Double-workbench horizontal machining center

Abstract

The utility model discloses a double-workbench horizontal machining center which comprises a base and a stand column. A main shaft mechanism is in sliding connection with a Y-axis guide rail arranged on the middle side of the stand column. Wherein a working area is arranged in front of the main shaft mechanism; when the first driving mechanism drives the first workbench to move to the working area in the X-axis direction, a machining tool arranged on the main shaft mechanism machines a blank machined part placed on the first workbench, and the end, located on the X-axis guide rail, of the second workbench is located in the non-working area. When the second driving mechanism drives the second working table to move to the working area in the X-axis direction, a machining tool arranged on the main shaft mechanism machines a blank machined part placed on the second working table, and the end, located on the X-axis guide rail, of the first working table is located in a non-working area. The working mode of switching the double workbenches can be achieved, the reliability of switching the workbenches is greatly improved, and the failure rate is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of machine tools, in particular to a double-worktable horizontal machining center. Background Art

[0002] The current horizontal machining center double worktable exchange methods mainly include reciprocating and rotary types:

[0003] Reciprocating type: There are two exchange arms that can move back and forth. When the first workbench needs to be exchanged out inside the machine, the first exchange arm extends into the machine, the positioning locking mechanism between the CNC turntable inside the machine and the first workbench is released, the exchange arm lifts the first workbench, and then the exchange arm retracts to drag the first workbench out of the machine.

[0004] Then the axial feed mechanism in the machine moves the CNC turntable with the locking mechanism to the position aligned with the second exchange arm. The second exchange arm moves the second workbench into the machine. After reaching the top of the CNC turntable, the exchange arm drops the second workbench with it. Then the positioning locking mechanism of the CNC turntable locks the second workbench to complete the workbench exchange.

[0005] Rotary: When the worktable needs to be exchanged, the positioning locking mechanism of the CNC turntable is released, and the exchange arm lifts the internal and external worktables at the same time, rotates them 180 degrees, and then drops them. The positioning locking mechanism locks the internal worktable.

[0006] Both types of horizontal machining centers with dual worktables require several positioning blocks with locking mechanisms between the worktable and the CNC turntable. Each exchange is accompanied by the disengagement and re-positioning and locking between the worktable and the CNC turntable, which will inevitably lead to slight deviations in repeatable positioning accuracy, which will have a certain impact on high-precision machining. In addition, each exchange is accompanied by the disengagement, re-positioning and locking of the positioning blocks, which often makes it difficult to ensure the reliability of the dual worktable exchange. Especially after a period of use, the failure rate of the worktable exchange mechanism will be relatively high, and the time consumed to complete the exchange process is relatively long, which significantly affects the processing efficiency in high-speed, fast-beat machining situations.

[0007] Therefore, designing a double-table horizontal machining center with high precision, good reliability, low failure rate and high efficiency has become a technical problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0008] In view of the above-mentioned shortcomings or deficiencies of the prior art, the technical problem to be solved by the present application is to provide a double-worktable horizontal machining center.

[0009] To solve the above technical problems, this application is implemented through the following technical solutions:

[0010] A double-table horizontal machining center, comprising:

[0011] A base, wherein the base is provided with an X-axis guide rail;

[0012] A column, the column is arranged on the base, and the column is provided with a Y-axis guide rail;

[0013] A spindle mechanism, the spindle mechanism being arranged on a Y-axis slide of the Y-axis guide rail, and a front end of the spindle mechanism clamping a machining tool;

[0014] a first driving mechanism, the first driving mechanism being mounted on the base and the first working table being rotatably connected to the first driving mechanism;

[0015] a second driving mechanism, the second driving mechanism being mounted on the base and rotatably connected to a second workbench;

[0016] In which, the front of the spindle mechanism is set as a working area; when the first driving mechanism drives the first worktable to move along the X-axis to the working area, the machining tool arranged on the spindle mechanism processes the blank workpiece placed on the first worktable, and the second worktable is located at one end of the X-axis guide rail and is in a non-working area; when the second driving mechanism drives the second worktable to move along the X-axis to the working area, the machining tool arranged on the spindle mechanism processes the blank workpiece placed on the second worktable, and the first worktable is located at the other end of the X-axis guide rail and is in a non-working area.

[0017] Furthermore, it also includes: a shell, which is fixed on the base, and is provided with a first isolation and protection mechanism and a second isolation and protection mechanism. The first isolation and protection mechanism is arranged on one side of the shell for isolating and protecting the first workbench, and the second isolation and protection mechanism is arranged on the other side of the shell for isolating and protecting the second workbench.

[0018] Furthermore, the first isolation and protection mechanism and the second isolation and protection mechanism are both configured as arc door structures, and the axis of the arc door structure is set in the non-processing area of ​​the first workbench and the second workbench; when the second workbench is in the working area to process the workpiece and the first workbench is in the non-working area and needs to replace the blank, the first isolation and protection mechanism rotates to between the non-working area and the working area of ​​the first workbench, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the first workbench in the non-working area and the external space are also opened, and the operator or robot can replace the part blank. After the replacement is completed, the first isolation and protection mechanism is closed, and the channel for the first workbench to move to the working area is also made free. When the workpiece of the second workbench is processed and returns to the non-working area, the first workbench immediately enters the working area to start processing.

[0019] After the second workbench reaches the non-working area, the second isolation and protection mechanism rotates between the non-working area and the working area of ​​the second workbench, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the second workbench in the non-working area and the external space are also opened, and the operator or robot can replace the part blank. After the replacement is completed, the second isolation and protection mechanism is closed, and at the same time, the channel for the second workbench to move to the working area is made free. After the first workbench leaves the working area, the second workbench can immediately enter the working area to start processing.

[0020] Furthermore, the first isolation and protection mechanism includes: a first isolation door and a first protection door, the first isolation door and the first protection door are arranged in the shell, when the second workbench is in the working area to process the workpiece and the first workbench is in the non-working area and needs to replace the blank, the first isolation door rotates to between the non-working area and the working area of ​​the first workbench, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the first protection door can be opened, and the first workbench in the non-working area and the external space are also opened at the same time, and the part blank can be replaced by the operator or robot. After the replacement is completed, the first protection door is closed, and then the first isolation door is also rotated back to its original position, so as to make way for the first workbench to move to the working area. When the workpiece of the second workbench is processed and returns to the non-working area, the first workbench immediately enters the working area to start processing.

