled by controlling the height of the milling cutter body 609. The Y-axis direction is the telescopic movement direction of the piston rod of the second cylinder 501.

[0085] When the initial milling depth reaches the requirement and transverse milling processing is required, the output block of the rodless cylinder 701 drives the X-axis drive frame 702 to move, and the moving X-axis drive frame 702 drives the A-axis drive frame 201, the Z-axis drive mechanism 3, the B-axis drive mechanism 4 and the blank to move along the X-axis direction, so as to cooperate with the high-speed rotating milling cutter body 609 to perform transverse milling processing on the surface of the blank, and the moving A-axis drive frame 201 drives the cross connecting rod 202 to slide in the inner cross sleeve 203, so as to use the cross connecting rod 202 and the inner cross sleeve 203 to compensate for the distance between the A-axis drive frame 201 and the center bracket 205. The X-axis direction is the movement direction of the output block of the rodless cylinder 701.

[0086] When transverse curved surface processing is required, the B-axis driving frame 402 is driven to rotate by the output shaft of the synchronous motor 401. The rotating B-axis driving frame 402 uses the pneumatic chuck 403 to drive the blank to rotate along the B-axis direction, so as to cooperate with the high-speed rotating milling cutter body 609 to perform transverse curved surface processing on the surface of the blank. The B-axis direction is the direction of rotation of the synchronous motor 401.

[0087] When longitudinal curved surface processing is required, the output shaft of the reduction motor 206 uses the second bevel gear 207 to drive the first bevel gear 204 to rotate, and the rotating first bevel gear 204 uses the inner cross sleeve 203 and the cross connecting rod 202 to drive the A-axis driving frame 201 to rotate. The rotating A-axis driving frame 201 drives the Z-axis driving mechanism 3, the B-axis driving mechanism 4 and the blank to rotate slightly along the A-axis direction, so as to cooperate with the high-speed rotating milling cutter body 609 to perform longitudinal curved surface processing on the surface of the blank. The A-axis direction is the rotation direction of the cross sleeve 203 and the cross connecting rod 202.

[0088] When longitudinal milling is required, the piston rod of the first cylinder 301 drives the Z-axis drive frame 302 to move in the opposite direction, and the moving Z-axis drive frame 302 drives the B-axis drive mechanism 4 and the blank to move along the Z-axis direction, so as to cooperate with the high-speed rotating milling cutter body 609 to perform longitudinal milling on the surface of the blank, and then repeat the operation to process the blank into a square structural part with a complex curved surface shape. The Z-axis direction is the telescopic movement direction of the piston rod of the first cylinder 301.

[0089] The indicator light 85 is provided to indicate the working status of the equipment, and the infusion tube 86 is provided to flush the milling fluid to the end of the milling cutter body 609 during the milling process to cool the milling cutter body 609 and prevent milling debris from splashing.

[0090] Embodiment 2

[0091] like Figure 1-Figure 13 As shown, an embodiment of the present invention provides a milling device for curved surface machining of a workpiece, comprising a hood assembly 1 and an A-axis synchronous drive mechanism 2, wherein the hood assembly 1 comprises an outer hood 101, a plurality of door bodies 102 and an upper bracket 103;

[0092] Among them, a number of door bodies 102 are slidably connected to the bottom of the outer hood 101, the upper bracket 103 is installed on the top of the outer hood 101, the A-axis synchronous drive mechanism 2 is installed in the middle of the inner wall of the outer hood 101, four X-axis drive mechanisms 7 are symmetrically installed at the bottom of the inner wall of the outer hood 101, and a Z-axis drive mechanism 3 is provided above the four X-axis drive mechanisms 7. A B-axis drive mechanism 4 is installed in the middle of the Z-axis drive mechanism 3, a Y-axis synchronous drive mechanism 5 is installed between the upper bracket 103 and the outer hood 101, and a milling synchronous drive mechanism 6 is installed inside the Y-axis synchronous drive mechanism 5;

[0093] The A-axis synchronous drive mechanism 2 is used to synchronously drive the Z-axis drive mechanism 3 and the B-axis drive mechanism 4 to rotate along the A-axis direction. The A-axis synchronous drive mechanism 2 includes eight A-axis drive frames 201, four first bevel gears 204, a reduction motor 206, and a second bevel gear 207;

[0094] Among them, one end of the eight A-axis driving frames 201 are rotatably connected to the inside of the four X-axis driving mechanisms 7 in pairs, four first bevel gears 204 are respectively arranged at one end of the four A-axis driving frames 201, the outer side wall of the second bevel gear 207 is meshed and connected with the outer side walls of the four first bevel gears 204, and one end of the second bevel gear 207 is fixedly connected to the output shaft of the reduction motor 206;

[0095] Wherein, the Z-axis driving mechanism 3 is used to drive the B-axis driving mechanism 4 to move along the Z-axis direction;

[0096] The B-axis driving mechanism 4 is used to clamp and fix the workpiece, and drive the workpiece to rotate along the B-axis direction;

[0097] Wherein, the Y-axis synchronous driving mechanism 5 is used to drive the milling synchronous driving mechanism 6 to move along the Y-axis direction;

[0098] The milling synchronous drive mechanism 6 is used to drive the milling tool to rotate synchronously; the milling synchronous drive mechanism 6 includes a connecting shaft 608 and a milling cutter body 609 , and one end of the milling cutter body 609 is installed at the bottom of the inner side wall of the connecting shaft 608 .

