Horizontal machining center, automatic tool changing method and machining center

Abstract

The invention discloses a horizontal machining center, an automatic tool changing method and a machining center. The horizontal machining center comprises a base, a numerical control rotary table, a stand column, a sliding table, a spindle box, a tool magazine and a movable tool disc. The numerical control rotary table is slidably connected with the base through the X-axis guide rail. The stand column is fixed to the base. A Y-axis guide rail is arranged in the stand column. The sliding table is movably connected to a Y-axis guide rail of the stand column. The spindle box is slidably connected with the sliding table through the Z-axis guide rail and provided with a spindle. The tool magazine is fixed to the outer side of the stand column. The movable cutter head is movably arranged on the stand column through a movable piece, and a plurality of cutter clamping claws are arranged on the movable cutter head in the circumferential direction. The tool changing action of the main shaft is moved to the upper portion, the movable tool disc and the main shaft are used for tool changing, tools of the movable tool disc and the tool magazine can be exchanged in the normal working process of the main shaft, and efficiency is improved; therefore, the problem that when the main shaft tool machining time is too short, tools cannot be exchanged in time between the tool disc and the large tool magazine, and waiting is caused is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of machining centers, and in particular to a horizontal machining center, an automatic tool change method, and a machining center. Background Art

[0002] Currently, the machining centers with double horizontal spindles mainly include:

[0003] 1. Opposed double spindles: A moving column structure, with a workbench between two columns. The workbench does not move or only moves in one direction. The two spindles can move up and down on their respective columns and move forward or backward or left and right with the columns, and simultaneously machine the two side surfaces of the same workpiece.

[0004] 2. Side-by-side double spindles: Can machine two parts simultaneously, with a moving column structure and a cross slide structure. The moving column structure is similar to the above-mentioned opposed double spindles. The workbench of the cross slide structure moves forward, backward, left, and right on the cross slide, the column does not move, and the spindle can move up and down on the column.

[0005] 3. Side-by-side double spindles with an integrated spindle box: Two side-by-side spindles are simultaneously installed on a spindle box and operate simultaneously to machine two parts. It is used in the field of machining small parts.

[0006] Defects of the Prior Art

[0007] 1. For the opposed double spindle structure, the two spindles machine the two side surfaces of a workpiece simultaneously. If the workpiece is not symmetric, when one spindle finishes machining and the other spindle still has a lot of content to machine, one spindle will stop and wait for the other, seriously affecting the machining efficiency. And if the rigidity of the workpiece itself is not good, simultaneous machining by the two spindles will cause the accuracy or surface finish of the workpiece to deteriorate.

[0008] 2. In the side-by-side double spindle structure, whether it is a moving column or a cross slide structure, there is a common drawback: Due to the large and heavy column structure and the large and heavy cross slide, it is difficult for these two types of machines to obtain higher moving speeds and accelerations, which is not conducive to manufacturing high-speed machining centers and difficult to achieve higher machining efficiency.

[0009] 3. The side-by-side double spindle structure with an integrated spindle box is only suitable for machining small parts. The distance between the two spindles and the distance between the two turntables are both fixed. Inevitably, there will be a slight error during the machine tool manufacturing process, making it impossible for the spindle distance and the turntable distance to be exactly the same. It is very difficult to make both workpieces obtain the best accuracy simultaneously during the machining process. Summary of the Invention

[0010] The technical solution of the present invention to solve the above technical problems is to provide a horizontal machining center, including: a base, at least one numerical control turntable, a column, at least one spindle box, at least one tool magazine and at least one movable tool disc; the numerical control turntable is slidably connected to the base through an X-axis guide rail; the column is fixed on the base, and a Y-axis front guide rail and a Y-axis rear guide rail are arranged inside the column; the spindle box is provided with a Z-axis upper guide rail and a Z-axis lower guide rail, the Z-axis upper guide rail is slidably connected to the Y-axis front guide rail through the vertical plane of a cross slider, and is slidably connected to the Y-axis rear guide rail through the plane of the cross slider; the Z-axis lower guide rail is slidably connected to the Y-axis front guide rail and the Y-axis rear guide rail respectively through a slide table, and a spindle is arranged on the spindle box; the tool magazine is fixed on the outside of the column; the movable tool disc is movably arranged on the column through a moving member, and a plurality of tool clamping claws are arranged on the movable tool disc along the circumferential direction;

