Automatic grinding equipment for automobile welding production line

Abstract

The utility model discloses automatic grinding equipment of an automobile welding production line. The automatic grinding equipment comprises a mechanical arm, a flexible grinding device, an automatic tool changing device and a dust collection device. The flexible grinding device comprises a flexible force control assembly and a grinding material assembly, the flexible force control assembly is connected with the mechanical arm, the grinding material assembly is connected with the flexible force control assembly, and the flexible force control assembly is configured to automatically adjust the grinding force of the grinding material assembly; the automatic tool changing device is arranged on one side of the flexible grinding device and comprises a tool magazine and a tool base, and the tool base is arranged in the tool magazine and used for containing grinding materials with tool handles. The dust collection device is arranged at the end of the grinding assembly and comprises a dust collection cover and a brush, the brush is movably connected with the dust collection cover, and the brush is used for being connected with the dust collection cover to form a dust collection cavity. According to the automatic grinding equipment, automatic grinding, tool changing and dust removing can be conducted, the automation degree is high, the labor cost is saved, and the grinding reliability is also high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile manufacturing, in particular to an automatic polishing device of an automobile welding production line. BACKGROUND

[0002] In the automobile body manufacturing process, spot welding process is the core method of connecting sheet metal parts, but after welding, defects such as spatter and burr are prone to occur around the welding point. If these defects are not handled in time, it will directly affect the quality of the subsequent painting and assembly process, and even cause workpiece damage or safety hazards.

[0003] In the prior art, the automobile body is generally polished by manual operation. Manual polishing has problems such as high risk coefficient and low efficiency. In addition, manual polishing mainly relies on experienced operators, and in the polishing process, the polishing effect is inconsistent due to technical differences. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems in the background art, the automatic polishing device of the present application can automatically polish the automobile, has high polishing efficiency, and can improve the safety and consistency of vehicle polishing.

[0005] In order to solve the above technical problems, the first technical scheme adopted by the present application is to provide an automatic polishing device of an automobile welding production line, which comprises a mechanical arm, a flexible polishing device, an automatic tool changing device and a dust collection device. The flexible polishing device comprises a flexible force control assembly and an abrasive assembly, the flexible force control assembly is connected to the mechanical arm, the abrasive assembly is connected to the flexible force control assembly, and the flexible force control assembly is configured to automatically adjust the polishing force of the abrasive assembly; the automatic tool changing device is arranged on one side of the flexible polishing device, the automatic tool changing device comprises a tool magazine and a tool seat, the tool seat is arranged in the tool magazine, and the tool seat is used for placing abrasive with a tool handle; the dust collection device is arranged at the end of the abrasive assembly, and the dust collection device comprises a dust collection shell and a brush, wherein the brush is movably connected with the dust collection shell, and the brush is used to form a dust collection cavity with the dust collection shell.

[0006] In some specific embodiments, the brush has a closed state and an open state. In the closed state, the brush is surrounded by the dust collection shell to form a dust collection cavity. In the open state, the brush is located in the dust collection shell.

[0007] In some specific embodiments, the brush is slidably connected with the dust collection shell.

[0008] In some specific embodiments, the side wall of the dust collection shell is provided with a guide groove, and the outer wall of the brush is provided with a guide rail, and the guide rail is slidably connected with the guide groove.

[0009] In some specific embodiments, a push piece is arranged in the guide groove, the push piece is slidably connected with the guide groove, and the push piece is used to push the brush to move.

[0010] In some specific embodiments, the dust collection device further comprises a baffle, the baffle being arranged at the end of the dust cover and the brush, and the baffle being used to contact the vehicle body.

[0011] In some specific embodiments, the surface of the baffle contacting the vehicle body is an arc surface.

[0012] In some specific embodiments, the flexible polishing device comprises a flexible force control sensor, and the flexible force control sensor is connected to the abrasive assembly.

