Electromobile label base plate machining grinding machine

Abstract

The invention belongs to the field of machining, and particularly relates to a battery car label base plate machining grinding machine which comprises a machine body, a grinding wheel, a first driving mechanism, an X-axis walking mechanism, a Y-axis walking mechanism, a Z-axis walking mechanism and a sliding table, the sliding table comprises a bearing plate and a bearing table, and at least four composite vibration drivers are installed on the edge area of the lower portion of the bearing plate; when the grinding wheel grinds the battery car label base plate fixed to the bearing table, the composite vibration driver applies multi-frequency-band mechanical vibration to the bearing plate. According to the electromobile label base plate machining device, the electromobile label base plate can be automatically subjected to grinding, chamfering, grinding, polishing, grinding, coarsening and other operations in the machining process, the composite vibration driver is additionally arranged on the lower edge area of the bearing plate, the grinding efficiency, the chip removal effect, the grinding mark removal effect, the coarsening effect, the polishing effect and the like can be remarkably improved, and the implementation effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a grinding machine for processing a battery vehicle sign substrate. Background Art

[0002] In the field of battery vehicle nameplate and sign production and processing, the substrates of the signs are usually metal and non-metal: metals include zinc alloy, copper, iron, aluminum, stainless steel, etc. In the production process of sign substrates, the substrates need to be polished, such as deburring, mirror polishing, and roughening of individual areas.

[0003] However, the existing grinding machines usually use two-axis or three-axis walking mechanisms to control the grinding wheel. A common problem is that after the adjustment on the Z axis (vertical direction) is completed, the initial spacing between the grinding wheel and the substrate of the sign is fixed. As the grinding progresses, the actual spacing between the grinding wheel and the substrate of the sign is constantly increasing. There is no mechanism in the prior art that can dynamically adjust this tiny spacing (micrometer level) in real time (even if a cylinder or hydraulic cylinder is used for lifting, it is necessary to contact and lock it first, and then adjust it; as for the use of a lifting screw, it is even worse, and its adjustment accuracy is lower). This will bring the following defects:

[0004] 1. After each period of grinding, it is necessary to stop grinding and then readjust the initial distance between the grinding wheel and the substrate of the sign so that the grinding wheel is close to the substrate of the sign. The adjustment frequency is high, which limits the improvement of grinding efficiency.

[0005] 2. Since there is no other external force between the grinding wheel and the base plate of the sign, and only relying on the rotation force of the grinding wheel, the chip removal effect between the grinding wheel and the base plate of the sign is limited.

[0006] 3. Since the actual distance between the grinding wheel and the base plate of the sign cannot be changed dynamically, obvious grinding marks are likely to appear at the junction of adjacent grinding belts (strip grinding areas) during the initial grinding. To eliminate such grinding marks, multiple covering grindings at different angles are required, which greatly affects the grinding efficiency.

[0007] Based on this, the present invention is proposed. Summary of the invention

[0008] The object of the present invention is to provide a grinding machine for processing a battery vehicle sign substrate to solve the above-mentioned problem.

[0009] A battery vehicle sign substrate processing grinding machine, comprising a bed, a grinding wheel, a first driving mechanism for driving the grinding wheel to rotate, an X-axis walking mechanism, a Y-axis walking mechanism, a Z-axis walking mechanism, and a slide, wherein the slide comprises a bearing plate and a bearing platform located on the bearing plate, wherein the Y-axis walking mechanism drives the grinding wheel to perform translational reciprocating motion along the width direction of the bed, the Z-axis walking mechanism drives the grinding wheel to perform lifting motion, and the X-axis walking mechanism drives the bearing plate to perform translational reciprocating motion along the length direction of the bed, and at least four composite vibration drivers are installed at the lower edge area of ​​the bearing plate;

[0010] When the grinding wheel grinds the battery vehicle sign substrate fixed on the bearing platform, the composite vibration driver applies multi-frequency mechanical vibration to the bearing plate.

[0011] As a further improvement, the Y-axis walking mechanism includes a first slide rail arranged parallel to the width direction of the bed, a first slide seat slidably connected to the first slide rail, and a second driving mechanism for driving the first slide seat to perform translational reciprocating motion.