[0011] Wherein, the moving member includes: a first guide rail, a first mounting table, a left-right driving device, a second guide rail, a second mounting table, a front-back driving device, and a rotation driving device. The first guide rail is fixed on the top surface of the column, the first mounting table is slidably connected to the first guide rail and is driven by the left-right driving device; the second mounting table is movably arranged on the first mounting table through the second guide rail and is driven by the front-back driving device; the movable tool disc is rotatably arranged on the second mounting table and is driven by the rotation driving device arranged on the second mounting table.

[0012] Further, the top view shape of the column is a T-shaped structure, with a main support part and an auxiliary support part on both sides respectively; the Y-axis front guide rail and the Y-axis rear guide rail are respectively arranged on the front and rear sides of the main support part, the bearing surface of the Y-axis front guide rail faces the direction of the numerical control turntable, and the bearing surface of the Y-axis rear guide rail faces the direction of the slide table.

[0013] Further, the movable tool disc is provided with four tool clamping claws distributed in a cross shape, and one of the tool clamping claws is configured to receive the tool returned by the spindle of the spindle box, and the remaining tool clamping claws can simultaneously clamp the tools to be replaced.

[0014] Further, the numerical control turntable is slidably connected to the X-axis guide rail and is driven by an X-axis driving lead screw; the cross slider is slidably connected to the Y-axis front guide rail and the Y-axis rear guide rail, the slide table is respectively slidably connected to the Y-axis front guide rail and the Y-axis rear guide rail and is driven by a Y-axis lead screw; the spindle box is slidably connected to the cross slider through the Z-axis upper guide rail, is slidably connected to the slide table through the Z-axis lower guide rail, and is driven by a Z-axis lead screw.

[0015] Furthermore, there are multiple tool sleeves capable of clamping tools in the tool magazine. The axis lines of the tool sleeves and the clamped tools are at a 90-degree angle to the axis line of the main spindle, and the entire tool sleeve chain of the tool magazine can rotate. When the tool to be replaced in the tool magazine needs to be exchanged onto the mobile tool disc, the tool sleeve at the tool position to be replaced can rotate 90 degrees to make the axis lines of the tool sleeve and the tool to be replaced parallel to the main spindle. The mobile tool disc can then move left and right through the left and right drive devices and move forward and backward through the front and rear drive devices to achieve tool exchange with the tools in the tool magazine.

[0016] To solve the above technical problems, the present invention also proposes an automatic tool change method for a machining center, including the steps of:

[0017] S1. The main spindle moves upward to make the tool enter the tool clamping jaws of the tool disc.

[0018] S2. The main spindle box moves backward along the Z-axis to disengage from the tool.

[0019] S3. The tool disc rotates to align the tool to be replaced with the main spindle axis.

[0020] S4. The main spindle box moves forward along the Z-axis to clamp the new tool, and the main spindle box moves downward for subsequent machining.

[0021] S5. The tool disc moves horizontally to dock with the tool magazine.

[0022] S6. The tool disc moves forward and backward to complete tool access.

[0023] S7. The tool sleeve of the tool magazine rotates to update the tool position to be replaced.

[0024] Furthermore, when performing double-spindle synchronous tool change, the two main spindles move upward simultaneously to dock with the tool disc, and the tool disc rotates to synchronously align the two groups of tools to be replaced with the double main spindle axes.

