Special double-sided machining center for power battery tray

Abstract

The invention relates to the technical field of machining centers, in particular to a special double-sided machining center for a power battery tray, which comprises a base, a workbench, an inner frame, a movable upright post, a Y-axis sliding saddle, a Z-axis sliding table, a main shaft unit, a tool changing mechanism and a chip removal mechanism, the inner frame comprises two rectangular frames and two cross beams, the two rectangular frames are fixedly mounted on the base, and the two cross beams are fixedly mounted on the base; the battery tray is vertically installed on the workbench through the clamp, the movable stand column, the Y-axis sliding saddle, the Z-axis sliding table, the main shaft unit and the tool changing mechanism which are independent are arranged on the two faces of the battery tray respectively, the two faces of the battery tray can be machined at the same time, the machining precision is improved, and the machining efficiency is improved. Compared with the prior art, the machining efficiency can be improved by 100%, simultaneous machining of the two faces can be completed only through one-time clamping, the machining precision and the machining efficiency are higher, the inner frame comprises the two rectangular frames and the two transverse frames, the rigidity is large, and the machining precision can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of machining centers, and in particular to a double-sided machining center dedicated to a power battery tray. Background Art

[0002] With the rapid expansion of the electric and hybrid vehicle markets, the demand for power battery trays continues to increase. As an important component of electric vehicles, the performance of power battery trays directly affects the safety, endurance and overall vehicle performance of the battery. The power battery tray can also be called a battery frame, which provides a space for accommodating batteries. As a whole, the rigidity must be strong, but the frame uses several hollow cavities to absorb energy in time in the event of a collision to protect the battery, such as Figure 1 As shown, the power battery tray includes four outer frames in the front, back, left and right parts and several partitions in the middle. In order to improve the installation accuracy, the power battery tray is generally processed after assembly. The main processing points are located at several holes on both sides of the battery tray. In the prior art, a vertical machining center is generally used. The power battery tray is laid flat on the workbench, and a vertical milling power head performs milling, drilling, tapping and other processing on the surface of the battery tray. After one side is processed, the battery tray is turned upside down and the other side is continued to be processed. This processing method is inefficient, and chip removal is difficult, which is not conducive to automated production. It also requires secondary clamping, which is easy to affect the position accuracy of the upper and lower holes. Summary of the invention

[0003] The problem to be solved by the present invention is that in the prior art, a power battery tray is processed by a vertical machining center, which has low efficiency. A double-sided machining center dedicated to a power battery tray is provided.

[0004] The present invention is implemented through the following technical solution: a double-sided machining center dedicated to a power battery tray, comprising:

[0005] Base;

[0006] A workbench; a fixture is installed on the workbench, and the fixture is used to fix the power battery tray;

[0007] Inner frame; the inner frame includes two rectangular frames and two beams, the two rectangular frames are fixedly mounted on the base, respectively located on both sides of the base, and the two beams are installed in parallel on the top of the rectangular frames,

[0008] The movable columns are provided with two groups, and the two groups of movable columns are symmetrically arranged. The bottom surface of each movable column is slidably connected to the base, and the side surface of the top of the movable column is slidably connected to the crossbeam. The base and the crossbeam are respectively provided with a first linear motor drive module and a second linear motor drive module, which are used to drive the movable column to move along the X-axis direction, that is, the length direction of the crossbeam;

[0009] Y-axis saddles, two groups of which are provided, and the Y-axis saddles are slidably provided on the side of the moving column and driven up and down by the first ball screw drive module;

[0010] A Z-axis slide, wherein the Z-axis slide is slidably disposed on the Y-axis slide saddle and is driven by a second ball screw drive module to move horizontally along the Z-axis direction;

[0011] A spindle unit, wherein the spindle unit is mounted on a Z-axis slide;

[0012] A tool changing mechanism, wherein the tool changing mechanism is provided with two groups;

[0013] Chip removal mechanism.