[0012] As a further improvement, the second driving mechanism is one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder.

[0013] As a further improvement, the first driving mechanism includes a belt transmission mechanism and a first motor, and the first motor drives the grinding wheel to rotate through the belt transmission mechanism.

[0014] As a further improvement, the X-axis walking mechanism includes a first guide rail arranged along the length direction of the bed, a rotating platform slidably connected to the first guide rail, and a third driving mechanism for driving the rotating platform to perform translational reciprocating motion. The top of the rotating platform is fixedly connected to the center of the lower part of the supporting plate.

[0015] As a further improvement, the third driving mechanism is one of a pneumatic cylinder, a hydraulic cylinder, and an electric screw.

[0016] A further improvement is that the composite vibration driver includes a metal circular groove, two ultrasonic transducers located inside the metal circular groove, a megasonic transducer located inside the metal circular groove, and a regular polyhedron-shaped free metal ball, the outer walls of the ultrasonic transducers are welded and fixed to the inner wall of the metal circular groove, the outer wall of the megasonic transducer is welded and fixed to the inner wall of the metal circular groove, and the free metal ball is confined to the area between the two ultrasonic transducers and the megasonic transducer; the metal circular groove is also filled with a non-Newtonian fluid that covers the outer periphery of the ultrasonic transducer, the outer periphery of the megasonic transducer and the outer wall of the free metal ball.

[0017] As a further improvement, the free metal ball is in the shape of a regular tetrahedron, a regular hexahedron, a regular octahedron, a regular dodecahedron or a regular icosahedron.

[0018] As a further improvement, in a single composite vibration driver, the ultrasonic frequency of the first ultrasonic transducer is 20 kHz, the second ultrasonic transducer is not activated, and the megasonic frequency of the megasonic transducer is 3.1 MHz.

[0019] As a further improvement, in a single composite vibration driver, the ultrasonic frequency of the first ultrasonic transducer is 56 kHz, the ultrasonic frequency of the second ultrasonic transducer is 83 kHz, and the megasonic transducer is not activated.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The battery vehicle sign substrate processing grinder can automatically perform grinding, chamfering, grinding, polishing, grinding, roughening and other operations on the battery vehicle sign substrate during the processing process, with a high degree of automation. By adding a composite vibration driver to the lower edge area of ​​the supporting plate, it can significantly improve the grinding efficiency, chip removal effect, eliminate grinding marks, roughening effect, polishing effect, etc., and has a good implementation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a grinding machine for processing a battery vehicle sign substrate according to the present invention;

[0023] Figure 2 It is a schematic diagram of the distribution of the bearing plate and the composite vibration driver of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the composite vibration driver of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0026] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1 As shown, the battery vehicle sign substrate processing grinding machine includes a bed 40, a grinding wheel 31, a first driving mechanism for driving the grinding wheel 31 to rotate, an X-axis walking mechanism, a Y-axis walking mechanism, a Z-axis walking mechanism, and a slide. The slide includes a bearing plate 60 and a bearing platform 61 located on the bearing plate 60. The Y-axis walking mechanism drives the grinding wheel 31 to perform translational reciprocating motion along the width direction of the bed 40, the Z-axis walking mechanism drives the grinding wheel 31 to perform lifting motion, and the X-axis walking mechanism drives the bearing plate 60 to perform translational reciprocating motion along the length direction of the bed 40. At least four compound vibration drivers 70 are installed in the lower edge area of ​​the bearing plate 60.

[0030] When the grinding wheel 31 grinds the battery vehicle sign substrate fixed on the supporting platform 61 , the composite vibration driver 70 applies multi-frequency mechanical vibration to the supporting platform 60 .

[0031] The battery vehicle sign substrate processing grinder can perform operations such as grinding, chamfering, and grinding on the battery vehicle sign substrate, and can also grind the steps of the outer contour of the circular substrate, and can also grind different tools, just by installing different types of fixtures on the carrier 61.

