Clamping jig and laser etching equipment

Abstract

The utility model discloses a clamping jig and laser etching equipment. The clamping jig comprises a base, a fixed part and a movable part, the fixing piece is connected with the base; the moving part is in sliding connection with the base, the moving part is driven to move towards the fixed part, and the fixed part and the moving part can clamp the two sides of a workpiece correspondingly; wherein the base is provided with a positioning groove, when a workpiece is clamped, at least part of the workpiece is exposed out of the positioning groove, the groove wall of the positioning groove is provided with a first protrusion, and the first protrusion is used for abutting against the end face of the workpiece and supporting the workpiece. According to the clamping jig, the contact area between a workpiece and the clamping jig can be increased on the premise that positioning feature points are not shielded, so that the positioning and supporting stability is improved.

Description

Technical Field

[0001] The utility model relates to the field of tooling fixtures, in particular to a clamping fixture and laser engraving equipment. Background Art

[0002] In the manufacturing process of cylindrical workpieces such as cylindrical batteries, the workpieces need to be clamped and positioned. Cylindrical workpieces are often positioned based on the end faces at both ends of their axial direction. For example, in the laser engraving process of cylindrical batteries, one of the end faces of the cylindrical battery needs to be placed on a clamping fixture for positioning. The clamping fixture has a hollow area. After the cylindrical battery is installed, the positioning feature points on its end face can be exposed to facilitate laser engraving processing and positioning.

[0003] However, if the hollow area of ​​the clamping fixture is too small, it will block the positioning feature points; if the hollow area is too large, the contact area between the cylindrical battery and the clamping fixture will be smaller, which will easily lead to inaccurate positioning and unstable support, affecting the yield rate of the laser engraving process. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a clamping fixture that can increase the contact area between the workpiece and the clamping fixture without blocking the positioning feature points, so as to improve the stability of positioning and support.

[0005] The utility model also provides a laser engraving device having the clamping fixture.

[0006] The clamping fixture according to the first embodiment of the utility model includes:

[0007] Pedestal;

[0008] A fixing member connected to the base;

[0009] A moving member, wherein the moving member is slidably connected to the base, the moving member is driven to move toward the fixed member, and the fixed member and the moving member can be clamped on two sides of the workpiece respectively;

[0010] Wherein, the base is provided with a positioning groove, and when the workpiece is clamped, the positioning groove exposes at least a portion of the workpiece, and the groove wall of the positioning groove is provided with a first protrusion, and the first protrusion is used to abut against the end face of the workpiece and support the workpiece.

[0011] The clamping fixture according to the embodiment of the utility model has at least the following beneficial effects:

[0012] A first protrusion is provided on the groove wall of the positioning groove, and the first protrusion is used to abut against the end face of the workpiece to support the workpiece. The setting of the first protrusion can increase the contact area between the workpiece and the base without blocking the positioning feature points, prevent the workpiece from tilting during the clamping process, improve the accuracy of workpiece positioning and the stability during the processing, thereby improving the laser engraving yield of the workpiece.

[0013] According to some embodiments of the present invention, the first protrusion includes an abutting portion and an extending portion. One end of the extending portion is connected to the groove wall, and the other end extends towards the center of the positioning groove to form a free end. The abutting portion is connected to the free end of the extending portion;

[0014] Wherein, when the workpiece is clamped, the abutting portion abuts against the central area of the workpiece.

[0015] According to some embodiments of the present invention, a plurality of second protrusions are further provided on the groove wall of the positioning groove. The protruding length of the second protrusion is less than the protruding length of the first protrusion, and the plurality of second protrusions are arranged at intervals along the circumferential direction of the positioning groove;

[0016] Wherein, when the workpiece is clamped, the second protrusion abuts against the edge area of the workpiece.

[0017] According to some embodiments of the present invention, the fixing member is provided with a groove for accommodating the workpiece. The groove has a first wall surface and a second wall surface, and the first wall surface and the second wall surface intersect. Both the first wall surface and the second wall surface are used to abut against the outer periphery of the workpiece.