[0021] Furthermore, the second isolation and protection mechanism includes: a second isolation door and a second protection door, the second isolation door and the second protection door are arranged in the shell, when the first workbench is in the working area to process the workpiece and the second workbench is in the non-working area and needs to replace the blank, the second isolation door rotates to between the non-working area and the working area of ​​the first workbench, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the second protection door can be opened, and the second workbench in the non-working area and the external space are opened. The operator or robot can replace the part blank. After the replacement is completed, the second protection door is closed, and then the second isolation door is also rotated back to its original position, which can make way for the second workbench to move to the working area. When the workpiece of the first workbench is processed and returns to the non-working area, the second workbench immediately enters the working area to start processing.

[0022] Furthermore, a rotating portion is provided at the upper end or the lower end of the arc door structure, and a fixed guide rail that rotates in matching relationship with the rotating portion is provided at the upper end or the lower end of the shell.

[0023] Furthermore, baffles are symmetrically provided on both sides of the first isolation and protection mechanism and the second isolation and protection mechanism.

[0024] Furthermore, the first isolation and protection mechanism and the second isolation and protection mechanism both include: a standby sliding door structure and a standby lifting door structure, wherein the standby sliding door structure is slidably mounted on the outside of the shell, and the standby lifting door structure is mounted inside the shell. When the second workbench is in the working area to process the workpiece and the first workbench is in the non-working area and needs to replace the blank, the first standby lifting door structure descends to between the non-working area and the working area of ​​the first workbench, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the first standby sliding door structure can be opened, and the first workbench in the non-working area is also opened to the outside space, so that the operator or robot can replace the part blank. After the replacement is completed, the first standby sliding door structure is closed, and then the first standby lifting door structure is raised to make way for the first workbench to move to the working area. When the workpiece of the second workbench is processed and returns to the non-working area, the first workbench immediately enters the working area to start processing. After the second workbench arrives at the non-working area, the second standby lifting door structure descends between the non-working area and the working area of ​​the second workbench, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the second standby sliding door structure can be opened, and the second workbench in the non-working area and the external space are opened at the same time, and the operator or robot can replace the part blank. After the replacement is completed, the second standby sliding door structure is closed, and then the second standby lifting door structure is raised to make way for the second workbench to move to the working area. After the first workbench leaves the working area, the second workbench can immediately enter the working area to start processing.

[0025] Furthermore, the standby sliding door structure is horizontally installed in a slide groove provided on one side of the shell, and the standby lifting door structure is vertically installed in a mounting groove of the shell.

[0026] Furthermore, the first driving mechanism also includes: a first driving motor, a first X-axis screw and a first CNC turntable, the first driving motor is fixedly installed in the base, the first CNC turntable is slidably installed on the X-axis guide rail, the first X-axis screw is located between the first CNC turntable and the base, and the first driving motor is connected to the first X-axis screw to drive the first CNC turntable to move left and right along the X-axis guide rail.

[0027] Furthermore, the second driving mechanism also includes: a second driving motor, a second X-axis screw and a second CNC turntable, the second driving motor is fixedly installed in the base, the second CNC turntable is slidably installed on the X-axis guide rail, the second X-axis screw is located between the first CNC turntable and the base, and the second driving motor is connected to the second X-axis screw to drive the second CNC turntable to move left and right along the X-axis guide rail.

[0028] Furthermore, the first drive motor and the second drive motor are arranged on the same side or in opposite directions.

[0029] Furthermore, the spindle mechanism includes: a spindle and a spindle box, the spindle is arranged in the spindle box, the spindle box is arranged on the Y-axis slide of the Y-axis guide rail, and the third drive mechanism arranged on the column drives the Y-axis slide to move up and down on the Y-axis guide rail.

[0030] Furthermore, a Z-axis guide rail is provided on one side of the spindle box, and the spindle box is slidably connected to the Y-axis slide seat via a guide rail slider provided on the Z-axis guide rail. The spindle box is driven by a fourth driving mechanism to move forward and backward along the Z-axis guide rail.

[0031] Furthermore, the fourth driving mechanism includes: a fourth driving motor and a Z-axis screw rod arranged on the Y-axis slide, and the nut of the screw rod is connected to the spindle box to drive the spindle box to move forward and backward along the Z-axis direction.

[0032] Furthermore, a Z-axis guide rail is provided on the base, and a fourth driving mechanism is provided between the column and the base for driving the column to move forward and backward along the Z-axis guide rail.

[0033] Compared with the existing technology, this application has the following technical effects:

[0034] (1) In this application, the dual-table exchange mode can be realized without the need for exchange arms, positioning locks, and rotary exchange or shuttle exchange mechanisms, which greatly improves the reliability of the table exchange and further reduces the failure rate. At the same time, the exchange speed can be greatly increased, further improving the processing efficiency of the machine tool.

[0035] (2) In the present application, since there is no need for positioning and locking to repeatedly lock, release, and re-lock the workbench, slight changes in the accuracy of the machining center are avoided, thereby further improving the accuracy of the machining center in processing blanks.

[0036] (3) In the present application, when the first isolation protection mechanism and the second isolation protection mechanism provided on the shell are closed, the interior of the machine tool, whether the working area or the non-working area, can be isolated from the outside, isolating the cutting fluid and metal chips splashed from the blank being processed while ensuring the safety of the operator during the work process and the cleanliness of the workplace, thus playing a good protective role; when the first isolation protection mechanism and the second isolation protection mechanism are opened, they can also isolate the splashing cutting fluid and metal chips, and open the non-working area, so that the operator, manipulator or industrial robot can smoothly replace the blank of the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0038] Figure 1 : A schematic structural diagram of a double-worktable horizontal machining center according to a first embodiment of the present invention;

[0039] Figure 2 : Schematic diagram of the partial structure of a double-worktable horizontal machining center according to the first embodiment of the present invention;

[0040] Figure 3 : Schematic diagram of the partial structure of a double-worktable horizontal machining center according to the first embodiment of the present invention;

[0041] Figure 4 : A schematic diagram of the partial structure of the housing of a double-table horizontal machining center according to the first embodiment of the present invention;

[0042] Figure 5 : A schematic structural diagram of a double-worktable horizontal machining center according to a second embodiment of the present invention;

