Automatic clamp

Abstract

The utility model relates to the technical field of machining, and provides an automatic clamp which comprises a mounting base, a mounting plate, a front pressing plate, a right-angle plate, a side pressing plate, a connecting piece, a driving piece and a guiding piece. A mounting groove is formed in the mounting seat; the driving piece and the guiding piece which are used for providing telescopic driving are both mounted in the mounting groove; the connecting piece is in sliding connection with the guide piece and is connected with the telescopic end of the driving piece; the right-angle plate is provided with a bent right angle to form a side edge and a straight edge, the front pressing plate is installed on the straight edge, and the side pressing plate is installed on the side edge; the mounting plate covers the mounting groove, and a workpiece is located on the mounting plate; the driving piece drives the connecting piece to move along the guiding piece and synchronously drives the right-angle plate to move, so that the front pressing plate and the side pressing plate clamp the workpiece. The high-precision clamping device has the high-precision clamping effect.

Description

Technical Field

[0001] This application relates to the field of machining technology, and particularly to an automatic fixture. Background Art

[0002] There are various types of fixtures. In different production environments, people have different requirements for fixtures. For example, in existing numerically controlled machine tools, when machining workpieces, fixtures are needed to fix the workpieces at a certain position to facilitate the machining of the workpieces. When machining precision workpieces, it is required that the fixtures have the advantages of rapid clamping, high-precision positioning, stable clamping, and small deformation.

[0003] There are also automatic fixtures among the existing fixtures, but generally there are problems with relatively poor clamping accuracy, and the workpiece may slide to the side without a clamping surface. Summary of the Invention

[0004] In order to improve the above problems, this application provides an automatic fixture.

[0005] The automatic fixture provided by this application adopts the following technical solutions:

[0006] An automatic fixture includes a mounting base, a mounting plate, a front pressing plate, a right-angle plate, a side pressing plate, a connecting member, a driving member, and a guiding member; a mounting groove is formed on the mounting base; the driving member providing telescopic driving and the guiding member are both installed in the mounting groove; the connecting member is slidably connected to the guiding member and is connected to the telescopic end of the driving member; the right-angle plate has a bent right angle, forming a side edge and a straight edge, the front pressing plate is installed on the straight edge, and the side pressing plate is installed on the side edge; the mounting plate covers the mounting groove, and the workpiece is located on the mounting plate; the driving member drives the connecting member to move along the guiding member, synchronously driving the right-angle plate to move, so that the front pressing plate and the side pressing plate clamp the workpiece.

[0007] By adopting the above technical solutions, when it is necessary to clamp the workpiece, the driving member drives the connecting member to move along the guiding member. The right-angle plate is located on the connecting member. Therefore, when the connecting member moves, the right-angle plate is synchronously driven to move, so that the front pressing plate and the side pressing plate move towards the workpiece, thereby clamping the workpiece. Through the reasonable structural design, combination, and pneumatic control of this application, efficient positioning and stable clamping of flat workpieces are achieved.

[0008] Optionally, the driving track of the driving member is at 45 degrees, and the guiding member is installed at 45 degrees.

[0009] By adopting the above technical solutions, the moving track of the right-angle plate is at 45 degrees, moving from a corner of the mounting base, realizing synchronous movement and synchronous clamping of the front pressing plate and the side pressing plate to the workpiece.

[0010] Optionally, the front pressing plate, the right-angle plate, the side pressing plate, the connecting member, the driving member, and the guiding member are set as a clamping group. Two sets of the clamping groups are provided on the mounting base, respectively located at two opposite inclined angles of the mounting base and arranged symmetrically.

[0011] By adopting the above technical solution, the front pressing plates and the side pressing plates of the two clamping groups respectively correspond to the four sides of the workpiece or the mounting base. When the two clamping groups move relatively, the two front pressing plates and the two side pressing plates respectively abut against the four corners of the workpiece, thereby clamping the workpiece stably and achieving high-precision clamping of the four surfaces.

[0012] Optionally, the mounting base is further provided with a vacuum chuck and an air pipe joint; the vacuum chuck is fixed on the mounting plate; one end of the air pipe joint is connected to an external vacuum pump, and the other end is connected to the vacuum chuck.

[0013] By adopting the above technical solution, the air pipe joint can provide negative pressure to the vacuum chuck through an external vacuum pump, and then utilize the vacuum chuck to achieve an adsorption effect, so that in addition to being clamped by the two clamping groups, the workpiece can also be adsorbed by the negative pressure adsorption force of the vacuum chuck, further improving the clamping stability.

[0014] Optionally, the vacuum chuck is provided with a plurality of suction cup openings, which are evenly distributed.

[0015] By adopting the above technical solution, the plurality of evenly distributed suction cup openings can make the negative pressure adsorption force provided by the vacuum chuck more uniform, so that the negative pressure adsorption range of the workpiece is wider and more uniform, further increasing the fastening of the adsorption.