[0013] In some specific embodiments, the abrasive assembly comprises an electric spindle, a tool holder and an abrasive, wherein the electric spindle is connected to the flexible force control assembly, the tool holder is connected to the electric spindle, the abrasive is connected to the tool holder, and the dust collection device is arranged at the periphery of the tool holder.

[0014] In some specific embodiments, the abrasive assembly further comprises a clamp, wherein the clamp is connected to the flexible force control assembly, the clamp is formed with a receiving cavity, and the electric spindle is fixed in the receiving cavity.

[0015] Advantages: Different from the prior art, the automatic polishing device for the automobile welding production line provided by the application comprises a mechanical arm, a flexible polishing device, an automatic tool changing device and a dust collection device. The flexible polishing device comprises a flexible force control assembly and an abrasive assembly, the flexible force control assembly is connected to the mechanical arm, the abrasive assembly is connected to the flexible force control assembly, and the flexible force control assembly is configured to automatically adjust the polishing force of the abrasive assembly; the automatic tool changing device is arranged at one side of the flexible polishing device, the automatic tool changing device comprises a tool magazine and a tool seat, the tool seat is arranged in the tool magazine, and the tool seat is used to place the abrasive with the tool holder; the dust collection device is arranged at the end of the abrasive assembly, and the dust collection device comprises a dust cover and a brush, wherein the brush is movably connected to the dust cover, and the brush is used to connect to the dust cover to form a dust collection cavity. The automatic polishing device can automatically polish, change tools and remove dust, has a high degree of automation, saves labor cost, can improve the safety of polishing, and has high consistency of polishing. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic diagram of an embodiment of an automatic polishing device for an automobile welding production line provided by the application;

[0018] Figure 2 is Figure 1 a structural schematic diagram of an embodiment of a flexible polishing device shown in the figure.

[0019] Figure 3 is Figure 1 a structural schematic view of an embodiment of a dust collection device;

[0020] Figure 4 is Figure 3 a structural schematic view of another state of the dust collection device;

[0021] Figure 5 is Figure 1 a structural schematic view of an embodiment of an automatic tool changer. DETAILED DESCRIPTION

[0022] The present application will be further described by way of illustration with reference to the following drawings and embodiments. It is specifically intended that the following description be illustrative only and not limiting of the application as described and claimed. Similarly, it is specifically intended that the following description not be limiting of the overall scope of the application, which scope is to be determined by reference to the claims.

[0023] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiments even though it can not be explicitly described within the same.

[0024] In the description of the application, it is necessary to note that, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, it can be detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or connected through an intermediate medium. For those skilled in the art, the above-mentioned specific meanings can be connected according to the specific circumstances.

[0025] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0026] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0027] The present application aims to provide an automatic polishing equipment for an automobile welding production line. The present application realizes efficient, accurate and fully automatic removal of welding point burrs through a mechanical arm, a flexible polishing device, an automatic tool changing device and a dust collection device, while reducing manual intervention and comprehensive cost, improving process consistency and production rhythm. A kind of automatic polishing equipment for automobile welding production line provided by the present application will be described in detail below.

[0028] Please refer to Figure 1 As shown in the drawings, Figure 1 It is an embodiment of the structure of the automatic polishing equipment for automobile welding production line provided by the present application. The automatic polishing equipment for automobile welding production line 10 (hereinafter referred to as "automatic polishing equipment 10") comprises: a mechanical arm 11, a flexible polishing device 12, an automatic tool changing device 13 and a dust collection device 14.

[0029] The flexible polishing device 12 is connected with the mechanical arm 11. The mechanical arm 11 is used to move the flexible polishing device 12, so that the flexible polishing device 12 moves to the vehicle body to polish the vehicle. The mechanical arm 11 is also used to move the flexible polishing device 12 to the automatic tool changing device 13 for tool changing.

[0030] The mechanical arm 11 in the present application needs to ensure sufficient arm span and load. The structure of the mechanical arm 11 is within the scope of understanding of those skilled in the art, and will not be described in detail here.