[0043] Figure 6 : A schematic structural diagram of a double-worktable horizontal machining center according to a third embodiment of the present invention;

[0044] Figure 7: Schematic diagram of the local structure of the fourth embodiment of the utility model double workbench horizontal machining center. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] Example 1

[0047] like Figure 1 As shown, in this embodiment, a double-table horizontal machining center includes:

[0048] A base 1, wherein an X-axis guide rail 3 is provided on the base 1;

[0049] A column 2, the column 2 is fixedly arranged on the base 1, and a Y-axis guide rail 25 is provided on the column 2;

[0050] A spindle mechanism, the spindle mechanism is arranged on the Y-axis slide 113 of the Y-axis guide rail 25, and the front end of the spindle mechanism clamps a machining tool;

[0051] A first driving mechanism, the first driving mechanism being mounted on one end of the base 3 and having a first workbench 9 rotatably connected thereto;

[0052] A second driving mechanism, the second driving mechanism is mounted on the other end of the base 1, and a second workbench 7 is rotatably connected to the second driving mechanism;

[0053] The front of the spindle mechanism is set as a working area; when the first drive mechanism drives the first worktable 9 to move along the X-axis to the working area, the machining tool set on the spindle mechanism processes the rough workpiece placed on the first worktable 9, and the second worktable 7 is located at one end of the X-axis guide rail 3 in a non-working area, and the second worktable 7 is in a standby state; the second worktable 7 is driven to move along the X-axis to the working area, and the machining tool set on the spindle mechanism processes the rough workpiece placed on the second worktable 7, and the first worktable 9 is located at one end of the X-axis guide rail 3 in a non-working area, and the first worktable 9 is in a standby state. Through the above-mentioned setting, the working mode of dual worktable exchange can be realized without the need for exchange arms, positioning locking, and rotary exchange or shuttle exchange mechanisms, which greatly improves the reliability of worktable exchange and further reduces the failure rate. At the same time, the exchange speed can be greatly improved, further improving the processing efficiency of the machine tool.

[0054] Furthermore, in this embodiment, the double-worktable horizontal machining center also includes: a shell 18, the shell 18 is fixed on the base 1, and the shell 18 is provided with a first isolation and protection mechanism 12 and a second isolation and protection mechanism 13, the first isolation and protection mechanism 12 is arranged on one side of the shell 18 for isolating and protecting the first worktable 9, and the second isolation and protection mechanism 13 is arranged on the other side of the shell 18 for isolating and protecting the second worktable 7.

[0055] Furthermore, in this embodiment, the leftmost part of the travel of the first workbench 9 is a non-working area, the rightmost part of the travel of the second workbench 7 is a non-working area, the first isolation and protection mechanism 12 is arranged in the non-working area of ​​the first workbench 9, and the second isolation and protection mechanism 13 is arranged in the non-working area of ​​the second workbench 7.

[0056] Preferably, if Figure 2 and Figure 4As shown, in this embodiment, the first isolation and protection mechanism 12 and the second isolation and protection mechanism 13 are configured as an arc door structure, the axis of the arc door structure is set in the non-processing area of ​​the first workbench 9 and the second workbench 7, the upper end or the lower end of the arc door structure is provided with a rotating part, and the shell 18 is provided with a fixed guide rail 28 that slides in matching with the upper end or the lower end of the rotating part. When the first isolation and protection mechanism 12 is rotated inward to between the non-working area of ​​the first workbench 9 and the working area, the first isolation and protection mechanism 12 opens the space between the first workbench 9 and the outside, and at the same time forms an isolation barrier between the non-working area of ​​the first workbench 9 and the working area to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the space between the first workbench 9 in the non-working area and the outside is also opened, and the part blank can be replaced by an operator or a robot. After the replacement is completed, the first isolation and protection mechanism 12 The protective mechanism 12 is closed, and at the same time, it also makes way for the first workbench 9 to move to the working area. When the workpiece on the second workbench 7 is processed and returns to the non-working area, the first workbench 9 immediately enters the processing area to start processing; the second isolation protective mechanism 13 is set in the non-working area of ​​the second workbench 7. When the second isolation protective mechanism 13 rotates inward to between the non-working area and the working area of ​​the second workbench 7, the second isolation protective mechanism 13 opens the space between the second workbench 7 and the outside, and at the same time forms an isolation barrier between the non-working area of ​​the second workbench 7 and the working area to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the second workbench 7 in the non-processing area and the outside space are also opened at the same time, and the operator or robot can replace the part blank. After the replacement is completed, the second isolation protective mechanism 13 is closed, and at the same time, it makes way for the second workbench 7 to move to the working area.

[0057] Furthermore, in this embodiment, the dual-table horizontal machining center further includes: a control center 19 , which is disposed on the housing 18 and is used to control the operation of the first drive mechanism, the second drive mechanism, and the third drive mechanism 21 .

[0058] Further, if Figure 3 As shown, in this embodiment, the first driving mechanism includes: a first driving motor 24, a first X-axis screw rod 5 and a first CNC turntable 8, the first driving motor 24 is fixedly installed in the base 1 through a fixed bracket, the first CNC turntable 8 is slidably installed on the X-axis guide rail 3, the first X-axis screw rod 5 is located between the first CNC turntable 8 and the base 1, and the first driving motor 24 is connected to the first X-axis screw rod 5 to drive the first CNC turntable 8 to move left and right along the X-axis guide rail 3.

[0059] Furthermore, in this embodiment, the second driving mechanism includes: a second driving motor 23, a second X-axis screw rod 4 and a second CNC turntable 6, the second driving motor 23 is fixedly installed in the base 1 through a fixed bracket, the second CNC turntable 6 is slidably installed on the X-axis guide rail 3, the second X-axis screw rod 4 is located between the second CNC turntable 6 and the base 1, and the second driving motor 23 is connected to the second X-axis screw rod 4 for driving the second CNC turntable 6 to move left and right along the X-axis guide rail 3.

[0060] Preferably, in this embodiment, the first drive motor 24 is arranged in opposite directions to the second drive motor 23. The above arrangement is conducive to more reasonable utilization of the space inside the base, making it more neat and beautiful.