[0018] According to some embodiments of the present invention, the fixing member is provided with a plurality of the grooves, and the number of the moving members corresponds to the number of the grooves.

[0019] According to some embodiments of the present invention, the clamping fixture includes two of the fixing members, and the openings of the grooves of the two fixing members face in opposite directions.

[0020] According to some embodiments of the present invention, the base is provided with a guiding groove extending along the moving direction of the moving member, and at least a part of the moving member is located in the guiding groove.

[0021] According to some embodiments of the present invention, the clamping fixture further includes an elastic member. One end of the elastic member is connected to the base, and the other end abuts against the moving member. The elastic member is used to drive the moving member to abut against the workpiece.

[0022] According to some embodiments of the present utility model, the moving member has a first end that abuts against the workpiece, and a third protrusion is provided on the top surface of the moving member. The third protrusion is provided away from the first end. When the moving member abuts against the workpiece, the third protrusion is spaced apart from the workpiece.

[0023] A laser engraving device according to an embodiment of the second aspect of the present utility model includes:

[0024] A processing mechanism;

[0025] The clamping fixture as described in any one of the above embodiments, which is used to fix the workpiece to facilitate processing by the processing mechanism.

[0026] The laser engraving device according to the embodiment of the present utility model has at least the following beneficial effects:

[0027] By adopting this clamping fixture, the clamping efficiency of the laser engraving device is significantly improved, and the clamping effect is good, so that the laser engraving device can achieve precise positioning through the positioning feature points on the workpiece, thereby obtaining higher processing accuracy and higher processing yield.

[0028] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0030] Figure 1 is a schematic structural diagram of the clamping fixture according to the embodiment of the present utility model;

[0031] Figure 2 is a top view of the clamping fixture according to the embodiment of the present utility model;

[0032] Figure 3 is Figure 2 an enlarged schematic view of area A in

[0033] Figure 4 is an exploded schematic view of the clamping fixture according to the embodiment of the present utility model;

[0034] Figure 5 is a perspective view of the clamping fixture according to the embodiment of the present utility model.

[0035] Reference numerals:

[0036] Base 100; positioning groove 110; first protrusion 111; abutting portion 1111; extending portion 1112; second protrusion 112; guiding groove 120; mounting portion 130; guiding column 131;

[0037] Fixing member 200; groove 210; first wall surface 211; second wall surface 212;

[0038] Moving member 300; third protrusion 310;

[0039] Elastic member 400. Detailed implementation mode

[0040] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0042] In the description of the present invention, the meaning of several is more than one, the meaning of multiple is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0044] In the description of the present invention, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" 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 invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] In the manufacturing process of cylindrical workpieces such as cylindrical batteries, the workpieces need to be clamped and positioned. Cylindrical workpieces are often positioned based on the end faces at both ends of their axial direction. For example, in the laser engraving process of cylindrical batteries, one of the end faces of the cylindrical battery needs to be placed on a clamping fixture for positioning. The clamping fixture has a hollow area. After the cylindrical battery is installed, the positioning feature points on its end face can be exposed to facilitate laser engraving processing and positioning.

[0046] However, if the hollow area of ​​the clamping fixture is too small, it will block the positioning feature points; if the hollow area is too large, the contact area between the cylindrical battery and the clamping fixture will be smaller, which will easily lead to inaccurate positioning and unstable support, affecting the yield rate of the laser engraving process.

[0047] To solve the above problems, the first embodiment of the present application proposes a clamping fixture, which is used to clamp a workpiece. It can be understood that the clamping fixture is suitable for cylindrical workpieces, and is also suitable for workpieces with square, elliptical or other cross-sectional shapes. Figures 1 to 5 As shown, the clamping fixture includes a base 100, a fixing part 200 and a moving part 300. The fixing part 200 is fixedly arranged on the base 100. The fixing part 200 and the base 100 can be manufactured separately and then connected into an integral structure by threaded connection, welding and other connection methods. Alternatively, the fixing part 200 can also be integrally formed with the base 100 and formed by an integrated processing technology such as casting and injection molding. Alternatively, the fixing part 200 and the base 100 can also be formed by removing material from a whole piece of basic material.