[0099] The difference from the first embodiment is that two groups of fixed-position B-axis driving mechanisms 4 are arranged on each Z-axis driving mechanism 3, for a total of eight groups, as shown in FIG. Fig.12 As shown, corresponding connecting shafts 608 and milling cutter bodies 609 are provided above each group of B-axis driving mechanisms 4, and there are eight connecting shafts 608 and milling cutter bodies 609 respectively. Four first driven gears 604 and second driven gears 607 are fixed to one end of the eight connecting shafts 608 away from the milling cutter body 609, respectively, which are not shown in the specific figures. The principle is the same as that of Example 1, and the rest of the structure is also the same as that of Example 1.

[0100] When performing milling processing, the milling drive motor 601 is used to drive the driving gear 602 to rotate, and the rotating driving gear 602 uses the first drive chain 603 and the second drive chain 606 to drive the four first driven gears 604 and the second driven gear 607 to rotate, and the rotating four first driven gears 604 and the second driven gear 607 drive the eight milling cutter bodies 609 to rotate synchronously through the connecting shaft 608, and then cooperate with the A-axis synchronous drive mechanism 2, the Z-axis drive mechanism 3, the Y-axis synchronous drive mechanism 5, the X-axis drive mechanism 7 and the eight groups of B-axis drive mechanisms 4 to synchronously perform milling processing operations on eight blanks. Compared with the first embodiment, the processing efficiency is further improved.

[0101] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A milling device for curved surface machining of a workpiece, comprising a hood assembly (1) and an A-axis synchronous drive mechanism (2), characterized in that: The hood assembly (1) comprises an outer hood (101), a plurality of door bodies (102) and an upper bracket (103); Wherein, a plurality of the door bodies (102) are slidably connected to the bottom of the outer hood (101), the upper bracket (103) is installed on the top of the outer hood (101), the A-axis synchronous drive mechanism (2) is installed in the middle of the inner wall of the outer hood (101), four X-axis drive mechanisms (7) are symmetrically installed at the bottom of the inner wall of the outer hood (101), a Z-axis drive mechanism (3) is arranged above the four X-axis drive mechanisms (7), a B-axis drive mechanism (4) is installed in the middle of the Z-axis drive mechanism (3), a Y-axis synchronous drive mechanism (5) is installed between the upper bracket (103) and the outer hood (101), and a milling synchronous drive mechanism (6) is installed inside the Y-axis synchronous drive mechanism (5); The A-axis synchronous drive mechanism (2) is used to synchronously drive the Z-axis drive mechanism (3) and the B-axis drive mechanism (4) to rotate along the A-axis direction, and the A-axis synchronous drive mechanism (2) comprises eight A-axis drive frames (201), four cross connecting rods (202), four inner cross sleeves (203), four first bevel gears (204), a central support (205), a reduction motor (206), and a second bevel gear (207); One end of the eight A-axis drive frames (201) are rotatably connected to the inside of the four X-axis drive mechanisms (7) in pairs, the four first bevel gears (204) are respectively arranged at one end of the four A-axis drive frames (201), the outer wall of the second bevel gear (207) is meshedly connected to the outer walls of the four first bevel gears (204), one end of the second bevel gear (207) is fixedly connected to the output shaft of the reduction motor (206), the central bracket (205) is fixedly connected to the middle part of the inner wall of the outer cover (101), The reduction motor (206) is installed at the bottom of the inner wall of the central bracket (205); the four cross connecting rods (202) are respectively fixedly connected to one end of the four A-axis driving frames (201); the four inner cross sleeves (203) are all rotatably connected to the top of the inner wall of the central bracket (205); the outer walls of the four cross connecting rods (202) are respectively slidably connected to the inner walls of the four inner cross sleeves (203); and one end of the four first bevel gears (204) is respectively fixedly connected to one end of the four inner cross sleeves (203); The milling synchronous drive mechanism (6) comprises a connecting shaft (608) and a milling cutter body (609), and one end of the milling cutter body (609) is mounted on the bottom of the inner side wall of the connecting shaft (608).

2. The milling device for curved surface machining of a workpiece according to claim 1, characterized in that: The four X-axis driving mechanisms (7) each comprise a rodless cylinder (701) and an X-axis driving frame (702); The rodless cylinder (701) is installed at the bottom of the inner wall of the outer hood (101), the X-axis drive frame (702) is fixedly connected to the output block of the rodless cylinder (701), and one end of the eight A-axis drive frames (201) are rotatably connected to the inner wall of the X-axis drive frame (702) in pairs.