[0025] To solve the above technical problems, the present invention also proposes a machining center, including

[0026] Base;

[0027] A numerical control turntable, which is slidably connected to the base through an X-axis guide rail;

[0028] A column, which is arranged on the base, and a Y-axis guide rail is arranged inside the column;

[0029] A slide table, which is movably connected to the Y-axis guide rail of the column;

[0030] A main spindle box, which is slidably connected to the slide table through a Z-axis guide rail, and a main spindle is provided on the main spindle box;

[0031] A tool magazine, which is arranged above the front side of the column.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] 1. Efficient dual-table parallel processing:

[0034] Dual CNC turntables and independent X-axis drive: The two CNC turntables are driven by independent X-axis screws and can move left and right independently along the X-axis guide rails. Combined with the full-circle rotation of the B-axis of the worktable, dual workpiece synchronous clamping and processing can be achieved, greatly shortening the production cycle.

[0035] Dual-spindle collaborative machining: The two spindles can independently perform X, Y, and Z three-axis linkage machining, supporting complex process machining of different areas of the same workpiece or two independent workpieces at the same time.

[0036] 2. High rigidity structure and motion stability:

[0037] T-type column and cross slider connection:

[0038] The T-shaped main support end of the column is provided with the front and rear guide rails of the Y axis. The front guide rail bearing surface faces the worktable direction and directly bears the cutting reaction force. The rear guide rail is connected to the Z axis upper guide rail through a parallel cross slider to form a long force arm rigid support structure, reduce vibration deformation, and improve processing accuracy. At the same time, the T-shaped column in top view and the front and rear guide rail mounting surfaces of the main support part make the casting processing of the column more convenient and the assembly is also more convenient.

[0039] The Z-axis guide is connected to the column through a vertical cross slider (Y-axis front guide) and a parallel cross slider (Y-axis rear guide), which shortens the distance between the Z-axis guide and the column Y-axis guide, and also shortens the distance between the spindle centerline and the Y-axis guide, enhancing the rigidity and motion stability of the spindle box.

[0040] Layered guide rail layout: The Z-axis lower guide rail is slidably matched with the slide, and the Z-axis upper guide rail is connected to the column through a cross slide, so as to realize high-precision movement of the spindle box along the Z-axis, and ensure the dynamic balance of the Y-axis lifting and the Z-axis feeding. Moreover, this structure can realize the high-rigidity and high-stability connection of the spindle box without a heavy slide, which is conducive to obtaining ideal cutting processing effects and achieving higher feed speeds and higher accelerations.

[0041] 3. Rapid tool change and tool pre-storage capabilities:

[0042] Mobile cutter head with multiple tool positions:

[0043] The tool disc is equipped with four tool clamping claws distributed in a cross shape, one of which is used to receive the tool returned by the spindle, and the others can be used to pre-store tools to be replaced, realizing a "one return and three take" fast tool change mode, achieving faster tool change speed under the premise of a large-capacity tool magazine, and being able to solve the problem that when the spindle tool processing time is very short, there is no time to exchange stand-by tools between the mobile tool disc and tool magazine.

[0044] The tool disc can move in three dimensions through moving parts. It can not only connect to the spindle to change tools, but also move horizontally to the tool magazine to exchange tools. It supports parallel operations of processing and tool storage and retrieval, avoiding spindle downtime and waiting.

[0045] The tool holder of the tool magazine is arranged orthogonally to the spindle axis, and the tool holder at the tool change position can be rotated 90° to position the tool so that the tool transfer direction is parallel to the spindle axis, ensuring reliable tool change.

[0046] The tool magazine can be equipped with more than dozens of tool positions to meet the multi-tool requirements for complex parts processing and reduce the frequency of manual intervention.

[0047] Dual-spindle synchronous tool change: Through the rotation and movement of the tool disc, the two spindles can complete the tool change at the same time, further shortening the auxiliary time of multi-process processing.