[0048] The moving member 300 is slidably connected to the base 100, and the moving member 300 is driven to move toward the fixed member 200. The moving member 300 may be driven by a power source such as a motor, an electric cylinder or a pneumatic cylinder, or may be driven by the elastic member 400. The workpiece is placed between the fixed member 200 and the moving member 300. When the moving member 300 is subjected to an external driving force, it can move relative to the base 100, so that the distance between the moving member 300 and the fixed member 200 is gradually reduced until the moving member 300 abuts against the workpiece and pushes the workpiece to abut against the fixed member 200. Then, the fixed member 200 limits the further displacement of the moving member 300, and the fixed member 200 and the moving member 300 are respectively clamped on both sides of the workpiece to fix the workpiece on the base 100.

[0049] It should be noted that the material of the moving part 300 and the fixing part 200 is a material with relatively low hardness, such as PEEK (polyetheretherketone), etc., which can prevent the moving part 300 and the fixing part 200 from scratching the workpiece when they come into contact with the workpiece. Alternatively, the parts of the moving part 300 and the fixing part 200 that are used to come into contact with the workpiece are coated with a material with relatively low hardness, which can also reduce the possibility of scratching the workpiece.

[0050] Corresponding to the position after the workpiece is clamped and fixed, the base 100 is provided with a positioning groove 110. When the workpiece is clamped, at least part of the workpiece is exposed through the positioning groove 110. Taking the clamping fixture shown in Figure 1 as an example of being arranged horizontally, when the workpiece is clamped, in the direction from bottom to top, the lower end face of the workpiece can be seen through the positioning groove 110. Thus, the CCD camera or other recognition mechanism arranged below the clamping fixture can recognize the positioning feature points arranged on the lower end face of the workpiece. In some embodiments, the workpiece is a cylindrical structure. For example, the workpiece can be a cylindrical battery. In the projection on the base 100 in the vertical direction, most of the projection area of the workpiece falls within the projection area of the positioning groove 110, and part of the edge area of the workpiece falls outside the projection area of the positioning groove 110. In other embodiments, the outer diameter of the workpiece can also be smaller than the inner diameter of the positioning groove 110, so that the projection area of the workpiece entirely falls within the projection area of the positioning groove 110.

[0051] To support the workpiece to prevent the workpiece from slipping out of the positioning groove 110 or tilting in the positioning groove 110, as shown in Figure 2 the groove wall of the positioning groove 110 is convexly provided with a first protrusion 111. The first protrusion 111 is used to abut against the lower end face of the workpiece to support the workpiece. The setting of the first protrusion 111 can increase the contact area between the workpiece and the base 100 without blocking the positioning feature points, prevent the workpiece from tilting during the clamping process, improve the accuracy of workpiece positioning and the stability during the processing, thereby improving the laser engraving yield rate of the workpiece and the passing rate of the re-inspection.

[0052] In some embodiments, as shown in Figure 2 and Figure 3 the first protrusion 111 includes an abutting portion 1111 and an extending portion 1112. One end of the extending portion 1112 is connected to the groove wall, and the other end extends towards the center of the positioning groove 110 to form a free end. The abutting portion 1111 is connected to the free end of the extending portion 1112. Taking the workpiece to be clamped as a cylindrical workpiece as an example, the shape of the abutting portion 1111 is also cylindrical. When the workpiece is clamped, the central axis of the workpiece is coaxially arranged with the central axis of the abutting portion 1111. The outer diameter of the abutting portion 1111 is smaller than the outer diameter of the workpiece. Thus, the abutting portion 1111 abuts against the central region of the workpiece.

[0053] In addition, a plurality of second protrusions 112 are further provided on the groove wall of the positioning groove 110. The protruding length of the second protrusions 112 is smaller than the protruding length of the first protrusion 111. The plurality of second protrusions 112 are arranged at intervals along the circumferential direction of the positioning groove 110, as shown in Figure 3As shown, four second protrusions 112 are evenly distributed along the circumferential direction of the positioning groove 110. When the workpiece is clamped, the second protrusions 112 abut against the edge area of the workpiece. Furthermore, the first protrusion 111 plays a supporting role for the center of the workpiece and provides a large contact area to facilitate the positioning and support of the workpiece. The second protrusion 112 plays an auxiliary supporting role for the edge of the workpiece to reduce the possibility of the workpiece tilting during the clamping process.