[0014] In this solution, the battery tray is vertically mounted on the workbench through a clamp. Independent moving columns, Y-axis slide saddles, Z-axis slides, spindle units and tool changing mechanisms are respectively provided on both sides of the battery tray. Both sides of the battery tray can be processed at the same time, which can improve the processing efficiency by 100%. Moreover, only one clamping is required to complete the processing of both sides, and the processing accuracy is higher. The inner frame includes two rectangular frames and two beams, which have high rigidity and can improve the processing accuracy. The upper and lower ends of the moving column are driven and moved by the first linear motor drive module and the second linear motor drive module respectively, which have strong driving force and fast feed speed, thereby improving the processing efficiency.

[0015] Furthermore, the second ball screw drive module includes a Z-axis drive motor, a Z-axis ball screw, a Z-axis screw nut, a driving wheel, a driven wheel, and a synchronous belt. The Z-axis ball screw is rotatably mounted on the Y-axis saddle, the Z-axis screw nut is mounted on the Z-axis slide, the Z-axis screw nut is meshed with the Z-axis ball screw, one end of the Z-axis ball screw is mounted with a driven wheel, the Z-axis drive motor is mounted on the Y-axis saddle, and a driving wheel is mounted on the output shaft of the Z-axis drive motor on the back of the Z-axis slide, and the driving wheel and the driven wheel are connected by a synchronous belt. In this solution, the synchronous belt connection is used, which reduces the installation length compared with the Z-axis drive motor directly connected to the Z-axis ball screw, and the driving wheel and the driven wheel can be selected with different diameters to achieve a deceleration effect without the need to install an additional reducer.

[0016] Furthermore, the diameter ratio of the driving wheel to the driven wheel is 1:1 to 1:3. This solution can achieve a transmission ratio of 0.33 to 1 times, achieving a deceleration effect without the need to install an additional reducer.

[0017] Furthermore, the spindle unit includes a spindle frame, a spindle motor, a spindle, and a spindle sleeve. The spindle frame is fixedly mounted on the Z-axis slide, and the spindle sleeve is fixedly mounted at the front end of the spindle frame to improve the rigidity of the spindle. A spindle is rotatably arranged in the spindle sleeve, and a spindle motor is fixedly mounted in the spindle frame. The spindle motor and the spindle are connected by transmission. This solution has a compact structure, and the spindle is supported by the spindle sleeve and has greater rigidity.

[0018] Furthermore, a cover is provided outside the Y-axis saddle, a circular hole is provided at the front end of the cover, the cross-section of the spindle sleeve is circular, the spindle sleeve extends from the circular hole, and is slidably connected through a seal. The cross-section of the spindle sleeve in this scheme is circular, and cutting waste chips will automatically slide down when they fall on the spindle sleeve without causing chip accumulation, making the overall machining center more tidy and beautiful. When the Z-axis feeds back and forth, the cover can prevent waste chips from entering the interior of the spindle unit, thereby achieving a protective effect.

[0019] Furthermore, the chip removal mechanism is arranged at the base, including four parallel groups of spiral chip conveyors, which are arranged on the base in the form of spiral chip conveyor-first linear motor drive module-spiral chip conveyor-worktable-spiral chip conveyor-first linear motor drive module-spiral chip conveyor. The remaining positions on the base are provided with slopes, and chip boxes are provided at the exits of the four groups of spiral chip conveyors. This scheme adopts the idea of ​​straight-fall chip removal. The first linear motor drive module is provided with armor protection. Except for the workbench, other positions are slopes and spiral chip conveyors. During processing, all processing waste chips can fall into the four groups of spiral chip conveyors, and are transported in the same direction by the rotating auger, and finally fall into the chip box. The coolant is filtered and recovered, and the waste chips in the chip box are regularly processed to ensure that the processing area of ​​the machining center is always kept clean.

[0020] Furthermore, two groups of mobile columns, Y-axis saddles, Z-axis slides, and spindle units are symmetrically arranged, and the two groups of Y-axis saddles are symmetrically arranged on the mobile columns. If they are arranged asymmetrically, the length of the equipment in the X-axis direction requires at least one X-axis processing stroke plus the width of two mobile columns. In this solution, the two groups of Y-axis saddles are symmetrically arranged on the mobile columns, and the length of the equipment in the X-axis direction requires at least one X-axis processing stroke plus the width of a mobile column, which can reduce the space occupied by the machining center in the X-axis direction.