[0031] When the car body needs to be polished, the car body enters the polishing station and is positioned, the roller bed descends or is fixed in place by other means, and the automatic polishing equipment 10 begins polishing.

[0032] Because the vehicle body has a complex shape, mostly curved surfaces or large curvature changes, and there are tolerances, the abrasive needs to be in constant contact with the vehicle body during grinding to ensure that the base material is not damaged and the amount of material removed needs to be controlled within an acceptable range. Therefore, in addition to ensuring the wear resistance of the abrasive, it is also necessary to maintain a constant grinding speed, constant rotation speed and constant grinding force of the flexible grinding device 12.

[0033] The flexible grinding device 12 of this application adopts closed-loop control technology. In a specific embodiment, the output force range of the flexible grinding device 12 is ±200N, the accuracy is ±1N, the extension stroke is 3~45mm, the displacement accuracy is 0.1mm, and it can adapt to the pressure requirements of different curved surfaces.

[0034] like Figure 2 As shown, Figure 2 yes Figure 1 The diagram shows a structural schematic of one embodiment of the flexible grinding device 12. The flexible grinding device 12 includes a flexible force control component 121 and an abrasive component 122. The abrasive component 122 is connected to the flexible force control component 121, and the flexible force control component 121 is connected to the robotic arm 11 via a connecting flange (not shown in the figure). The flexible force control component 121 is configured to automatically adjust and maintain a constant grinding force based on the force generated at different grinding surfaces during the grinding process.

[0035] Optionally, the flexible grinding device 12 further includes a flexible force control sensor (not shown), which can be disposed between the flexible force control component 121 and the abrasive component 122. In other embodiments, the flexible force control sensor can also be disposed on the abrasive component 122. The flexible force control component 121 receives the force generated by the grinding end face through the flexible force control sensor, automatically adjusts and maintains a constant grinding force, and adapts to the curvature and tolerance changes of the workpiece.

[0036] Furthermore, such as Figure 2 As shown, the abrasive assembly 122 may include an electric spindle 1221, a tool holder 1222, and an abrasive 1223. The electric spindle 1221 is connected to the flexible force control assembly 121 and is used to maintain a constant power output. The tool holder 1222 is connected to the electric spindle 1221, and the abrasive 1223 is connected to the tool holder 1222. The abrasive assembly 122 may also include a clamp 1224, which is connected to the flexible force control assembly. The clamp 1224 forms a receiving cavity (not shown), and the electric spindle 1221 is fixed within the receiving cavity.

[0037] The flexible polishing device 12 is in flexible contact, and is self-adaptive to the size and shape variation of the workpiece surface where the welding spot is located. The rotation speed of the motorized spindle 1221 and the polishing force can be adjusted in real time. The flexible polishing device 12 can be precisely controlled, and the automatic constant force control technology can ensure that the polishing force is constant, and the polishing quality is guaranteed. By establishing quantitative polishing process parameters, the process consistency is higher and controllable.

[0038] As shown in Figure 1 , the automatic tool changer 13 is arranged on one side of the flexible polishing device 12. As shown in Figure 5 , the automatic tool changer 13 is arranged on one side of the flexible polishing device 12. Figure 5 is Figure 1 a structural schematic diagram of an embodiment of the automatic tool changer, the automatic tool changer 13 includes a tool magazine 131 and a tool seat 132, the tool seat 132 is arranged in the tool magazine 131, and the tool seat 132 is used to place the abrasive (not shown in the figure) with a tool handle. The tool seat 132 is equipped in the automatic tool changer 13, which is mainly used to fix the abrasive with the tool handle in the tool seat 132 when the abrasive is manually replaced. Figure 5

[0039] The specifications of the tool handle in the tool magazine 131 and the types of the abrasive can be selected according to actual needs. The automatic tool changer 13 is configured to automatically replace the abrasive with the tool handle for the flexible polishing device 12. In the embodiment shown in Figure 5 , the automatic tool changer 13 can accommodate three sets of abrasives with tool handles at the same time, and in other embodiments, the automatic tool changer 13 can accommodate two sets, four sets, five sets, etc. of abrasives with tool handles.