3. The milling device for curved surface machining of a workpiece according to claim 1, characterized in that: The Z-axis driving mechanism (3) is used to drive the B-axis driving mechanism (4) to move along the Z-axis direction, and the four Z-axis driving mechanisms (3) each comprise two first cylinders (301), a Z-axis driving frame (302), two positioning grooves (303) and four first guide rods (304); The two first cylinders (301) are respectively mounted on the bottom of the two A-axis drive frames (201); the two positioning grooves (303) are respectively opened on the upper surfaces of the two A-axis drive frames (201); the two sides of the Z-axis drive frame (302) are respectively slidably connected to the inner side walls of the two positioning grooves (303); the piston rods of the two first cylinders (301) penetrate the inner side walls of the A-axis drive frames (201) and are fixedly connected to the bottom of the Z-axis drive frames (302); one ends of the four first guide rods (304) are respectively fixedly connected to the bottom of the Z-axis drive frames (302); and the outer side walls of the four first guide rods (304) are respectively slidably connected to the inner side walls of the two A-axis drive frames (201).

4. The milling device for curved surface machining of a workpiece according to claim 3, characterized in that: The B-axis driving mechanism (4) is used to clamp and fix the workpiece, and drive the workpiece to rotate along the B-axis direction, and the B-axis driving mechanism (4) is composed of a synchronous motor (401), a B-axis driving frame (402) and a pneumatic chuck (403); The synchronous motor (401) is installed at the bottom of the Z-axis drive frame (302), the outer wall of the B-axis drive frame (402) is rotatably connected to the inner wall of the Z-axis drive frame (302), the output shaft of the synchronous motor (401) is fixedly connected to the bottom of the B-axis drive frame (402), and the pneumatic chuck (403) is installed and fixedly connected to the upper surface of the B-axis drive frame (402).

5. The milling device for curved surface machining of a workpiece according to claim 1, characterized in that: The Y-axis synchronous drive mechanism (5) is used to drive the milling synchronous drive mechanism (6) to move along the Y-axis direction, and the Y-axis synchronous drive mechanism (5) comprises four second cylinders (501), a Y-axis lifting frame (502), a cover plate (503) and four extension columns (504); The four second cylinders (501) are all mounted on the upper surface of the upper bracket (103); the Y-axis lifting frame (502) is arranged on the top of the inner wall of the outer hood (101); the cover plate (503) is mounted on the top of the inner wall of the Y-axis lifting frame (502); one end of the piston rod of the four second cylinders (501) passes through the inner wall of the upper bracket (103) and is fixedly connected to the upper surface of the cover plate (503); and the four extension columns (504) are all fixedly connected to the bottom of the cover plate (503).

6. The milling device for curved surface machining of a workpiece according to claim 5, characterized in that: The milling synchronous drive mechanism (6) is used to drive the milling cutter to rotate synchronously, and the milling synchronous drive mechanism (6) further comprises a milling drive motor (601), a driving gear (602), a first drive chain (603), two first driven gears (604), a partition plate (605), a second drive chain (606) and two second driven gears (607); There are four connecting shafts (608) and four milling cutter bodies (609), the milling drive motor (601) is installed at the bottom of the Y-axis lifting frame (502), the driving gear (602) is fixedly connected to the output shaft of the milling drive motor (601), the two first driven gears (604) are respectively fixedly connected to the ends of the two connecting shafts (608) away from the milling cutter body (609), the partition (605) is fixedly connected to the middle of the inner side wall of the Y-axis lifting frame (502), and the two first One end of each driven gear (604) passes through the partition (605); the inner side wall of the first drive chain (603) is meshedly connected to the two first driven gears (604) and the top of the outer side wall of the driving gear (602); the two second driven gears (607) are respectively fixedly connected to one end of the other two connecting shafts (608) away from the milling cutter body (609); and the inner side wall of the second drive chain (606) is respectively meshedly connected to the outer side walls of the two second driven gears (607) and the bottom of the outer side wall of the driving gear (602).

7. The milling device for curved surface machining of a workpiece according to claim 5, characterized in that: A flexible connection sleeve (81) is fixedly connected to the top of the central support (205), and the top of the flexible connection sleeve (81) is fixedly connected to the middle of the lower surface of the Y-axis lifting frame (502). Infusion tubes (86) are installed on the outer side walls of the four extension columns (504).

8. The milling device for curved surface machining of a workpiece according to claim 5, characterized in that: The outer wall of the Y-axis lifting frame (502) is fixedly connected to a plurality of fixing ears (82), the upper surfaces of the plurality of fixing ears (82) are fixedly connected to a second guide rod (83), and the outer wall of the second guide rod (83) is slidably connected to the inner wall of the upper bracket (103).

9. The milling device for curved surface machining of a workpiece according to claim 1, characterized in that: A control terminal (84) is installed on one side of the outer cover (101), and an indicator light (85) is installed on the upper surface of the upper bracket (103).

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