[0021] Furthermore, the main part of the rectangular frame, beams and movable columns is a hollow structure, which is welded from plates and is supported by ribs inside. The plates used for welding are provided with weight-reducing holes. The lightweight design can reduce costs and reduce the inertia of moving parts. Under the same power, the feed speed can be faster, thereby improving processing efficiency.

[0022] The beneficial effects of the present invention are:

[0023] 1. In the present invention, the battery tray is vertically mounted on the workbench by a clamp, and independent movable columns, Y-axis slide saddles, Z-axis slides, spindle units and tool changing mechanisms are respectively provided on both sides of the battery tray, so that both sides of the battery tray can be processed at the same time, which can improve the processing efficiency by 100%, and only one clamping is required to complete the processing of both sides, with higher processing accuracy.

[0024] 2. The inner frame of the present invention includes two rectangular frames and two crossbars, which have high rigidity, can improve processing accuracy, and provide a guarantee for achieving high mobility and large cutting force.

[0025] 3. The upper end and the lower end of the movable column are driven and moved by the first linear motor drive module and the second linear motor drive module respectively, with strong driving force and fast feed speed, thus improving processing efficiency.

[0026] 4. The second ball screw drive module of the present invention adopts a synchronous belt for transmission, which reduces the installation length and does not require an additional reducer, thus saving costs and reducing the overall weight.

[0027] 5. The cross section of the spindle sleeve of the present invention is circular. The spindle sleeve extends from the circular hole of the cover shell and is slidably connected through a seal. Cutting waste chips will automatically slide down when they fall on the spindle sleeve without causing chip accumulation, making the machining center more tidy and beautiful as a whole.

[0028] 6. The present invention adopts direct-fall chip removal. The first linear motor drive module is provided with armor protection. Except for the workbench, other positions are slopes and spiral chip conveyors. During processing, all processing waste chips can fall into four groups of spiral chip conveyors, and are transported in the same direction by the rotating auger, and finally fall into the chip removal box. The coolant is filtered and recovered, and the waste chips in the chip removal box are regularly processed to ensure that the processing area of ​​the machining center is always kept clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a power battery tray;

[0030] Figure 2 This is a front 3D view of a double-sided machining center for power battery trays;

[0031] Figure 3 This is the left view of a double-sided machining center for power battery trays;

[0032] Figure 4 This is a partial enlarged view of the main shaft unit;

[0033] Figure 5 This is a 3D rear view of a double-sided machining center specifically designed for power battery trays.

[0034] In the figure:

[0035] 1 base;

[0036] 2 workbench;

[0037] 3 inner frame; 301 rectangular frame; 302 crossbeam;

[0038] 4. Move the column;

[0039] 5Y-axis saddle;

[0040] 6Z-axis slide;

[0041] 7 spindle unit; 701 spindle frame; 702 spindle; 703 spindle sleeve;

[0042] 8 chip removal mechanism; 801 spiral chip removal machine; 802 chip removal box;

[0043] 9 first linear motor drive module;

[0044] 10 second linear motor drive module;

[0045] 11 first ball screw drive module;

[0046] 12 second ball screw drive module; 1201 Z axis drive motor; 1202 Z axis ball screw; 1203 driving wheel; 1204 driven wheel; 1205 synchronous belt;

[0047] 13 housing. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figure 2-5 As shown, a double-sided machining center dedicated to a power battery tray includes:

[0050] Base 1;

[0051] A workbench 2; a fixture is installed on the workbench 2, and the fixture is used to fix the power battery tray;

[0052] Inner frame 3; the inner frame 3 includes two rectangular frames 301 and two beams 302, the two rectangular frames 301 are fixedly mounted on the base 1, respectively located on both sides of the base 1, and the two beams 302 are installed in parallel on the top of the rectangular frames 301,