[0040] When the abrasive needs to be replaced, the door of the tool magazine 131 is automatically opened, and the mechanical arm 11 is moved to the tool magazine 131 to enable the flexible polishing device 12 to install a new tool handle, so as to complete the replacement of the abrasive.

[0041] The mechanical arm 11 can set an upper limit value of the number of times of using the abrasive through the control cabinet, and the number of times of using the abrasive is accumulated each time the abrasive is polished, and then compared with the upper limit value. If the upper limit value is exceeded, the mechanical arm 11 automatically takes and replaces the tool.

[0042] Further, an abrasive state detection assembly (not shown in the figure) can also be provided. The abrasive state detection assembly can judge the size of the wear of the abrasive to confirm whether the abrasive needs to be replaced. The abrasive state detection assembly can collect the state data (such as the size of the wear of the abrasive) of the abrasive multiple times, and then change the number of times of using the abrasive according to the state data, thereby saving consumables.

[0043] In this application, the flexible polishing device 12 can automatically replace the tool handle 1222, so that the loss of the beat caused by manual wire feeding can be reduced.

[0044] ​Furthermore, the dust collection device 14 is located around the handle 1222. The dust collection device 14 in this application is a follow-up type. Specifically, as shown... Figure 3 and Figure 4 As shown, Figure 3 yes Figure 1 The diagram shows a structural schematic of one embodiment of the vacuum cleaner device. Figure 4 yes Figure 3 The diagram shows another state of the vacuum cleaner device. The vacuum cleaner device 14 in this application may include a vacuum cover 141, a brush 142 and a louver 143, wherein the brush 142 is movably connected to the vacuum cover 141, and the louver 143 is disposed at the ends of the vacuum cover 141 and the brush 142.

[0045] The louver 143 is used to contact the vehicle body, and the brush 142 is used to form a dust suction chamber 101 with the dust suction hood 141, so that the dust suction chamber 101 can isolate the smoke, fine powder, particles and other materials generated during polishing, and thus suck them away.

[0046] In the industry, for complex working conditions at the interference points of the vehicle body floor, automatic dust collection functions are not installed, and manual cleaning is mostly carried out periodically. This is difficult for personnel to clean, and grinding dust falling onto the tooling equipment can easily cause equipment damage. This application solves this problem by installing a dust collection device 14 at the tool holder 1222 and the abrasive 1223, which can automatically absorb the smoke and dust generated during the grinding process.

[0047] Specifically, the surface of the louver 143 that contacts the vehicle body is an arc surface. Therefore, the dust from the polishing process flies out along the rotation direction of the main shaft with each contact point as the tangent point.

[0048] The brush 142 can be slidably connected to the vacuum cleaner housing 141. The brush 142 has an open state and a closed state. For example... Figure 4 As shown, when the brush 142 is in the closed state, the brush 142 is connected to the dust collection hood 141 to form a dust collection chamber 101, so that when polishing the car body, the dust collection device 14 can suck away the polishing smoke, powder, particles and the like through the dust collection chamber 101.

[0049] like Figure 3 As shown, when the brush 142 is in the open state, the brush 142 is located inside the dust collection cover 141, thus preventing the brush 142 from interfering with other devices.

[0050] Specifically, when polishing the car body, the brush 142 is in the closed state. At this time, the brush 142 and the dust collection hood 141 form a fully enclosed dust collection chamber 101 to block splashing.

[0051] When the tool is replaced, the brush 142 is in an open state, that is, the brush 142 is located in the dust cover 141, so that the replacement of the tool holder 1222 can be avoided.