[0048] Horizontal machining centers often require a large-capacity tool magazine. In general, the robot arm tool change method uses a robot arm to rotate and exchange between the main shaft and the large-capacity tool magazine. The rotation diameter of the robot arm plus the tool length requires a large range of motion, and the tool magazine protective door must be large enough. In this way, it takes a lot of time to open and close the door each time the tool is changed. In addition, if the column is not movable, this will also cause the large-capacity tool magazine to occupy the space next to the main shaft and the operator to perform debugging work, which is very inconvenient to use. The present invention solves both problems. The present invention moves the tool change action of the main shaft to the top, and uses a mobile tool disk to change tools between the main shaft, and the tools of the mobile tool disk can be exchanged between the tools of the large-capacity tool magazine during the normal operation of the main shaft. This has the following advantages: (1) The tool change action is all above the main shaft, the protective door can be made smaller and lighter, and the speed of opening and closing the door is faster, which is conducive to shortening the tool change time. (2) Since the position of the tool to be changed in the large-capacity tool magazine is moved to the top, for the column-fixed structure, the position next to the main shaft is left for the operator, making debugging more convenient.

[0049] The present invention achieves a comprehensive performance breakthrough of efficient processing, high precision and low downtime rate through the combination of dual workbenches, dual spindle collaborative processing, high-rigidity T-column, fast tool change system and modular drive design. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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 description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0051] Figure 1 It is a structural schematic diagram of the horizontal machining center of the present invention;

[0052] Figure 2 Structural schematic diagram of the column according to the present invention;

[0053] Figure 3 Top view structural schematic diagram of the column according to the present invention;

[0054] Figure 4 Structural schematic diagram of the mobile cutter head according to the present invention;

[0055] Figure 5 Structural schematic diagram of the cross slider and the slide table according to the present invention;

[0056] Figure 6 Structural schematic diagram of the machining center according to the present invention;

[0057] Figure 7 Structural schematic diagram of one embodiment of the mobile cutter head according to the present invention.

[0058] Explanation of the reference numerals in the drawings:

[0059]

[0060] Detailed implementation manners

[0061] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0062] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0063] In addition, the descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meanings of "several" and "multiple" are at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0064] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0066] The present invention provides a horizontal machining center, an automatic tool change method and a machining center, aiming to design a horizontal machining center capable of quickly changing tools.

[0067] The following will illustrate the specific structures of the horizontal machining center and the automatic tool change method proposed by the present invention in specific embodiments:

[0068] Embodiment 1:

[0069] A horizontal machining center includes:

[0070] A base 11;

[0071] A numerical control turntable 21, and the numerical control turntable 21 is slidably connected to the base 11 through an X-axis guide rail 22;

[0072] A column 31, the column 31 is fixed on the base 11, and a Y-axis front guide rail 32 and a Y-axis rear guide rail 33 are arranged inside the column 31;

[0073] A spindle box 51, the spindle box 51 is provided with a Z-axis upper guide rail 53 and a Z-axis lower guide rail 54. The Z-axis upper guide rail 53 is slidably connected to the Y-axis front guide rail 32 through the vertical plane of a cross slider 41 and is slidably connected to the Y-axis rear guide rail 33 through the plane of the cross slider 41; the Z-axis lower guide rail 54 is slidably connected to the Y-axis front guide rail 32 and the Y-axis rear guide rail 33 respectively through a slide table 42, and a spindle 52 is provided on the spindle box 51; (the cross slider 41 can be divided into a front cross slider and a rear cross slider. The two mounting surfaces of the front cross slider are perpendicular to each other, which is called a vertical cross slider and is used to connect the Y-axis front guide rail 32; the two mounting surfaces of the rear cross slider are parallel to each other, which is called a parallel cross slider and is used to connect the Y-axis rear guide rail 33).