[0053] Move the column 4, such as Figure 2 and Figure 3 As shown, the movable columns 4 are provided with two groups, and the two groups of movable columns 4 are symmetrically arranged. The bottom surface of each movable column 4 is slidably connected to the base 1, and the side surface of the top of the movable column 4 is slidably connected to the crossbeam 302. The base 1 and the crossbeam 302 are respectively provided with a first linear motor drive module 9 and a second linear motor drive module 10, which are used to drive the movable column 4 to move along the X-axis direction, that is, the length direction of the crossbeam 302;

[0054] Y-axis saddle 5, wherein two groups of Y-axis saddle 5 are provided, wherein the Y-axis saddle 5 is slidably provided on the side of the movable column 4, and is driven to rise and fall by the first ball screw drive module 11;

[0055] A Z-axis slide 6, wherein the Z-axis slide 6 is slidably disposed on the Y-axis slide saddle 5 and is driven by a second ball screw drive module 12 to move horizontally along the Z-axis direction;

[0056] A spindle unit 7, wherein the spindle unit 7 is mounted on a Z-axis slide 6;

[0057] A tool changing mechanism, wherein the tool changing mechanism is provided with two groups;

[0058] Chip removal mechanism 8.

[0059] In this solution, the battery tray is vertically mounted on the workbench 2 by means of a clamp. Independent movable columns 4, Y-axis slide 5, Z-axis slide 6, spindle unit 7 and tool changing mechanism are respectively provided on both sides of the battery tray. Both sides of the battery tray can be processed at the same time, which can improve the processing efficiency by 100%. Moreover, only one clamping is required to complete the processing of both sides, and the processing accuracy is higher. The inner frame 3 includes two rectangular frames 301 and two beams 302, which have high rigidity and can improve the processing accuracy. The upper and lower ends of the movable column 4 are driven and moved by the first linear motor drive module 9 and the second linear motor drive module 10 respectively, which have high driving force and fast feed speed, thereby improving the processing efficiency.

[0060] In practical applications, such as Figure 4As shown, the second ball screw drive module 12 includes a Z-axis drive motor 1201, a Z-axis ball screw 1202, a Z-axis screw nut, a driving wheel 1203, a driven wheel 1204, and a synchronous belt 1205. The Z-axis ball screw 1202 is rotatably mounted on the Y-axis saddle 5, the Z-axis screw nut is mounted on the Z-axis slide 6, the Z-axis screw nut and the Z-axis ball screw 1202 are meshed, one end of the Z-axis ball screw 1202 is mounted with a driven wheel 1204, the Z-axis drive motor 1201 is mounted on the back side of the Y-axis saddle 5 opposite to the Z-axis slide 6, the driving wheel 1203 is mounted on the output shaft of the Z-axis drive motor 1201, and the driving wheel 1203 and the driven wheel 1204 are connected by a synchronous belt 1205. In this solution, the Z-axis drive motor 1201 and the Z-axis slide 6 are respectively located on the two sides of the Y-axis slide saddle 5, which can balance part of the weight, and are connected by a synchronous belt 1205. Compared with the Z-axis drive motor 1201 directly connected to the Z-axis ball screw, the installation length is reduced, and the driving wheel 1203 and the driven wheel 1204 can be selected with different diameters to achieve a deceleration effect. There is no need to install an additional reducer, which saves costs and reduces the overall weight.

[0061] In practical applications, such as Figure 4 As shown, the diameter ratio of the driving wheel 1203 and the driven wheel 1204 is 1:1 to 1:3. This solution can achieve a transmission ratio of 0.33 to 1 times, achieving a deceleration effect without the need to install an additional reducer.

[0062] In practical applications, such as Figure 4 As shown, the spindle unit 7 includes a spindle frame 701, a spindle motor, a spindle 702, and a spindle sleeve 703. The spindle frame 701 is fixedly mounted on the Z-axis slide 6. The spindle sleeve 703 is fixedly mounted at the front end of the spindle frame 701 to improve the rigidity of the spindle 702. The spindle 702 is rotatably arranged in the spindle sleeve 703. The spindle motor is fixedly mounted in the spindle frame 701. The spindle motor and the spindle 702 are connected by transmission. This solution has a compact structure, and the spindle 702 is supported by the spindle sleeve 703, and has greater rigidity.