[0054] In some embodiments, the fixing member 200 is provided with a groove 210. When being clamped, the workpiece can be partially received in the groove 210 and abut against the groove wall of the groove 210, and the movement of the workpiece is restricted by the groove wall of the groove 210. In some more specific embodiments, the groove 210 can be a profiling groove. For example, when the workpiece is of a cylindrical structure, the groove is a semi-open arc-shaped groove. In some other specific embodiments, such as Figure 2 , Figure 3 and Figure 4 As shown, the groove 210 has a first wall surface 211 and a second wall surface 212, and the first wall surface 211 and the second wall surface 212 are intersectingly arranged. When the cylindrical workpiece is embedded in the groove 210, the first wall surface 211 and the second wall surface 212 respectively abut against the outer circumference of the workpiece. It can be understood that the groove 210 of this structure can allow the workpiece to have a certain dimensional error. When the outer diameter of the workpiece is larger or smaller, the workpiece can respectively have line contact with the two wall surfaces, so as to realize the clamping and abutting of the workpiece.

[0055] Furthermore, a plurality of grooves 210 are provided on one fixing member 200. As shown in Figure 1 and Figure 2 , perpendicular to the moving direction of the moving member 300, the plurality of grooves 210 are arranged at intervals, and the number of the moving members 300 corresponds to the number of the grooves 210. Thus, multiple workpieces can be clamped and positioned on one base 100 at the same time, greatly improving the clamping and processing efficiency of the workpieces. Further, in the embodiments shown in Figure 1 and Figure 2 , the clamping fixture includes two fixing members 200, and the openings of the grooves 210 of the two fixing members 200 face in opposite directions. While improving the clamping processing ability of the clamping fixture, through the reasonable layout of the positions and orientations of the fixing members 200, the miniaturization of the clamping fixture is realized.

[0056] In some embodiments, corresponding to the position of the groove 210 of the fixing member 200, a guiding groove 120 extending along the moving direction of the moving member 300 is provided on the base 100. At least a part of the moving member 300 is located in the guiding groove 120, so that the two side walls of the guiding groove 120 can guide the movement of the moving member 300 to achieve stable abutment with the workpiece and stably push the workpiece along a preset track to abut against the fixing member 200. Moreover, the two end walls of the guiding groove 120 in the moving direction can limit the moving stroke of the moving member 300.

[0057] In some embodiments, the moving member 300 is connected by a driving source such as a motor or a cylinder, and the driving source can drive the moving member 300 to move towards the fixing member 200 or away from the fixing member 200. In other embodiments, the moving member 300 is driven by an elastic member 400. Specifically, as Figure 4 shown, the base 100 further includes a mounting portion 130. A plurality of guiding columns 131 extending along the moving direction of the moving member 300 are provided on the mounting portion 130. An elastic member 400 is sleeved on each guiding column 131. One end of the elastic member 400 abuts against the mounting portion 130, and the other end abuts against the moving member 300.

[0058] In the initial state, the elastic member 400 is in a natural elongation state, and the distance between the moving member 300 and the fixing member 200 is not greater than the outer diameter of the workpiece. Before placing the workpiece between the moving member 300 and the fixing member 200, it is necessary to first drive the moving member 300 to move away from the fixing member 200 to leave enough space for accommodating the workpiece, and then place the workpiece between the moving member 300 and the fixing member 200. During the process of the moving member 300 moving away from the fixing member 200, the elastic member 400 is compressed and stores elastic potential energy. After the external driving force is eliminated, the elastic member 400 recovers its elastic deformation and is guided by the guiding column 131 to drive the moving member 300 to move in the direction close to the fixing member 200. Under the pushing action of the elastic member 400, the moving member 300 moves in a straight line in the guiding groove 120, which can effectively prevent the moving member 300 from getting stuck. The moving member 300 moves towards the fixing member 200 until it abuts against the workpiece, thereby clamping and fixing the workpiece. It can be understood that by calculating the compression amount and elastic coefficient of the elastic member 400, the clamping force of the moving member 300 can be effectively ensured to be within the bearing range of the workpiece, avoiding damaging the workpiece.