[0074] A tool magazine 60, and the tool magazine 60 is fixed on the outside of the column 31;

[0075] The mobile tool disc 71 is movably arranged on the column 31 through a moving member 80, and a plurality of tool clamping claws 72 are arranged on the mobile tool disc 71 in the circumferential direction;

[0076] Among them, the moving member 80 includes: a first guide rail 81, a first mounting table 82, a left-right driving device 83, a second guide rail 84, a second mounting table 85, a front-back driving device 86, and a rotation driving device 87. The first guide rail 81 is fixed on the top surface of the column 31, and the first mounting table 82 is slidably connected to the first guide rail 81 and driven by the left-right driving device 83; the second mounting table 85 is movably arranged on the first mounting table 82 through the second guide rail 84 and driven by the front-back driving device 86; the mobile tool disc 71 is rotatably arranged on the second mounting table 85 and driven by the rotation driving device 87 arranged on the second mounting table 85.

[0077] Further, the top view shape of the column 31 is a T-shaped structure, which are respectively a main support part 311 and an auxiliary support part 312; Y-axis front guide rails 32 and Y-axis rear guide rails 33 are respectively arranged on the front and rear sides of the main support part 311, and the bearing surface of the Y-axis front guide rail 32 faces the direction of the NC turntable 21, and the bearing surface of the Y-axis rear guide rail 33 faces the direction of the slide table 42.

[0078] Further, the mobile tool disc 71 is provided with four tool clamping claws 72 distributed in a cross shape, and one of the tool clamping claws 72 is configured to receive the tool returned by the spindle 52 of the spindle box 51, and the remaining tool clamping claws 72 can simultaneously clamp the tool to be replaced.

[0079] Further, the NC turntable 21 is slidably connected to the X-axis guide rail 22 and driven by the X-axis driving lead screw;

[0080] The cross slide block 41 is slidably connected to the Y-axis front guide rail 32 and the Y-axis rear guide rail 33, and the slide table 42 is respectively slidably connected to the Y-axis front guide rail 32 and the Y-axis rear guide rail 33 and driven by the Y-axis lead screw 34; (The cross slide block 41 and the slide table 42 can be integrated. Two grooves for slidably connecting the Y-axis front guide rail 32 and the Y-axis rear guide rail 33 are arranged on the side of the cross slide block 41 facing the column (cooperating in a linear guide rail manner), and a groove for connecting the Z-axis upper guide rail 53 is arranged on the side of the cross slide block 41 facing the spindle box 51 (cooperating in a linear guide rail manner);

[0081] The spindle box 51 is slidably connected to the cross slide block through the Z-axis upper guide rail 53, slidably connected to the slide table 42 through the Z-axis lower guide rail 54, and driven by the Z-axis lead screw 55 arranged on the slide table 42.

[0082] Further, a plurality of tool sleeves capable of clamping tools are provided in the tool magazine 60. The axis lines of the tool sleeves and the clamped tools are arranged at 90 degrees to the axis line of the main shaft 52. The tool sleeve chain in the tool magazine 60 can rotate circumferentially along the tool magazine 60. The movable tool disc 71 is driven by a left-right drive device 83 to move left and right along the first guide rail 81 and by a front-back drive device 86 to move back and forth along the second guide rail 84, so as to realize the tool exchange with the tools in the tool magazine 60.

[0083] Embodiment 2:

[0084] A horizontal machining center, as Figure 1 shown, includes:

[0085] A base 11, on which an X-axis guide rail 22 is arranged horizontally;

[0086] Two numerical control turntables 21, which are respectively movably arranged on the X-axis guide rail 22 and are driven by two X-axis lead screws 23 to move on the X-axis guide rail 22 (the X-axis lead screws 23 are rotated by motors); A workbench 24 is respectively arranged on the two numerical control turntables 21;

[0087] A column 31, the column 31 is in a square shape with a mouth shape and is connected to the base 11 at the bottom. Two opposite side walls of the column 31 are in a T-shaped structure, as Figure 3 shown, one is the main support part 311, and the other is the auxiliary support part 312. A Y-axis front guide rail 32 and a Y-axis rear guide rail 33 are arranged on both sides of the auxiliary support part. The bearing surface of the Y-axis front guide rail 32 faces the slide table 40, and the bearing surface of the Y-axis rear guide rail 33 faces the direction of the numerical control turntable 21;