[0063] In practical applications, such as Figure 4 As shown, the Y-axis saddle 5 is provided with a cover 13 outside, and a circular hole is provided at the front end of the cover 13. Figure 4 The figure shows that part of the cover 13 has been removed. The cross-section of the spindle sleeve 703 is circular. The spindle sleeve 703 extends from the circular hole and is slidably connected through a seal. The cross-section of the spindle sleeve 703 in this solution is circular. Cutting waste chips will automatically slide down when they fall on the spindle sleeve 703, and will not cause chip accumulation, making the overall machining center more tidy and beautiful. When the Z axis is fed back and forth, the cover 13 can prevent waste chips from entering the interior of the spindle unit 7, thereby achieving a protective effect.

[0064] In practical applications, such as Figure 5 As shown, the chip removal mechanism 8 is arranged at the base 1, including four parallel groups of spiral chip conveyors 801, and the base 1 is arranged in the form of spiral chip conveyor 801-first linear motor drive module 9-spiral chip conveyor 801-worktable 2-spiral chip conveyor 801-first linear motor drive module 9-spiral chip conveyor 801. The remaining positions on the base 1 are provided with slopes, and chip boxes 802 are provided at the exits of the four groups of spiral chip conveyors 801. This scheme adopts the idea of ​​straight-fall chip removal. The first linear motor drive module 9 is provided with armor protection. Except for the worktable 2, other positions are all slopes and spiral chip conveyors 801. During processing, all processing waste chips can fall into the four groups of spiral chip conveyors 801, and are transported in the same direction by the rotating auger, and finally fall into the chip box 802. The coolant is filtered and recovered, and the waste chips in the chip box 802 are regularly processed to ensure that the processing area of ​​the machining center is always kept clean.

[0065] In actual applications, two sets of mobile columns 4, Y-axis saddles 5, Z-axis slides 6, and spindle units 7 are symmetrically arranged. The two sets of Y-axis saddles 5 are located on the same side of the mobile column 4. If they are located on different sides, the X-axis length of the equipment requires at least one X-axis processing stroke plus the width of two mobile columns 4. In this solution, the two sets of Y-axis saddles 5 are located on the same side of the mobile column 4, so the X-axis length of the equipment requires at least one X-axis processing stroke plus the width of a mobile column 4, which can reduce the space occupied by the machining center in the X-axis direction.

[0066] In actual applications, the main parts of the rectangular frame 301, the crossbeam 302, and the movable column 4 are hollow structures, which are welded from plates, and are supported by ribs inside. The plates used for welding are provided with weight-reducing holes. The lightweight design can reduce costs and reduce the inertia of moving parts. Under the same power, the feed speed can be faster, thereby improving processing efficiency.

[0067] In summary, the double-sided machining center dedicated to a power battery tray described in the present invention can complete the machining of both sides of the power battery tray with one clamping, and has the advantages of high machining efficiency and high machining precision.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above implementation is only to illustrate the technical concept and features of the present invention, and its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sided machining center for power battery trays, characterized by: include: Base (1); A workbench (2); a clamp is installed on the workbench (2), and the clamp is used to fix the power battery tray; The inner frame (3) comprises two rectangular frames (301) and two cross beams (302), wherein the two rectangular frames (301) are fixedly mounted on the base (1) and are respectively located on both sides of the base (1), and the two cross beams (302) are mounted in parallel on the top of the rectangular frames (301). A movable column (4), wherein the movable column (4) is provided with two groups, the two groups of movable columns (4) are symmetrically arranged, the bottom surface of each movable column (4) is slidably connected to the base (1), and the side surface of the top of the movable column (4) is slidably connected to the crossbeam (302), and the base (1) and the crossbeam (302) are respectively provided with a first linear motor drive module (9) and a second linear motor drive module (10), which are used to drive the movable column (4) to move along the X-axis direction, that is, the length direction of the crossbeam (302); Y-axis sliding saddle (5), wherein two groups of the Y-axis sliding saddle (5) are provided, and the Y-axis sliding saddle (5) is slidably provided on the side of the movable column (4), and is driven to rise and fall by a first ball screw driving module (11); A Z-axis slide table (6), wherein the Z-axis slide table (6) is slidably arranged on the Y-axis slide saddle (5) and is driven by a second ball screw drive module (12) to move horizontally along the Z-axis direction; A spindle unit (7), wherein the spindle unit (7) is mounted on the Z-axis slide table (6); A tool changing mechanism, wherein the tool changing mechanism is provided with two groups; Chip removal mechanism (8).