[0061] Furthermore, in this embodiment, in addition to using a drive motor to drive the lead screw to drive the CNC turntable to move left and right along the X-axis guide rail, the first drive mechanism and the second drive mechanism can also use a linear motor to directly drive the CNC turntable to move left and right along the X-axis guide rail. This application does not make specific restrictions on this driving method, and it is sufficient to be able to drive left and right movement.

[0062] Furthermore, in this embodiment, the spindle mechanism includes: a spindle 10 and a spindle box 11. The spindle 10 is disposed within the spindle box 11. The spindle box 11 is slidably connected to a Y-axis guide rail 25 disposed on the middle side of the column 2 via a Y-axis slide. A third drive mechanism 21 disposed on the column 2 drives the Y-axis slide 113 to move up and down along the Y-axis guide rail 25. Through the above arrangement, the spindle box 11 can be controlled to move up and down along the column 2. A drag chain 22 for threading cables and oil pipes is also connected to the rear end of the spindle box 11.

[0063] Furthermore, in some embodiments, in addition to using a driving motor to drive the screw to drive the Y-axis slide with the spindle box to move up and down along the Y-axis guide rail, the third driving mechanism can also use a linear motor to directly drive the Y-axis slide with the spindle box to move up and down along the Y-axis guide rail. This application does not make specific limitations on this driving method, and it is sufficient that it can achieve the driving up and down movement.

[0064] Furthermore, in this embodiment, a Z-axis guide rail 111 is further provided on one side of the spindle box 11. The spindle box 11 is slidably connected to the Y-axis guide rail 25 via a guide rail slider 112 provided on the Z-axis guide rail 111. The fourth drive mechanism is provided between the spindle box 11 and the Y-axis slide 113, and the fourth drive mechanism drives the spindle box 11 to move forward and backward along the Z-axis guide rail 111. The above arrangement facilitates better control of the forward and backward feeding of the spindle box 11 along the Y-axis guide rail 25, thereby ensuring that the machine tool completes normal processing operations.

[0065] Preferably, in this embodiment, the fourth drive mechanism includes: a fourth drive motor and a Z-axis screw rod arranged on the Y-axis slide 113, and the nut of the Z-axis screw rod is connected to the spindle box 11, which is used to drive the spindle box 11 to move back and forth along the Z-axis guide rail 111.

[0066] Furthermore, in some embodiments, in addition to using a driving motor to drive the screw to drive the spindle box to move back and forth along the Z-axis guide rail, the fourth driving mechanism can also use a linear motor to directly drive the spindle box to move back and forth along the Z-axis guide rail. This application does not make specific limitations on this driving method, as long as it can achieve driving forward and backward movement.

[0067] Preferably, in this embodiment, when the first workbench 9 is processing in the working area, a rough workpiece is clamped on the first workbench 9. The first workbench 9 moves left and right along the X-axis guide rail 3 under the drive of the first X-axis screw 5. The spindle 10 rotates with the tool and can move up and down along the Y-axis guide rail 25 at the same time. The spindle box 11 is controlled to feed forward and backward along the Z-axis guide rail 111 to process one side of the rough workpiece on the first workbench 9. After processing one side, the first workbench 9 can be rotated under the drive of the first CNC turntable 8 to allow the spindle 10 to process the other side of the rough workpiece until all the sides of the rough workpiece that need to be processed are processed. When the first workbench 9 is in the processing area, the second workbench 7 is in the non-working area. The operator is clamping the blank of the workpiece on the second workbench 7. At this time, the second arc door 13 is in the open state. While the second arc door 13 is open to provide the operator with a working space, the second arc door 13 also serves to isolate the non-working area from the working area, and can block the cutting fluid and metal chips splashed during the processing in the working area, so that the operator can easily replace the blank of the workpiece. When the blank on the second workbench 7 is clamped, the second arc door 13 is closed. At this time, the second arc door 13 not only clears the way for the second workbench 7 to move from the non-working area to the working area, but also serves to isolate the inside and outside of the machine, so that the cutting fluid and metal chips in the working area during the processing will not splash out.

[0068] Preferably, in this embodiment, the fixed guide rail 28 is covered with a cover plate 20 to prevent cutting fluid and metal chips from splashing out during the processing and to prevent external dust from falling into the first isolation and protection mechanism 12 and the second isolation and protection mechanism 13.

[0069] Preferably, in this embodiment, baffles are symmetrically provided on both sides of the first arc door 12 and the second arc door 13. When the first arc door 12 and the second arc door 13 are closed, the baffles are closed on the outside of the first arc door 12 and the second arc door 13, and can block the cutting fluid and metal chips splashed from the hollow parts of the first arc door 12 and the second arc door 13 during processing, thereby better protecting the operator and activating the secondary protection function; when the first arc door 12 and the second arc door 13 are opened, the baffles retract inward, and the outermost end is in an obtuse angle open state, which is conducive to the operator to more conveniently replace or insert the blank and the blank workpiece.

[0070] Example 2

[0071] like Figure 5 As shown, in this embodiment, a double-table horizontal machining center includes:

[0072] A base 1, wherein an X-axis guide rail 3 is provided on the base 1;

[0073] A column 2, the column 2 is fixedly arranged on the base 1, and a Y-axis guide rail 25 is provided on the column 2;

[0074] A spindle mechanism, the spindle mechanism is arranged on the Y-axis slide 113 of the Y-axis guide rail 25, and the front end of the spindle mechanism clamps a machining tool;

[0075] A first driving mechanism, the first driving mechanism being mounted on one end of the base 3 and having a first workbench 9 rotatably connected thereto;

[0076] A second driving mechanism, the second driving mechanism is mounted on the other end of the base 1, and a second workbench 7 is rotatably connected to the second driving mechanism;

[0077] The front of the spindle mechanism is set as a working area; when the first drive mechanism drives the first worktable 9 to move along the X-axis to the working area, the machining tool set on the spindle mechanism processes the rough workpiece placed on the first worktable 9, and the second worktable 7 is located at one end of the X-axis guide rail 3 in a non-working area, and the second worktable 7 is in a standby state; the second worktable 7 is driven to move along the X-axis to the working area, and the machining tool set on the spindle mechanism processes the rough workpiece placed on the second worktable 7, and the first worktable 9 is located at one end of the X-axis guide rail 3 in a non-working area, and the first worktable 9 is in a standby state. Through the above-mentioned setting, the working mode of dual worktable exchange can be realized without the need for exchange arms, positioning locking, and rotary exchange or shuttle exchange mechanisms, which greatly improves the reliability of worktable exchange and further reduces the failure rate. At the same time, the exchange speed can be greatly improved, further improving the processing efficiency of the machine tool.