[0016] Optionally, the guiding member is further provided with a limiting portion.

[0017] By adopting the above technical solution, the limiting portion is used to prevent the connecting member from moving excessively, provide limitation to the connecting member, and at the same time can also prevent the connecting member from disengaging from the guiding member.

[0018] Optionally, the mounting plate is provided with a detachable positioning portion.

[0019] By adopting the above technical solution, the positioning portion can position the workpiece. For example, when there is a through hole on the surface of the workpiece, it penetrates through the positioning portion to prevent the workpiece from disengaging, and at the same time also provides a positioning function to prevent the position of the workpiece from shifting.

[0020] Optionally, the mounting base is further connected with a water baffle.

[0021] By adopting the above technical solution, the water baffle can prevent water splashing from the outside onto the workpiece when the workpiece is clamped.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When the workpiece needs to be clamped, the driving member drives the connecting member to move along the guiding member. The right-angle plate is located on the connecting member. Therefore, when the connecting member moves, the right-angle plate is synchronously driven to move, causing the front pressing plate and the side pressing plate to move towards the workpiece, thereby clamping the workpiece. Through the reasonable structural design, combination, and pneumatic control of this application, efficient positioning and stable clamping of flat workpieces are achieved.

[0024] 2. The moving trajectory of the right-angle plate is at 45 degrees, moving from a corner of the mounting base, realizing the synchronous movement and synchronous clamping of the front pressing plate and the side pressing plate to the workpiece.

[0025] 3. The front pressing plates and the side pressing plates of the two clamping groups respectively correspond to the four sides of the workpiece or the mounting base. When the two clamping groups move relatively, the two front pressing plates and the two side pressing plates respectively abut against the four corners of the workpiece, thereby clamping the workpiece stably.

[0026] 4. The air pipe joint can provide negative pressure to the vacuum chuck through an external vacuum pump, and then utilize the vacuum chuck to achieve the adsorption effect, so that in addition to being clamped by the two clamping groups, the workpiece can also be adsorbed by the negative pressure adsorption force of the vacuum chuck, further improving the clamping stability. Description of the Drawings

[0027] Figure 1 is a three-dimensional structural schematic diagram of the fixture in an embodiment of this application;

[0028] Figure 2 is a cross-sectional structural schematic diagram in the downward viewing direction below the mounting plate of the fixture in some embodiments of this application;

[0029] Figure 3 is a three-dimensional structural schematic diagram of the fixture in a state where the workpiece is separated in some embodiments of this application;

[0030] The reference signs in the drawings are: 1, mounting base; 11, mounting groove; 12, vacuum chuck; 121, suction cup opening; 13, air pipe joint; 14, positioning portion; 15, water baffle; 2, mounting plate; 3, front pressing plate; 4, right-angle plate; 5, side pressing plate; 6, connecting member; 7, driving member; 8, guiding member; 81, limiting portion; 9, workpiece. Detailed Embodiments

[0031] The following uses specific specific examples to illustrate the embodiments of this application. Those skilled in the art can easily understand the other advantages and effects of this application from the information disclosed in this application. This application can also be implemented or applied through other different specific embodiments. The details in this application can also be variously modified or changed according to different viewpoints and applications without departing from the spirit of this application. It should be noted that, without conflict, the embodiments and the features in the embodiments in this application can be combined with each other.

[0032] The following will be a detailed description of the embodiments of the present application with reference to the accompanying drawings, so that those skilled in the technical field to which the present application pertains can easily implement it. The present application can be embodied in various different forms and is not limited to the embodiments described herein.

[0033] In the description of the present application, the representations referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics represented can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples represented in the present application and the features of different embodiments or examples.

[0034] In addition, the terms "first" and "second" are only used for indicating purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and clearly defined.

[0035] Throughout the specification, when it is said that a certain device is "connected" to another device, this includes not only the case of "direct connection", but also the case of "indirect connection" with other elements placed therebetween. In addition, when it is said that a certain device "includes" a certain component, unless there is a particularly contrary record, it does not exclude other components, but means that other components can also be included.

[0036] The following will be a further detailed description of the present application in combination with the attached Figure 1 - attached Figure 3 , for a further detailed description of the present application.

[0037] The embodiments of the present application disclose an automatic fixture.

[0038] An automatic fixture, this design belongs to the innovative design of clamping fixtures in the machinery industry and is mainly applied to the processing of flat workpieces. Therefore, the workpieces of the present application are flat workpieces.