[0088] Two main spindle boxes 51, as Figure 2 , Figure 5 described, the two main spindle boxes 51 are respectively slidably connected to the two opposite side walls of the column 31; Specifically, the main spindle box 51 is provided with a Z-axis upper guide rail 53 and a Z-axis lower guide rail 54. The Z-axis upper guide rail 53 is slidably connected to the Y-axis front guide rail 32 through the vertical surface of the cross slider 41 and is slidably connected to the Y-axis rear guide rail 33 through the plane of the cross slider 41; The Z-axis lower guide rail 54 is respectively slidably connected to the Y-axis front guide rail 32 and the Y-axis rear guide rail 33 through the slide table 42 and is driven by a Z-axis lead screw 55 arranged on the slide table 42; The main spindle box 51 is provided with a main shaft 52;

[0089] Two tool magazines 60, which are respectively arranged on the two outer sides of the column 31. A plurality of tool sleeves capable of clamping tools are provided in the tool magazine 60. The axis lines of the tool sleeves and the clamped tools are arranged at 90 degrees to the axis line of the main shaft 52. The tool sleeve chain in the tool magazine 60 can rotate circumferentially along the tool magazine 60, so that the movable tool disc 71 realizes the tool exchange with the tools in the tool magazine 60 through the three-dimensional movement of the moving member 80;

[0090] Two movable cutter heads 71, and the two movable cutter heads 71 are respectively movably arranged on the column 31 through a moving member 80. Four clamping cutter claws 72 distributed in a cross shape are arranged on the movable cutter head 71 along the circumferential direction;

[0091] Among them, as Figure 4 shown, the moving member 80 includes: a first guide rail 81, a first mounting table 82, a left and right driving device 83, a second guide rail 84, a second mounting table 85, a front and rear driving device 86, and a rotation driving device 87. The first guide rail 81 is fixed on the top surface of the column 31, and the first mounting table 82 is slidably connected to the first guide rail 81, and the first mounting table 82 is driven to move on the first guide rail 81 through the left and right driving device 83 (moved by the way of driving a lead screw by a motor); the second mounting table 85 is movably arranged on the first mounting table 82 through the second guide rail 84 and is driven by the front and rear driving device 86; the movable cutter head 71 is rotatably arranged on the second mounting table 85 and is driven by the rotation driving device 87 arranged on the second mounting table 85 (through the connection of gear rotation, the movable cutter head 71 is meshed and connected with the output shaft of the rotation driving device 87).

[0092] Embodiment 3:

[0093] An automatic tool change method for a machining center, used for a double-spindle horizontal machining center implementing Embodiment 1 or Embodiment 2, includes the steps:

[0094] S1. The main shaft moves upward to make the tool enter the clamping cutter claw of the cutter head;

[0095] S2. The main shaft box moves backward along the Z axis to disengage from the tool;

[0096] S3. The cutter head rotates to align the tool to be changed with the axis of the main shaft;

[0097] S4. The main shaft box moves forward along the Z axis to clamp the new tool, and the main shaft box moves downward for subsequent machining;

[0098] S5. The cutter head moves horizontally to dock with the tool magazine;

[0099] S6. The cutter head moves back and forth to complete tool access;

[0100] The cutter head moves horizontally in the direction away from the tool magazine, the tool sleeve rotates back 90 degrees until the axis is perpendicular to the axis of the main shaft, and then the entire tool sleeve chain of the tool magazine can rotate to update the tool position to be changed.

[0101] S7. The tool sleeve of the tool magazine rotates to update the tool position to be changed.

[0102] Specifically, the cutter head rotates 90 degrees each time.

[0103] Further, during the execution of steps S5 - S7, the main spindle can continue with the machining operation, and the tool turret can perform machining and tool changing in parallel by means of the pre - stored tools in multiple tool - clamping claws. The multiple tool - claws can avoid the problem that when the machining time of the tool on the main spindle is too short, the tool turret and the tool magazine do not have enough time to exchange tools. Having multiple tool - claws and multiple reserved tools to be changed on the tool turret can avoid this problem.