[0059] In some embodiments, the moving member 300 has a first end that abuts against the workpiece. A third protrusion 310 is provided on the top surface of the moving member 300. The third protrusion 310 is provided away from the first end. When the moving member 300 abuts against the workpiece, the third protrusion 310 is spaced from the workpiece. It can be understood that the third protrusion 310 facilitates manual or machine application of force to drive the moving member 300 to move in the direction away from the fixing member 200.

[0060] In the second aspect of the embodiments of the present application, a laser engraving device is proposed. The laser engraving device includes a processing mechanism and the clamping fixture mentioned in any one of the above embodiments. The clamping fixture is used to fix the workpiece, so as to facilitate the laser engraving processing of the workpiece by the processing mechanism. It can be understood that by adopting this clamping fixture, the clamping efficiency of the laser engraving device is significantly improved, and the clamping effect is good, so that the laser engraving device can achieve precise positioning through the positioning feature points on the workpiece, so as to obtain higher processing accuracy and higher processing yield.

[0061] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. Clamping fixture, used for clamping a workpiece, characterized in that, Comprising: A base; A fixing member, which is connected to the base; A moving member, which is slidably connected to the base. The moving member is driven to move towards the fixing member, and the fixing member and the moving member can respectively clamp both sides of the workpiece; Wherein, the base is provided with a positioning groove. When the workpiece is clamped, at least part of the workpiece is exposed in the positioning groove. The groove wall of the positioning groove is provided with a first protrusion, and the first protrusion is used to abut against the end face of the workpiece and support the workpiece.

2. The clamping fixture according to claim 1, wherein The first protrusion includes an abutting portion and an extending portion. One end of the extending portion is connected to the groove wall, and the other end extends towards the center of the positioning groove to form a free end. The abutting portion is connected to the free end of the extending portion; Wherein, when the workpiece is clamped, the abutting portion abuts against the central area of the workpiece.

3. The clamping fixture according to claim 1, wherein, The groove wall of the positioning groove is further provided with a plurality of second protrusions. The protruding length of the second protrusions is less than the protruding length of the first protrusion, and the plurality of second protrusions are arranged at intervals along the circumferential direction of the positioning groove; Wherein, when the workpiece is clamped, the second protrusions abut against the edge area of the workpiece.

4. The clamping fixture according to claim 1, wherein The fixing member is provided with a groove for accommodating the workpiece. The groove has a first wall surface and a second wall surface, and the first wall surface and the second wall surface intersect. Both the first wall surface and the second wall surface are used to abut against the outer periphery of the workpiece.

5. The clamping fixture according to claim 4, characterized in that, The fixing member is provided with a plurality of such grooves, and the number of the moving members corresponds to the number of the grooves.

6. The clamping fixture according to claim 4, characterized in that, The clamping fixture includes two such fixing members, and the openings of the grooves of the two fixing members face in opposite directions.

7. The clamping fixture according to claim 1, characterized in that, The base is provided with a guiding groove extending along the moving direction of the moving member, and at least part of the moving member is located in the guiding groove.

8. The clamping fixture according to claim 1, wherein, The clamping fixture further includes an elastic member. One end of the elastic member is connected to the base, and the other end abuts against the moving member. The elastic member is used to drive the moving member to abut against the workpiece.

9. The clamping fixture according to claim 1, characterized in that, The moving member has a first end that abuts against the workpiece. A third protrusion is provided on the top surface of the moving member, and the third protrusion is arranged away from the first end. When the moving member abuts against the workpiece, the third protrusion is arranged at an interval from the workpiece.

10. Laser engraving device, characterized in that, Comprising: A processing mechanism; The clamping fixture according to any one of claims 1 to 9, which is used to fix the workpiece so as to facilitate the processing by the processing mechanism.

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