[0039] Refer to Figure 1 and Figure 2As shown in the figure, it includes a mounting base, a mounting plate, a front pressing plate, a right-angle plate, a side pressing plate, a connecting piece, a driving piece, and a guiding piece; the mounting base is composed of a surrounding plate, a bottom plate, and a connecting frame. The surrounding plate is used to form a rectangular closed structure of the fixture, which can be specifically made of steel plate, having good structural strength and wear resistance. An installation groove is provided on the mounting base, and the installation groove is a groove-shaped space formed by the closed structure surrounded by the surrounding plate and the bottom plate.

[0040] The driving piece and the guiding piece that provide telescopic driving are both installed in the installation groove. The driving piece can adopt a cylinder, and the guiding piece can adopt a guiding rail. The telescopic direction of the cylinder is the same as the guiding direction of the guiding rail.

[0041] The connecting piece is slidably connected to the guiding piece and is connected to the telescopic end of the driving piece. The connecting piece can adopt a connecting plate. According to the shape of the mounting base, the connecting plate can be divided into a long connecting plate and an inclined connecting plate, corresponding to the length and corner of the mounting base respectively. A slider can be provided at the bottom of the connecting piece, and the slider is used to slidably connect with the guiding piece, so that when the connecting piece is driven by the driving piece, the moving track of the connecting piece is fixed.

[0042] The right-angle plate has a bent right angle, forming a side edge and a straight edge. The front pressing plate is installed on the straight edge, and the side pressing plate is installed on the side edge. Both the front pressing plate and the side pressing plate are used to contact and clamp the workpiece. The mounting plate covers the installation groove, and the mounting plate provides a placement for the workpiece. The horizontal height of the front pressing plate and the side pressing plate is above the mounting plate. Therefore, the workpiece on the mounting plate can be clamped and fixed.

[0043] Specifically, the driving piece drives the connecting piece to move along the guiding piece. The right-angle plate is located on the connecting piece. Therefore, when the connecting piece moves, it synchronously drives the right-angle plate to move, so that the front pressing plate and the side pressing plate move towards the workpiece, thereby clamping the workpiece. Through the reasonable structural design, combination, and pneumatic control of the present application, efficient positioning and stable clamping of flat workpieces are achieved.

[0044] Among them, referring to Figure 2 As shown in the figure, the driving track of the driving piece is at a 45-degree angle, and the guiding piece is installed at a 45-degree angle, so that the moving track of the right-angle plate is at a 45-degree angle, moving from a corner of the mounting base. The front pressing plate and the side pressing plate move synchronously and abut against the workpiece for clamping.

[0045] Among them, the front pressing plate, the right-angle plate, the side pressing plate, the connecting piece, the driving piece, and the guiding piece are set as a clamping group. There are two clamping groups provided on the mounting base, which are respectively located at two opposite inclined corners of the mounting base and are symmetrically arranged. The two clamping groups are synchronously driven, so that the front pressing plates and the side pressing plates of the two clamping groups respectively correspond to the four sides of the workpiece or the mounting base. When the two clamping groups move relatively respectively, the two front pressing plates and the two side pressing plates respectively abut against the four corners of the workpiece, thereby clamping the workpiece stably.

[0046] Meanwhile, the driving direction of the driving member is 45 degrees. Therefore, the workpiece is stressed at two opposite corners, and the stress is distributed along two sides through the front pressing plate and the side pressing plate. Compared with directly clamping the opposite sides, the stress is more stable, which can prevent the workpiece from being bent due to excessive stress.

[0047] Wherein, compression pads can be arranged on the sides of the front pressing plate and the side pressing plate close to the workpiece. The compression pads can be made of rubber pads or plastic pads, which can prevent damage to the workpiece when the front pressing plate and the side pressing plate are in rigid contact with the workpiece.

[0048] In some embodiments, referring to Figure 3 As shown, the mounting seat is also provided with a vacuum chuck and a tracheal joint; the vacuum chuck is fixed on the mounting plate, and the vacuum chuck can provide a negative pressure adsorption force, so that in addition to being clamped by two sets of clamping groups, the workpiece can also be adsorbed by the negative pressure adsorption force of the vacuum chuck, further improving the clamping stability.

[0049] One end of the tracheal joint is connected to an external vacuum pump, and the other end is connected to the vacuum chuck. An intake pipe is connected between the tracheal joint and the vacuum pump and is hidden inside the mounting seat and not shown in the figure. The tracheal joint can supply negative pressure to the vacuum chuck through the external vacuum pump, and then use the vacuum chuck to achieve the adsorption effect.

[0050] Wherein, several tracheal joints can be provided to make the negative pressure supply in the vacuum chuck stable, reduce air leakage and other situations, and prevent the phenomenon that the negative pressure adsorption force provided by the vacuum chuck is insufficient. The specified number of tracheal joints can also be connected according to the style of the workpiece to reduce the negative pressure adsorption force, which can reduce the bending and other situations of thinner flat workpieces due to excessive negative pressure adsorption force.