[0104] Further, when performing dual - spindle synchronous tool change, the two main spindles move upward simultaneously to dock with the tool turret, and the tool turret rotates to synchronously align the two groups of tools to be changed with the axes of the two main spindles.

[0105] Embodiment 4:

[0106] A machining center, as Figure 6 、 Figure 7 shown, includes:

[0107] A base 11, on which an X - axis guide rail 22 is arranged horizontally;

[0108] Two numerical control turntables 21, which are respectively movably arranged on the X - axis guide rail 22, and are respectively driven by two X - axis lead screws 23 to move on the X - axis guide rail 22 (the X - axis lead screws 23 are rotated by motors); a workbench 24 is respectively arranged on the two numerical control turntables 21;

[0109] A column 31, the column 31 is in a square - shaped opening, and the bottom is connected to the base 11. Two opposite side walls of the column 31 are in a T - shaped structure, one is the main support part 311, and the other is the auxiliary support part 312. A Y - axis front guide rail 32 and a Y - axis rear guide rail 33 are arranged on both sides of the auxiliary support part. The bearing surface of the Y - axis front guide rail 32 faces the slide table 40, and the bearing surface of the Y - axis rear guide rail 33 faces the direction of the numerical control turntable 21;

[0110] Two main - spindle boxes 51, which are respectively slidably connected to two opposite side walls of the column 31; specifically, the main - spindle box 51 is provided with a Z - axis upper guide rail 53 and a Z - axis lower guide rail 54. The Z - axis upper guide rail 53 is slidably connected to the Y - axis front guide rail 32 through the vertical surface of the cross - slide block 41, and is slidably connected to the Y - axis rear guide rail 33 through the plane of the cross - slide block 41; the Z - axis lower guide rail 54 is respectively slidably connected to the Y - axis front guide rail 32 and the Y - axis rear guide rail 33 through the slide table 42, and is driven by a Z - axis lead screw 55 arranged on the slide table 42; a main spindle 52 is arranged on the main - spindle box 51;

[0111] A tool magazine 60, which is arranged above the front side of the column 31.

[0112] There are dozens of tool - clamping claws 72 on the tool magazine 60, and the distance between the two main spindles 52 is the same as the distance between several tool - clamping claws 72 (in this embodiment, preferably, the distance between 8 tool - clamping claws 72 is equal to the distance between the main spindles 52)

[0113] When changing the tool, the two spindles 52 move upward so that the tool holders 72 of the tools on the two spindles 52 simultaneously enter the tool clamping claws at the tool waiting position in the tool magazine 60. Then, the two spindles 52 simultaneously move backward along the Z-axis direction to completely expose the tool from the spindles 52. The tool magazine 60 is rotated to align the tool to be changed with the spindles 52. The two spindles 52 move forward along the Z-axis to make the tool enter the taper shank of the spindles 52 and be tightened. Then, the spindles 52 can move downward to perform subsequent machining.

[0114] Such an automatic tool changing mechanism is simpler and more reliable.

[0115] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A horizontal machining center, characterized in that: include: Base; At least one CNC turntable, the CNC turntable is slidably connected to the base via an X-axis guide rail; A column, wherein the column is fixed on the base, and a Y-axis front guide rail and a Y-axis rear guide rail are arranged in the column; At least one spindle box, the spindle box is provided with a Z-axis upper guide rail and a Z-axis lower guide rail, the Z-axis upper guide rail is slidably connected to the Y-axis front guide rail through the vertical surface of the cross slider, and is slidably connected to the Y-axis rear guide rail through the plane of the cross slider; the Z-axis lower guide rail is slidably connected to the Y-axis front guide rail and the Y-axis rear guide rail respectively through a slide table, and the spindle box is provided with a spindle; At least one tool magazine, the tool magazine is fixed on the outside of the column; At least one movable cutter disc, the movable cutter disc being movably arranged on the column through a movable member, and the movable cutter disc being provided with a plurality of cutter clamping claws along a circumferential direction; Wherein, the movable part includes: a first guide rail, a first mounting platform, a left and right driving device, a second guide rail, a second mounting platform, a front and rear driving device, and a rotation driving device. The first guide rail is fixed to the top surface of the column, and the first mounting platform is slidably connected to the first guide rail and driven by the left and right driving device; the second mounting platform is movably set on the first mounting platform through the second guide rail and driven by the front and rear driving device; the movable cutter disc is rotatably set on the second mounting platform and driven by the rotation driving device set on the second mounting platform.