[0078] Furthermore, in this embodiment, the double-worktable horizontal machining center also includes: a shell 18, the shell 18 is fixed on the base 1, and the shell 18 is provided with a first isolation and protection mechanism 12 and a second isolation and protection mechanism 13, the first isolation and protection mechanism 12 is arranged on one side of the shell 18 for isolating and protecting the first worktable 9, and the second isolation and protection mechanism 13 is arranged on the other side of the shell 18 for isolating and protecting the second worktable 7.

[0079] Furthermore, in this embodiment, the leftmost portion of the travel of the first workbench 9 is a non-working area, the rightmost portion of the travel of the second workbench 7 is a non-working area, and the first isolation and protection mechanism 12 is arranged in the non-working area of ​​the first workbench 9 .

[0080] Furthermore, in this embodiment, the first isolation and protection mechanism 12 and the second isolation and protection mechanism 13 both include: a standby sliding door structure and a standby lifting door structure, the standby sliding door structure is slidably installed on the outside of the shell 18, and the standby lifting door structure is installed inside the shell 18.

[0081] Preferably, in this embodiment, when the second workbench 7 is in the working area to process the workpiece and the first workbench 9 is in the non-working area and needs to replace the blank, the first standby lifting door 16 descends to the non-working area and the working area of ​​the first workbench 9, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the first standby sliding door 14 can be opened, and the first workbench 9 in the non-working area and the external space are also opened. The operator or robot can replace the part blank. After the replacement is completed, the first standby sliding door 14 is closed, and then the first standby lifting door 16 is raised to make way for the first workbench 9 to move to the working area. When the workpiece of the second workbench 7 is processed and returns to the non-working area, the first workbench 9 immediately enters the working area to start processing. After the second workbench 7 arrives at the non-working area, the second standby lifting door 17 descends between the non-working area and the working area of ​​the second workbench 7, forming an isolation barrier to prevent metal chips and cutting fluid from splashing out of the working area. At this time, the second standby sliding door 17 can be opened, and at the same time, the second workbench 7 in the non-working area and the external space are opened, and the operator or robot can replace the part blank. After the replacement is completed, the second standby sliding door 15 is closed, and then the second standby lifting door 17 is raised to make way for the second workbench 7 to move to the working area. After the first workbench 9 leaves the working area, the second workbench 7 can immediately enter the working area to start processing.

[0082] Furthermore, in this embodiment, the dual-table horizontal machining center further includes: a control center 19 , which is disposed on the housing 18 and is used to control the operation of the first drive mechanism, the second drive mechanism, and the third drive mechanism 21 .

[0083] Further, if Figure 3 As shown, in this embodiment, the first driving mechanism includes: a first driving motor 24, a first X-axis screw rod 5 and a first CNC turntable 8, the first driving motor 24 is fixedly installed in the base 1 through a fixed bracket, the first CNC turntable 8 is slidably installed on the X-axis guide rail 3, the first X-axis screw rod 5 is located between the first CNC turntable 8 and the base 1, and the first driving motor 24 is connected to the first X-axis screw rod 5 to drive the first CNC turntable 8 to move left and right along the X-axis guide rail 3.

[0084] Furthermore, in this embodiment, the second driving mechanism includes: a second driving motor 23, a second X-axis screw rod 4 and a second CNC turntable 6, the second driving motor 23 is fixedly installed in the base 1 through a fixed bracket, the second CNC turntable 6 is slidably installed on the X-axis guide rail 3, the second X-axis screw rod 4 is located between the second CNC turntable 6 and the base 1, and the second driving motor 23 is connected to the second X-axis screw rod 4 for driving the second CNC turntable 6 to move left and right along the X-axis guide rail 3.

[0085] Preferably, in this embodiment, the first drive motor 24 is arranged in opposite directions to the second drive motor 23. The above arrangement is conducive to more reasonable utilization of the space inside the base, making it more neat and beautiful.

[0086] Furthermore, in this embodiment, in addition to using a drive motor to drive the lead screw to drive the CNC turntable to move left and right along the X-axis guide rail, the first drive mechanism and the second drive mechanism can also use a linear motor to directly drive the CNC turntable to move left and right along the X-axis guide rail. This application does not make specific restrictions on this driving method, and it is sufficient to be able to drive left and right movement.

[0087] Furthermore, in this embodiment, the spindle mechanism includes: a spindle 10 and a spindle box 11. The spindle 10 is disposed within the spindle box 11. The spindle box 11 is slidably connected to a Y-axis guide rail 25 disposed on the middle side of the column 2 via a Y-axis slide. A third drive mechanism 21 disposed on the column 2 drives the Y-axis slide 113 to move up and down along the Y-axis guide rail 25. This arrangement facilitates better control of the spindle box 11's vertical movement along the column 2. A drag chain 22 for threading cables and oil pipes is also connected to the rear end of the spindle box 11.

[0088] Preferably, in this embodiment, the third driving mechanism 21 is connected, and the third driving mechanism includes: a third driving motor 211 and a third driving screw 212, and the third driving screw 212 drives the Y-axis slide 113 on the Y-axis guide rail 25 to move up and down.

[0089] Furthermore, in this embodiment, in addition to using a driving motor to drive the screw to drive the Y-axis slide with the spindle box to move up and down along the Y-axis guide rail, the third driving mechanism can also use a linear motor to directly drive the Y-axis slide with the spindle box to move up and down along the Y-axis guide rail. This application does not make specific restrictions on this driving method, and it is sufficient to be able to achieve the driving up and down movement.

[0090] Furthermore, in this embodiment, a Z-axis guide rail 111 is further provided on one side of the spindle box 11. The spindle box 11 is slidably connected to the Y-axis guide rail 25 via a guide rail slider 112 provided on the Z-axis guide rail 111. The fourth drive mechanism is provided between the spindle box 11 and the Y-axis slide 113, and the fourth drive mechanism drives the spindle box 11 to move forward and backward along the Z-axis guide rail 111. The above arrangement facilitates better control of the forward and backward feeding of the spindle box 11 along the Y-axis guide rail 25, thereby ensuring that the machine tool completes normal processing operations.