[0051] Furthermore, referring to Figure 3 As shown, the vacuum chuck is provided with several suction ports, which are evenly distributed. The evenly distributed suction ports can make the negative pressure adsorption force provided by the vacuum chuck more uniform, so that the negative pressure adsorption range of the workpiece is wider and more uniform, further increasing the fastening of the adsorption.

[0052] In some embodiments, referring to Figure 2 As shown, the guide rail is also provided with a limiting portion, which can be a limiting block or a limiting plate and is installed at the end of the guiding member to prevent the connecting member from moving excessively, provide limitation for the connecting member, and at the same time avoid the connecting member from detaching from the guiding member.

[0053] In some embodiments, referring to Figure 1 or Figure 3As shown in the figure, the mounting plate is provided with a detachable positioning portion. The positioning portion can be a positioning post, which is located at the center of the mounting plate. When a vacuum chuck is provided, a positioning opening for the positioning portion to penetrate can be opened at the center position of the vacuum chuck. The positioning portion can position the workpiece. For example, when a through hole is opened on the surface of the workpiece, it penetrates through the positioning portion to prevent the workpiece from detaching, and at the same time, it also provides a positioning function to prevent the position of the workpiece from shifting.

[0054] The detachable connection can be a screw connection. Threaded holes are opened on the mounting plate, and an external thread can be opened at one end of the positioning portion. The external thread is used to screw the positioning portion into the threaded hole. When it is necessary to screw the positioning portion into the threaded hole and it is not needed, the positioning portion is removed from the threaded hole, so as to achieve the function of adapting to different application workpieces.

[0055] Furthermore, a telescopic cylinder is also provided in the installation groove. The telescopic cylinder is arranged in the vertical direction, and the telescopic end of the telescopic cylinder is detachably connected to the positioning portion, such as by screwing. The mounting plate is provided with a through hole. The positioning portion can be inserted into the installation groove through the telescopic cylinder, or extended out of the installation groove and passed through the mounting plate or the vacuum chuck through the through hole for positioning, so as to achieve automatic adjustment according to the type of the workpiece. At the same time, the detachable method also facilitates the replacement of the size or style of the positioning portion to further adapt to the workpiece.

[0056] In some embodiments, referring to Figure 1 or Figure 3 As shown in the figure, the mounting seat is also connected with a water baffle. The water baffle can prevent the water splashing from the outside from splashing onto the workpiece when the workpiece is clamped. The water baffle can be made of ABS plastic and has good corrosion resistance. Among them, the water baffle can be inclined at a certain angle so that the water can easily drip along the inclined surface.

[0057] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An automatic fixture, characterized in that, It includes a mounting base (1), a mounting plate (2), a front pressing plate (3), a right-angle plate (4), a side pressing plate (5), a connecting piece (6), a driving piece (7) and a guiding piece (8); a mounting groove (11) is formed on the mounting base (1); the driving piece (7) providing telescopic driving and the guiding piece (8) are both installed in the mounting groove (11); the connecting piece (6) is slidably connected to the guiding piece (8) and is connected to the telescopic end of the driving piece (7); the right-angle plate (4) has a bent right angle, forming a side edge and a straight edge, the front pressing plate (3) is installed on the straight edge, and the side pressing plate (5) is installed on the side edge; the mounting plate (2) covers the mounting groove (11), and the workpiece (9) is located on the mounting plate (2); the driving piece (7) drives the connecting piece (6) to move along the guiding piece (8), synchronously driving the right-angle plate (4) to move, so that the front pressing plate (3) and the side pressing plate (5) clamp the workpiece (9).

2. An automatic fixture according to claim 1, characterized in that, The driving track of the driving piece (7) is at 45 degrees, and the guiding piece (8) is installed at 45 degrees.

3. An automatic fixture according to claim 2, characterized in that, The front pressing plate (3), the right-angle plate (4), the side pressing plate (5), the connecting piece (6), the driving piece (7) and the guiding piece (8) are set as a clamping group, and two sets of the clamping groups are arranged on the mounting base (1), respectively located at two opposite inclined angles of the mounting base (1) and symmetrically arranged.

4. An automatic fixture according to claim 1, characterized in that, The mounting base (1) is further provided with a vacuum chuck (12) and an air pipe joint (13); the vacuum chuck (12) is fixed on the mounting plate (2); one end of the air pipe joint (13) is connected to an external vacuum pump, and the other end is connected to the vacuum chuck (12).

5. An automatic fixture according to claim 4, wherein, The vacuum chuck (12) is provided with a plurality of suction cup openings (121) and is evenly distributed.

6. An automatic fixture according to claim 1, characterized in that, The guiding piece (8) is further provided with a limiting portion (81).

7. An automatic fixture according to claim 1, characterized in that, The mounting plate (2) is provided with a detachable positioning portion (14).

8. An automatic fixture according to claim 1, characterized in that, The mounting base (1) is further connected with a water baffle (15).

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