[0032] The multi-band here refers to two kHz-level vibration sources or one kHz-level vibration source and one MHz-level vibration source. Through the multi-band mechanical vibration, on the one hand, the distance between the grinding wheel 31 and the battery vehicle sign substrate can be dynamically adjusted, which will reduce the frequency of adjusting the distance between the grinding wheel 31 and the battery vehicle sign substrate. For example, the distance between the grinding wheel 31 and the battery vehicle sign substrate is only adjusted when it reaches 0.5mm or 1mm, because the composite vibration driver 70 applies multi-band mechanical vibration to the edge area of ​​the carrier plate 60, and the multi-band mechanical vibration is also transmitted to the battery vehicle sign substrate, thereby ensuring that even if there is a certain distance between the battery vehicle sign substrate and the grinding wheel 31 (such as the maximum distance between the battery vehicle sign substrate and the grinding wheel 31 when it is stationary is 0.5mm), there is still some grinding effect.

[0033] As grinding progresses, the chip removal effect can be significantly improved under the action of multi-frequency mechanical vibration.

[0034] By adopting the composite vibration driver 70 and the mechanical vibration assistance of a special frequency band, the grinding marks between adjacent grinding belts can be effectively eliminated during the second to third grinding passes, thereby significantly improving the grinding efficiency.

[0035] Example 2

[0036] In Example 1, the Y-axis walking mechanism includes a first slide rail 22 arranged parallel to the width direction of the bed 40, a first slide seat 21 slidably connected to the first slide rail 22, and a second driving mechanism for driving the first slide seat 21 to perform translational reciprocating motion. The second driving mechanism is one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder, preferably an electric cylinder.

[0037] The first driving mechanism includes a belt transmission mechanism 32 and a first motor 33 . The first motor 33 drives the grinding wheel 31 to rotate through the belt transmission mechanism 32 .

[0038] The X-axis walking mechanism includes a first guide rail 52 arranged along the length direction of the bed 40, a rotating platform 51 slidably connected to the first guide rail 52, and a third driving mechanism for driving the rotating platform 51 to perform translational reciprocating motion, and the top of the rotating platform 51 is fixedly connected to the center of the lower part of the bearing plate 60. The third driving mechanism is one of a cylinder, a hydraulic cylinder, and an electric screw, preferably an electric screw.

[0039] The top of the rotating platform 51 can rotate, so it can drive the carrier plate 60 to rotate. The rotating platform 51 preferably has a brake function, and after the position of the carrier plate 60 is determined, the top of the rotating platform 51 can no longer rotate.

[0040] The support platform 61 and the support plate 60 are detachably mounted and connected via bolt fasteners.

[0041] The support platform 61 can be used to match and install the battery vehicle sign substrate. For example, a slot that matches the battery vehicle sign substrate is provided in the center of the support platform 61 .

[0042] Example 3

[0043] In Example 1, Figure 2 , 3As shown, in this example, six composite vibration drivers 70 are provided. The composite vibration driver 70 includes a metal circular groove 71, two ultrasonic transducers 72 located inside the metal circular groove 71, a megasonic transducer 75 located inside the metal circular groove 71, and a regular polyhedron-shaped free metal ball 73. The outer side walls of the ultrasonic transducers 72 are welded and fixed to the inner side walls of the metal circular groove 71, and the outer side walls of the megasonic transducers 75 are welded and fixed to the inner side walls of the metal circular groove 71. The free metal ball 73 is confined to the area between the two ultrasonic transducers 72 and the megasonic transducers 75; the metal circular groove 71 is also filled with a non-Newtonian fluid that covers the outer periphery of the ultrasonic transducer 72, the outer periphery of the megasonic transducer 75, and the outer wall of the free metal ball 73. Among them, the notch of the metal circular groove 71 is sealed and connected to the carrier plate 60. The non-Newtonian fluid is made by mixing starch and water in a mass ratio of 2:1.

[0044] The free metal ball 73 is in the shape of a regular dodecahedron.

[0045] When the battery car sign substrate (308cm 2 ) When mirror polishing is performed, if the six composite vibration drivers 70 are not started, a total polishing time of 37 minutes is required to make the surface roughness Ra of the battery vehicle sign substrate ≤ 0.09 μm; subsequently, the grinding wheel 31 is replaced with a polishing wheel for mirror polishing, and the surface roughness Ra can be controlled within 0.022-0.029 μm.