[0091] Preferably, in this embodiment, the fourth drive mechanism includes: a fourth drive motor and a Z-axis screw rod arranged on the Y-axis slide 113, and the nut of the Z-axis screw rod is connected to the spindle box 11, which is used to drive the spindle box 11 to move back and forth along the Z-axis guide rail 111.

[0092] Furthermore, in some embodiments, in addition to using a driving motor to drive the screw to drive the spindle box to move back and forth along the Z-axis guide rail, the fourth driving mechanism can also use a linear motor to directly drive the spindle box to move back and forth along the Z-axis guide rail. This application does not make specific limitations on this driving method, as long as it can achieve driving forward and backward movement.

[0093] Furthermore, in some embodiments, the standby sliding door structure is horizontally installed in a slide groove provided on one side of the shell, and the standby lifting door structure is vertically installed in a mounting groove of the shell.

[0094] Preferably, in this embodiment, when the first workbench 9 is processing in the working area, a blank workpiece is clamped on the first workbench 9. Driven by the first X-axis screw 5, the first workbench 9 moves left and right along the X-axis guide rail 3. The spindle 10 rotates with the tool and can simultaneously move up and down along the Y-axis guide rail 25 to process one side of the blank workpiece on the first workbench 99. After processing one side, the first workbench 9, driven by the first CNC turntable 8, can rotate an angle, allowing the spindle 10 to process the other side of the blank workpiece until all the sides of the blank workpiece that need to be processed are processed. When the first workbench 9 is processed and moved to the first non-working area, the second workbench 7 can be immediately moved to the working area to begin processing. At this time, the first standby lifting door 16 drops and the first standby sliding door 14 opens, and the operator removes the processed blank workpiece and replaces it with a new one.

[0095] When the first workbench 9 is processing in the working area and the second workbench 7 is in the non-working area, the second standby lift door 17 falls to isolate the working area from the second non-working area. The second standby lift door 17 can block the cutting fluid and metal chips splashed during processing in the working area, allowing the operator to easily replace the blank. The second standby sliding door 15 is opened, and the operator replaces the blank. After the replacement, the second standby sliding door 15 is closed and the second standby lift door 17 is raised to open the space between the second workbench 7 and the working area. This not only clears the way for the second workbench 7 to move from the non-working area to the working area, but also isolates the inside of the machine from the outside, preventing the cutting fluid and metal chips from splashing out of the working area during processing.

[0096] Example 3

[0097] like Figure 6 As shown, in this embodiment, the leftmost portion of the travel of the first workbench 9 is a non-working area, the rightmost portion of the travel of the second workbench 7 is a non-working area, and the first isolation and protection mechanism 12 is arranged in the non-working area of ​​the first workbench 9.

[0098] Preferably, in this embodiment, the first isolation and protection mechanism 12 and the second isolation and protection mechanism 13 are arranged as an arc door structure, the axis of the arc door structure is set in the non-processing area of ​​the first workbench 9 and the second workbench 7, and a rotating part is provided at the upper end or lower end of the arc door structure, and a fixed guide rail 28 is provided on the shell 18 to slide in matching with the upper end or lower end of the rotating part.

[0099] Preferably, in this example, the first isolation and protection mechanism 12 includes: a first protection door 121 and a first isolation door. The first protection door 121 and the first isolation door are arranged in the shell 18. When the first isolation door rotates to between the non-working area of ​​the first workbench 9 and the working area, an isolation barrier is formed between the non-working area of ​​the first workbench 9 and the working area. Then the first protection door 121 also rotates inward, opening the space between the first workbench 9 and the outside, greatly improving the safety of the operator during the work process. Through the above-mentioned arrangement, the first protection door is conducive to better isolating the inside of the machine from the outside, so that the cutting fluid and metal chips in the working area will not splash out during the processing, and avoid the problem of a large amount of cutting fluid and metal chips sticking to the first protection door, causing cleaning troubles, thereby improving the aesthetics.

[0100] Preferably, in this example, the second isolation and protection mechanism 13 includes: a second isolation door 132 and a second protection door 131. The second isolation door 132 and the second protection door 131 are arranged in the shell. When the second isolation door 132 rotates to between the non-working area of ​​the second workbench 7 and the working area, an isolation barrier is formed between the non-working area of ​​the second workbench 7 and the working area. Then the second protection door 131 also rotates inward, opening the space between the second workbench 7 and the outside, greatly improving the safety of the operator during the work process. By separately providing the second isolation door 132 and the second protection door 131, it is beneficial to better isolate the inside of the machine from the outside, so that the cutting fluid and metal chips in the working area will not splash out during the processing. At the same time, it also avoids the problem of a large amount of cutting fluid and metal chips sticking to the second protection door, causing cleaning troubles, thereby improving the aesthetics.

[0101] Preferably, in this embodiment, the first isolation and protection mechanism 12 or the second isolation and protection mechanism 13 is driven to be opened or closed by a driving mechanism. With the above arrangement, the operation is simple.

[0102] Example 4

[0103] As shown in Figure 7, in this embodiment, a double-table horizontal machining center includes:

[0104] A base 1, wherein an X-axis guide rail 3 is provided on the base 1;

[0105] The column 2 is slidably arranged on the Z-axis guide rail 114 of the base 1. The column 2 is provided with a Y-axis guide rail 25. The column 2 moves back and forth along the Z-axis guide rail 114, which is conducive to obtaining a larger Z-axis stroke, thereby ensuring that the machine tool completes normal processing actions.

[0106] A spindle mechanism, the spindle mechanism is arranged on the Y-axis guide rail 25, and the front end of the spindle mechanism clamps a machining tool;

[0107] A first driving mechanism, the first driving mechanism being mounted on one end of the base 3 and having a first workbench 9 rotatably connected thereto;

[0108] A second driving mechanism, the second driving mechanism is mounted on the other end of the base 1, and a second workbench 7 is rotatably connected to the second driving mechanism;

[0109] The front of the spindle mechanism is set as a working area; when the first drive mechanism drives the first worktable 9 to move along the X-axis to the working area, the machining tool set on the spindle mechanism processes the rough workpiece placed on the first worktable 9, and the second worktable 7 is located at one end of the X-axis guide rail 3 in a non-working area, and the second worktable 7 is in a standby state; the second drive mechanism drives the second worktable 7 to move along the X-axis to the working area, and the machining tool set on the spindle mechanism processes the rough workpiece placed on the second worktable 7, and the first worktable 9 is located at one end of the X-axis guide rail 3 in a non-working area, and the first worktable 9 is in a standby state. Through the above-mentioned setting, the dual-worktable exchange working mode can be realized without the need for exchange arms, positioning locking, and rotary exchange or shuttle exchange mechanisms, which greatly improves the reliability of worktable exchange and further reduces the failure rate. At the same time, the exchange speed can be greatly increased, further improving the processing efficiency of the machine tool.