2. The horizontal machining center according to claim 1, characterized in that: The top view shape of the column is a T-shaped structure, with a main support part and an auxiliary support part on both sides; the Y-axis front guide rail and the Y-axis rear guide rail are respectively arranged on the front and rear sides of the main support part, the bearing surface of the Y-axis front guide rail faces the direction of the CNC turntable, and the bearing surface of the Y-axis rear guide rail faces the direction of the slide.

3. The horizontal machining center according to claim 1, characterized in that: The movable cutter disc is provided with four tool clamping claws distributed in a cross shape, one of which is configured to receive the spindle return tool of the spindle box, and the other tool clamping claws can simultaneously clamp the tool to be replaced; the rotary drive device drives the movable cutter disc to rotate through a gear set.

4. The horizontal machining center according to claim 1, characterized in that: The CNC turntable is slidably connected to the X-axis guide rail and driven by the X-axis driving screw; The cross slide is slidably connected to the front guide rail of the Y-axis, and the cross slide is slidably connected to the rear guide rail of the Y-axis; The slide table is slidably connected to the Y-axis front guide rail and the Y-axis rear guide rail respectively, and is driven by the Y-axis lead screw; The spindle box is slidably connected to the cross slide block via the Z-axis upper guide rail, is slidably connected to the slide table via the Z-axis lower guide rail, and is driven by the Z-axis lead screw.

5. The horizontal machining center according to claim 1, characterized in that: The tool magazine is provided with a plurality of tool sleeves for clamping tools. The axis center lines of the tool sleeves and the clamped tools are arranged at 90 degrees to the axis center line of the spindle. The tool sleeve chain in the tool magazine can rotate along the circumference of the tool magazine.

6. An automatic tool changing method for a horizontal machining center based on any one of claims 1 to 5, characterized in that: Includes steps: S1. The spindle moves upward to allow the tool to enter the clamping claw of the cutter disc; S2. The spindle box moves backward along the Z axis to disengage the tool; S3. The cutter head rotates to align the tool to be replaced with the spindle axis; S4. The Z axis of the spindle box moves forward to clamp the new tool, and the spindle box moves down for subsequent processing; S5. The cutter head moves horizontally to connect with the tool magazine; S6. The cutter head moves forward and backward to complete the tool storage and retrieval; S7. The tool magazine tool holder rotates to update the tool position to be changed.

7. A machining center, characterized in that: include Base; Two CNC turntables, the two CNC turntables are respectively slidably connected to the base via X-axis guide rails; A column, wherein the column is arranged on the base, and a Y-axis front guide rail and a Y-axis rear guide rail are arranged in the column; Two spindle boxes, the two spindle boxes are slidably connected to the two opposite side walls of the column respectively; the spindle box is provided with a Z-axis upper guide rail and a Z-axis lower guide rail, the Z-axis upper guide rail is slidably connected to the Y-axis front guide rail through the vertical surface of the cross slider, and is slidably connected to the Y-axis rear guide rail through the plane of the cross slider; the Z-axis lower guide rail is slidably connected to the Y-axis front guide rail and the Y-axis rear guide rail respectively through a slide table, and the spindle is provided on the spindle box; A tool magazine is arranged above the front side of the column.

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