[0046] When the battery car sign substrate (308cm 2 ) When mirror polishing is performed, six compound vibration drivers 70 are started; in a single compound vibration driver 70, the ultrasonic frequency f1 of the first ultrasonic transducer 72 is 20 kHz, the second ultrasonic transducer 72 is not started (f2=0), and the megasonic frequency f3 of the megasonic transducer 75 is 3.1 MHz.

[0047] When conducting grinding tests, the effects of different frequencies on grinding results are shown in Table 1:

[0048] Table 1

[0049]

[0050] It can be seen that during the mirror polishing process, only one ultrasonic transducer 72 can be used in conjunction with one megasonic transducer 75 at a specific frequency to achieve fast polishing and good polishing effect. If both ultrasonic transducers 72 are activated, fine polishing may not be possible due to the violent impact between them, and the surface roughness cannot be reduced after it drops to a certain level.

[0051] For the battery vehicle sign substrate to be compounded with the plastic layer, the battery vehicle sign substrate is usually made of cold-rolled steel plate, and its surface roughness is generally Ra3.2±0.2μm; and the general roughening requires the surface roughness to reach Ra6.3~12.5μm. For this type of battery vehicle sign substrate, when the roughening operation is performed, in a single composite vibration driver 70, the ultrasonic frequency f1 of the first ultrasonic transducer 72 is 56kHz, the ultrasonic frequency f2 of the second ultrasonic transducer 72 is 83kHz, and the megasonic transducer 75 is not started (the megasonic frequency f3 of the megasonic transducer 75 is 0).

[0052] When conducting the roughening test, the influence of different frequencies on the roughening effect is shown in Table 2:

[0053] Table 2

[0054]

[0055]

[0056] It can be seen that when performing the roughening operation, it is still necessary to rely on two ultrasonic transducers 72 at a specific frequency, and the megasonic transducer 75 is not very helpful for roughening. The frequencies of the two ultrasonic transducers 72 cannot be equal, otherwise the roughening will be too intense, resulting in the surface roughness not reaching the appropriate range; if the difference in frequency between the two ultrasonic transducers 72 is too large, the roughening efficiency will be affected; if the difference in frequency between the two ultrasonic transducers 72 is too small, the roughening will also be too intense, and the final surface roughness will not reach the appropriate range. The frequency difference between the two ultrasonic transducers 72 is preferably 26 to 30 kHz.

[0057] During the polishing operation, the grinding wheel 31 is replaced with a polishing wheel. At this time, both ultrasonic transducers 72 are not started. The megasonic frequency of the megasonic transducer 75 is 1.3 MHz. The battery vehicle sign substrate with a surface roughness Ra≤0.09 μm is polished. After polishing for 15 to 17 minutes, the surface roughness Ra can be controlled at 0.022 to 0.029 μm.

[0058] During the polishing operation, the vibration frequency of the free metal ball 73 driven by an external force (such as the megasonic transducer 75) is monitored to be less than 3kHz; if the free metal ball 73 is removed, during the polishing operation, it is found that water-like polishing marks are easily formed after polishing for 20 to 30 minutes.

[0059] In addition, it was found that if the free metal ball 73 is in the shape of a regular tetrahedron or a regular hexahedron, the free metal ball 73 will be greatly worn; if the free metal ball 73 is in the shape of a regular octahedron, a regular icosahedron, a sphere, or an ellipsoid, it was found that water-like polishing marks will appear.

[0060] The free metal ball 73 in the form of a regular dodecahedron generates a more orderly vibration on the supporting plate 60, and water-like polishing marks are less likely to appear.