[0110] Preferably, in this embodiment, the fourth driving mechanism includes: a fourth driving motor and a Z-axis screw rod arranged on the base 1, and the nut of the Z-axis screw rod is connected to the column 2 for driving the column 2 to move forward and backward along the Z-axis guide rail 111.

[0111] Furthermore, in some embodiments, in addition to using a driving motor to drive the screw to drive the column to move forward and backward along the Z-axis guide rail, the fourth driving mechanism can also use a linear motor to directly drive the column to move forward and backward along the Z-axis guide rail. This application does not make specific limitations on this driving method, as long as it can achieve driving forward and backward movement.

[0112] Furthermore, in this embodiment, the double-worktable horizontal machining center also includes: a shell 18, the shell 18 is fixed on the base 1, and the shell 18 is provided with a first isolation and protection mechanism 12 and a second isolation and protection mechanism 13, the first isolation and protection mechanism 12 is arranged on one side of the shell 18 for isolating and protecting the first worktable 9, and the second isolation and protection mechanism 13 is arranged on the other side of the shell 18 for isolating and protecting the second worktable 7.

[0113] Furthermore, in this embodiment, the leftmost portion of the travel of the first workbench 9 is a non-working area, the rightmost portion of the travel of the second workbench 7 is a non-working area, and the first isolation and protection mechanism 12 is arranged in the non-working area of ​​the first workbench 9 .

[0114] Furthermore, in this embodiment, the dual-worktable horizontal machining center also includes: a control center 19, which is arranged on the shell 18 and is used to control the operation of the first drive mechanism, the second drive mechanism, the third drive mechanism 21, the Z-axis drive mechanism and the spindle.

[0115] Further, if Figure 3 As shown, in this embodiment, the first driving mechanism includes: a first driving motor 24, a first X-axis screw rod 5 and a first CNC turntable 8, the first driving motor 24 is fixedly installed in the base 1 through a fixed bracket, the first CNC turntable 8 is slidably installed on the X-axis guide rail 3, the first X-axis screw rod 5 is located between the first CNC turntable 8 and the base 1, and the first driving motor 24 is connected to the first X-axis screw rod 5 to drive the first CNC turntable 8 to move left and right along the X-axis guide rail 3.

[0116] Furthermore, in this embodiment, the second driving mechanism includes: a second driving motor 23, a second X-axis screw rod 4 and a second CNC turntable 6, the second driving motor 23 is fixedly installed in the base 1 through a fixed bracket, the second CNC turntable 6 is slidably installed on the X-axis guide rail 3, the second X-axis screw rod 4 is located between the second CNC turntable 6 and the base 1, and the second driving motor 23 is connected to the second X-axis screw rod 4 for driving the second CNC turntable 6 to move left and right along the X-axis guide rail 3.

[0117] Preferably, in this embodiment, the first drive motor 24 is arranged in opposite directions to the second drive motor 23. The above arrangement is conducive to more reasonable utilization of the space inside the base, making it more neat and beautiful.

[0118] Furthermore, in this embodiment, in addition to using a drive motor to drive the lead screw to drive the CNC turntable to move left and right along the X-axis guide rail, the first drive mechanism and the second drive mechanism can also use a linear motor to directly drive the CNC turntable to move left and right along the X-axis guide rail. This application does not make specific restrictions on this driving method, and it is sufficient to be able to drive left and right movement.

[0119] Furthermore, in this embodiment, the spindle mechanism includes: the spindle 10 is installed on the Y-axis slide 113, and the third driving mechanism 21 provided on the column 2 drives the Y-axis slide 113 to move up and down on the Y-axis guide rail 25. Through the above setting, it is beneficial to better control the spindle 10 to move up and down along the column 2.

[0120] Preferably, in this embodiment, a third drive mechanism 21 is connected, and the third drive mechanism includes: a third drive motor 211 and a third drive screw 212, and the third drive screw 212 drives the Y-axis slide 113 on the Y-axis guide rail 25 to move up and down. This arrangement is conducive to better controlling the vertical feed of the spindle 10 along the Y-axis guide rail 25, thereby ensuring that the machine tool completes normal processing operations.

[0121] Furthermore, in some embodiments, in addition to using a drive motor to drive the screw to drive the CNC turntable to move up and down along the Y-axis guide rail, the third drive mechanism can also use a linear motor to directly drive the CNC turntable to move up and down along the Y-axis guide rail. This application does not make specific limitations on this driving method, as long as it can achieve the driving up and down movement.

[0122] Compared with the existing technology, this application has the following technical effects:

[0123] (1) In this application, the dual-table exchange mode can be realized without the need for exchange arms, positioning locks, and rotary exchange or shuttle exchange mechanisms, which greatly improves the reliability of the table exchange and further reduces the failure rate. At the same time, the exchange speed can be greatly increased, further improving the processing efficiency of the machine tool.

[0124] (2) In the present application, since there is no need for a positioning locking mechanism to repeatedly lock, release, and re-lock the workbench, slight changes in the accuracy of the machining center are avoided, thereby further improving the accuracy of the machining center's processing of blank workpieces, and also significantly improving the reliability of the workbench exchange.

[0125] (3) In the present application, when the first isolation protection mechanism and the second isolation protection mechanism provided on the shell are closed, the interior of the machine tool, whether the working area or the non-working area, can be isolated from the outside, thereby isolating the cutting fluid and metal chips splashing from the rough workpiece being processed, while ensuring the safety of the operator during the work process and the cleanliness of the workplace, and playing a good protective role; when the first isolation protection mechanism and the second isolation protection mechanism are opened, they can also isolate the splashing cutting fluid and metal chips, and open the non-working area, so that the operator, manipulator or industrial robot can smoothly replace the workpiece blank.