[0052] Further, the side wall of the dust cover 141 is provided with a guide groove 144, and the outer wall of the brush 142 is provided with a guide rail (not shown), the guide rail and the guide groove 144 are in sliding connection, so that the brush 142 and the dust cover 141 are in sliding connection. The guide groove 144 is provided with a push piece 145, and the push piece 145 is slid to drive the brush 142 to slide relative to the dust cover 141, so that the brush 142 is switched between the open state and the closed state.

[0053] When the tool is replaced, the brush 142 is in an open state, that is, the brush 142 is located in the dust cover 141, so that the replacement of the tool holder 1222 can be avoided.

[0054] As described above, the automatic polishing device 10 provided in the present application integrates the functions of polishing, automatic tool replacement and automatic dust removal, and breaks the inconvenience of single working condition in the original automobile industry. The automatic polishing device 10 of the present application automatically removes the welding spatter, burr and the like after the automobile spot welding process; the automatic polishing device 10 based on the project demand and practice of the automobile industry continuously accumulates and breaks through in the technical dimension, product dimension, scheme dimension and process dimension involved in the polishing and polishing scene, helps the automobile industry to complete the complex tasks that are difficult to be automated in the past, and optimizes the polishing cost.

[0055] The above-described embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above-described embodiments are included in the protection scope of the technical solutions.

Claims

1. An automatic grinding device for an automobile welding production line, characterized by, The automatic polishing device comprises: a mechanical arm, a flexible polishing device comprising a flexible force control assembly and an abrasive assembly, the flexible force control assembly being connected to the mechanical arm, the abrasive assembly being connected to the flexible force control assembly, the flexible force control assembly being configured to automatically adjust the polishing force of the abrasive assembly; an automatic tool changing device arranged on one side of the flexible polishing device, the automatic tool changing device comprising a tool magazine and a tool seat, the tool seat being arranged in the tool magazine, the tool seat being used to place the abrasive material with a tool handle; a dust collection device arranged at the end of the abrasive assembly, the dust collection device comprising a dust collection shell and a brush, wherein the brush is movably connected to the dust collection shell, and the brush is used to be connected to the dust collection shell to form a dust collection cavity.

2. The automatic polishing apparatus according to claim 1, characterized by, The brush has a closed state and an open state, in the closed state, the brush and the dust collection shell form the dust collection cavity; in the open state, the brush is located in the dust collection shell.

3. The automatic polishing apparatus according to claim 2, characterized by, The brush and the dust collection shell are slidably connected.

4. The automatic polishing apparatus according to claim 3, characterized by The side wall of the dust collection shell is provided with a guide groove, and the outer wall of the brush is provided with a guide rail, and the guide rail and the guide groove are slidably connected.

5. The automatic polishing apparatus according to claim 4, characterized by The guide groove is provided with a push piece, and the push piece and the guide groove are slidably connected, and the push piece is used to push the brush to move.

6. The automatic polishing apparatus according to claim 1, wherein The dust collection device further comprises a louver, and the louver is arranged at the end of the dust collection shell and the brush, and the louver is used to contact the vehicle body.

7. The automatic polishing apparatus according to claim 6, characterized by The surface of the louver contacting the vehicle body is an arc surface.

8. The automatic polishing apparatus according to claim 1, characterized by The flexible polishing device comprises a flexible force control sensor, and the flexible force control sensor is connected to the abrasive assembly.

9. The automatic polishing apparatus according to claim 1, wherein The abrasive assembly comprises an electric spindle, a tool handle and an abrasive material, wherein the electric spindle is connected to the flexible force control assembly, the tool handle is connected to the electric spindle, the abrasive material is connected to the tool handle, and the dust collection device is arranged at the periphery of the tool handle.

10. The automatic polishing apparatus according to claim 9, characterized by The abrasive assembly further comprises a clamp, wherein the clamp is connected to the flexible force control assembly, the clamp forms a receiving cavity, and the electric spindle is fixed in the receiving cavity.

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