[0061] The non-Newtonian fluid can absorb part of the vibration energy, avoiding too strong impact between the two ultrasonic transducers 72 (mainly transmitting part of the vibration through the metal circular groove 71), which may cause grinding marks to appear when the mirror is polished; for example, if the non-Newtonian fluid is replaced with water or air, grinding marks will inevitably appear when the mirror is polished.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery vehicle sign substrate processing grinding machine, comprising a bed (40), a grinding wheel (31), a first driving mechanism for driving the grinding wheel (31) to rotate, an X-axis walking mechanism, a Y-axis walking mechanism, a Z-axis walking mechanism, and a slide, wherein the slide comprises a bearing plate (60) and a bearing platform (61) located on the bearing plate (60), the Y-axis walking mechanism drives the grinding wheel (31) to perform a translational reciprocating motion along the width direction of the bed (40), and the Z-axis walking mechanism drives the grinding wheel (31) to perform a lifting motion, characterized in that: The X-axis walking mechanism drives the bearing plate (60) to perform translational reciprocating motion along the length direction of the bed body (40), and at least four composite vibration drivers (70) are installed in the lower edge area of ​​the bearing plate (60); When the grinding wheel (31) grinds the battery vehicle sign substrate fixed on the bearing platform (61), the composite vibration driver (70) applies multi-frequency mechanical vibration to the bearing plate (60).

2. The battery vehicle sign substrate processing grinding machine according to claim 1 is characterized in that: The Y-axis walking mechanism comprises a first slide rail (22) arranged in parallel along the width direction of the bed (40), a first slide seat (21) slidably connected to the first slide rail (22), and a second driving mechanism for driving the first slide seat (21) to perform translational reciprocating motion.

3. The battery vehicle sign substrate processing grinding machine according to claim 2 is characterized in that: The second driving mechanism is one of a pneumatic cylinder, a hydraulic cylinder, and an electric cylinder.

4. The battery vehicle sign substrate processing grinding machine according to claim 1 is characterized by: The first driving mechanism comprises a belt transmission mechanism (32) and a first motor (33), and the first motor (33) drives the grinding wheel (31) to rotate through the belt transmission mechanism (32).

5. The battery vehicle sign substrate processing grinding machine according to claim 1 is characterized in that: The X-axis walking mechanism comprises a first guide rail (52) arranged along the length direction of the bed (40), a rotating platform (51) slidably connected to the first guide rail (52), and a third driving mechanism for driving the rotating platform (51) to perform translational reciprocating motion, wherein the top of the rotating platform (51) is fixedly connected to the center of the lower part of the supporting plate (60).

6. The battery vehicle sign substrate processing grinding machine according to claim 5 is characterized by: The third driving mechanism is one of a pneumatic cylinder, a hydraulic cylinder, and an electric screw.

7. The battery vehicle sign substrate processing grinding machine according to claim 1 is characterized by: The composite vibration driver (70) comprises a metal circular groove (71), two ultrasonic transducers (72) located inside the metal circular groove (71), a megasonic transducer (75) located inside the metal circular groove (71), and a regular polyhedron-shaped free metal ball (73); the outer side walls of the ultrasonic transducers (72) are welded and fixed to the inner side walls of the metal circular groove (71); the outer side walls of the megasonic transducers (75) are welded and fixed to the inner side walls of the metal circular groove (71); and the free metal ball (73) is confined to a region between the two ultrasonic transducers (72) and the megasonic transducer (75); and the metal circular groove (71) is also filled with a non-Newtonian fluid that covers the outer periphery of the ultrasonic transducers (72), the outer periphery of the megasonic transducers (75), and the outer wall of the free metal ball (73).

8. The battery vehicle sign substrate processing grinding machine according to claim 7 is characterized by: The free metal ball (73) is in the shape of a regular tetrahedron, a regular hexahedron, a regular octahedron, a regular dodecahedron or a regular icosahedron.

9. The battery vehicle sign substrate processing grinding machine according to claim 7, characterized in that: In the single composite vibration driver (70), the ultrasonic frequency of the first ultrasonic transducer (72) is 20 kHz, the second ultrasonic transducer (72) is not activated, and the megasonic frequency of the megasonic transducer (75) is 3.1 MHz.

10. The battery vehicle sign substrate processing grinding machine according to claim 7, characterized in that: In the single composite vibration driver (70), the ultrasonic frequency of the first ultrasonic transducer (72) is 56 kHz, the ultrasonic frequency of the second ultrasonic transducer (72) is 83 kHz, and the megasonic transducer (75) is not activated.

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