2. A double-sided machining center for power battery trays according to claim 1, characterized in that: The second ball screw drive module (12) comprises a Z-axis drive motor (1201), a Z-axis ball screw (1202), a Z-axis screw nut, a driving wheel (1203), a driven wheel (1204), and a synchronous belt (1205); the Z-axis ball screw (1202) is rotatably mounted on a Y-axis slide saddle (5); the Z-axis screw nut is mounted on a Z-axis slide table (6); the Z-axis screw nut and the Z-axis ball screw (1201) are ... and the Z-axis ball screw (1201) are rotatably mounted on a Y-axis slide saddle (5); the Z 202) are engaged, a driven wheel (1204) is installed at one end of the Z-axis ball screw (1202), the Z-axis drive motor (1201) is installed on the back side opposite to the Z-axis slide table (6) on the Y-axis slide saddle (5), a driving wheel (1203) is installed on the output shaft of the Z-axis drive motor (1201), and the driving wheel (1203) and the driven wheel (1204) are connected by a synchronous belt (1205).

3. A double-sided machining center for power battery trays according to claim 2, characterized in that: The diameter ratio of the driving wheel (1203) to the driven wheel (1204) is 1:1 to 1:

3.

4. A double-sided machining center for power battery trays according to claim 1, characterized in that: The spindle unit (7) comprises a spindle frame (701), a spindle motor, a spindle (702), and a spindle sleeve (703); the spindle frame (701) is fixedly mounted on a Z-axis slide (6); the spindle sleeve (703) is fixedly mounted at the front end of the spindle frame (701) for improving the rigidity of the spindle (702); the spindle (702) is rotatably arranged in the spindle sleeve (703); the spindle motor is fixedly mounted in the spindle frame (701); and the spindle motor and the spindle (702) are transmission-connected.

5. A double-sided machining center for power battery trays according to claim 4, characterized in that: The Y-axis saddle (5) is provided with a cover shell (13) outside, and a circular hole is provided at the front end of the cover shell (13). The cross section of the spindle sleeve (703) is circular, and the spindle sleeve (703) extends out of the circular hole and is slidably connected through a seal.

6. A double-sided machining center for power battery trays according to claim 1, characterized in that: The chip removal mechanism (8) is arranged on the base (1), and comprises four parallel groups of spiral chip conveyors (801). The base (1) is arranged in the form of spiral chip conveyor (801) - first linear motor drive module (9) - spiral chip conveyor (801) - workbench (2) - spiral chip conveyor (801) - first linear motor drive module (9) - spiral chip conveyor (801). The remaining positions on the base (1) are all provided with slopes. A chip removal box (802) is provided at the exits of the four groups of spiral chip conveyors (801).

7. The double-sided machining center for power battery tray according to claim 1, characterized in that: The two groups of movable columns (4), the Y-axis slide saddle (5), the Z-axis slide table (6), and the spindle unit (7) are symmetrically arranged, and the two groups of Y-axis slide saddles (5) are located on the same side of the movable column (4).

8. The double-sided machining center for power battery tray according to claim 1, characterized in that: The main parts of the rectangular frame (301), the crossbeam (302) and the movable column (4) are hollow structures, which are welded from plates, and are supported by rib plates inside. The plates used for welding are provided with weight-reducing holes.

Images