[0126] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0127] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," "in front of," "behind," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0128] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0129] The above embodiments are intended only to illustrate the technical solutions of the present application and are not intended to limit the present application. The present application is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application and should be included within the scope of the claims of the present application.

Claims

1. A double-table horizontal machining center, characterized in that: include: A base, wherein the base is provided with an X-axis guide rail; A column, the column is arranged on the base, and the column is provided with a Y-axis guide rail; A spindle mechanism, the spindle mechanism being arranged on a Y-axis slide of the Y-axis guide rail, and a front end of the spindle mechanism clamping a machining tool; a first driving mechanism, the first driving mechanism being mounted on the base and the first working table being rotatably connected to the first driving mechanism; a second driving mechanism, the second driving mechanism being mounted on the base and rotatably connected to a second workbench; In which, the front of the spindle mechanism is set as a working area; when the first driving mechanism drives the first worktable to move along the X-axis direction to the working area, the machining tool arranged on the spindle mechanism processes the blank workpiece placed on the first worktable, and the second worktable is located in the non-working area at one end of the X-axis guide rail; when the second driving mechanism drives the second worktable to move along the X-axis direction to the working area, the machining tool arranged on the spindle mechanism processes the blank workpiece placed on the second worktable, and the first worktable is located in the non-working area at one end of the X-axis guide rail.

2. The double-table horizontal machining center according to claim 1, characterized in that: Also includes: A shell is fixed on the base, and a first isolation and protection mechanism and a second isolation and protection mechanism are provided on the shell. The first isolation and protection mechanism is arranged on one side of the shell for isolating and protecting the first workbench, and the second isolation and protection mechanism is arranged on the other side of the shell for isolating and protecting the second workbench.

3. The double-table horizontal machining center according to claim 2, characterized in that: The first isolation and protection mechanism and the second isolation and protection mechanism are both configured as arc door structures, and the axis of the arc door structure is set in the non-processing area of ​​the first workbench and the second workbench. When the first isolation and protection mechanism rotates inwardly between the non-working area of ​​the first workbench and the working area, the first isolation and protection mechanism opens the space between the first workbench and the outside, and at the same time forms an isolation barrier between the non-working area of ​​the first workbench and the working area; the second isolation and protection mechanism is set in the non-working area of ​​the second workbench. When the second isolation and protection mechanism rotates inwardly between the non-working area of ​​the second workbench and the working area, the second isolation and protection mechanism opens the space between the second workbench and the outside, and at the same time forms an isolation barrier between the non-working area of ​​the second workbench and the working area.

4. The double-table horizontal machining center according to claim 3, characterized in that: The first isolation and protection mechanism includes: a first isolation door and a first protection door. The first isolation door and the first protection door are arranged in the shell. When the first isolation door is rotated to between the non-working area of ​​the first workbench and the working area, an isolation barrier is formed between the non-working area of ​​the first workbench and the working area. Then the first protection door is opened, which opens the space between the first workbench and the outside.

5. The double-table horizontal machining center according to claim 3, characterized in that: The second isolation and protection mechanism includes: a second isolation door and a second protection door. The second isolation door and the second protection door are arranged in the shell. When the second isolation door rotates between the non-working area of ​​the second workbench and the working area, an isolation barrier is formed between the non-working area of ​​the first workbench and the working area. Then the second protection door is opened, opening the space between the first workbench and the outside.

6. The double-table horizontal machining center according to claim 3, characterized in that: A rotating part is provided at the upper end or the lower end of the arc door structure, and a fixed guide rail which rotates in matching with the rotating part is provided at the upper end or the lower end of the shell.

7. The double-table horizontal machining center according to claim 6, characterized in that: Baffles are symmetrically provided on both sides of the first isolation and protection mechanism and the second isolation and protection mechanism.

8. The double-table horizontal machining center according to claim 2, characterized in that: The first isolation and protection mechanism and the second isolation and protection mechanism both include: a standby sliding door structure and a standby lifting door structure. The standby sliding door structure is slidably installed on the outside of the shell, and the standby lifting door structure is installed inside the shell.

9. The double-table horizontal machining center according to claim 8, characterized in that: The standby sliding door structure is horizontally installed in a slide groove provided on one side of the shell, and the standby lifting door structure is vertically installed in the installation groove of the shell.

10. The double-table horizontal machining center according to claim 1, characterized in that: The first driving mechanism also includes: a first driving motor, a first X-axis screw and a first CNC turntable. The first driving motor is fixedly installed in the base, the first CNC turntable is slidably installed on the X-axis guide rail, the first X-axis screw is located between the first CNC turntable and the base, and the first driving motor is connected to the first X-axis screw to drive the first CNC turntable to move left and right along the X-axis guide rail.

11. The double-table horizontal machining center according to claim 10, characterized in that: The second driving mechanism also includes: a second driving motor, a second X-axis screw and a second CNC turntable. The second driving motor is fixedly installed in the base, the second CNC turntable is slidably installed on the X-axis guide rail, the second X-axis screw is located between the first CNC turntable and the base, and the second driving motor is connected to the second X-axis screw to drive the second CNC turntable to move left and right along the X-axis guide rail.

12. The double-table horizontal machining center according to claim 11, characterized in that: The first drive motor and the second drive motor are arranged on the same side or in opposite directions.

13. The double-table horizontal machining center according to any one of claims 1 to 12, characterized in that: The spindle mechanism includes: a spindle and a spindle box, the spindle is arranged in the spindle box, the spindle box is arranged on the Y-axis slide of the Y-axis guide rail, and the third driving mechanism arranged on the column drives the Y-axis slide to move up and down on the Y-axis guide rail.

14. The double-table horizontal machining center according to claim 13, characterized in that: A Z-axis guide rail is also provided on one side of the spindle box. The spindle box is slidably connected to the Y-axis guide rail through a guide slider provided on the Z-axis guide rail. The fourth drive mechanism provided between the spindle box and the Y-axis slide drives the spindle box to move back and forth along the Z-axis guide rail.

15. The double-table horizontal machining center according to any one of claims 1 to 12, characterized in that: A Z-axis guide rail is provided on the base, and a fourth driving mechanism is provided between the column and the base for driving the column to move forward and backward along the Z-axis guide rail.

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