Flexible part clamp based on magnetorheological fluid

Abstract

The utility model discloses a part flexible clamp based on magnetorheological fluid, and relates to the technical field of workpiece clamping. An abutting mechanism is positioned and mounted on the top surface of the mounting seat, and a pressing mechanism is mounted on the top surface of the mounting seat in a sliding manner; magnetic fluid positioning blocks are installed on the faces, opposite to the pressing mechanism, of the abutting mechanism respectively, a plurality of positioning rods are distributed on the faces, opposite to each other, of the two magnetic fluid positioning blocks respectively, one end of each positioning rod extends into a magnetic fluid deformation cavity of the corresponding magnetic fluid positioning block, and the positioning rods are connected with the magnetic fluid positioning blocks in a sliding mode; a linear driving mechanism is constructed on the top surface of the mounting seat, the pressing mechanism is connected with the driving end of the linear driving mechanism, and the linear driving mechanism is used for controlling the pressing mechanism to be close to or away from the abutting mechanism; the problems of rapid and automatic positioning and clamping of weak-rigidity and easily-deformed parts are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece clamping, in particular to a flexible fixture for parts based on magnetorheological fluid. Background Art

[0002] Various industries and sectors are increasingly prioritizing the flexible development of manufacturing systems. To achieve this flexibility, fixtures and workholdings must be environmentally friendly, have low energy consumption, provide accurate positioning, and enable rapid clamping with reliable clamping force. Magnetorheological fluid (MRF) technology, which has emerged in recent years, offers these characteristics: fast response, reversibility, low energy consumption, and ease of control. Currently, the use of MRF in fixtures is primarily reflected in industrial robot grippers for material handling, but its application in fixtures and workholdings is relatively limited.

[0003] Among them, the structure of the magnetorheological flexible clamp was studied. The existing technology only designed a magnetorheological damping pin as a positioning element, and the clamping part adopted a pneumatic device. The pneumatic transmission cannot achieve smooth transmission, the positioning accuracy is not high, and automatic clamping cannot be achieved, that is, true flexibility cannot be achieved. Utility Model Content

[0004] The purpose of the utility model is to provide a flexible fixture for parts based on magnetorheological fluid, which solves the problem of rapid automatic positioning and clamping of weak rigidity and easily deformable parts.

[0005] In order to solve the above problems, the present invention adopts the following technical means:

[0006] A flexible fixture for parts based on magnetorheological fluid, comprising:

[0007] The mounting seat has an abutment mechanism positioned on the top surface and a pressing mechanism slidably mounted thereon;

[0008] A magnetic fluid positioning block is installed on each of the sides of the abutting mechanism and the pressing mechanism facing each other, and a plurality of positioning rods are distributed on each of the sides of the two magnetic fluid positioning blocks facing each other, one end of the positioning rod extends into the magnetic fluid deformation cavity of the magnetic fluid positioning block, and the positioning rod is slidably connected to the magnetic fluid positioning block;

[0009] A linear drive mechanism is constructed on the top surface of the mounting seat, the pressing mechanism is connected to the driving end of the linear drive mechanism, and the linear drive mechanism is used to control the pressing mechanism to be close to or away from the abutting mechanism.

[0010] Preferably, a plurality of positioning holes are formed on one side of the positioning rod extending into the magnetic fluid deformation cavity, and the positioning holes are used for the flowing material in the magnetic fluid deformation cavity to flow in.

[0011] Furthermore, the linear drive mechanism includes a pair of limit bars constructed on the top surface of the mounting seat, the limit bars are arranged perpendicular to the abutment mechanism, and a screw rod parallel to the limit bars is constructed between the two limit bars. The screw rod is threadedly connected to the clamping mechanism, and the lower end of the clamping mechanism is slidably embedded in the limit bar.

[0012] Furthermore, the pressing mechanism includes a slider slidably arranged on the limiting bar, the screw is threadedly connected to the slider, and the magnetic fluid positioning block is installed on a side of the slider facing the abutting mechanism.

[0013] Furthermore, a force feedback sensor is provided between the abutting mechanism and the pressing mechanism, and the force feedback sensor is used to measure the holding force between the abutting mechanism and the pressing mechanism.

[0014] Furthermore, the abutting mechanism includes a fixing block fixedly mounted on the top surface of the mounting seat, and the magnetic fluid positioning block is mounted on a side of the fixing block facing the pressing mechanism.

[0015] During use, the utility model has the following beneficial effects:

[0016] The invention utilizes movable positioning rods. During the process of the abutment mechanism and the pressing mechanism moving toward each other, when the workpiece to be clamped abuts the positioning rods, the positioning rods in contact with the workpiece can be retracted into the magnetic fluid deformation cavity. During the clamping process, the clamping portion formed by the plurality of positioning rods conforms to the workpiece's shape. After the abutment mechanism and the pressing mechanism have completed their movement toward each other, the magnetic fluid switch of the magnetic fluid positioning block is activated, allowing the magnetic fluid in the magnetic fluid deformation cavity to be shaped, thereby fixing the position of the positioning rods. This allows the clamping end formed by the plurality of positioning rods between the pressing mechanism and the abutment mechanism to form a shape that matches the outer wall of the workpiece. This allows for stable clamping of weak and easily deformable materials. Furthermore, during the process of the positioning rods and the workpiece forming the clamping end, deformation of the easily deformable workpiece, which could affect its quality, can be effectively avoided. The invention is applicable to the entire field of mechanical clamps, particularly to the clamping of thin-walled, easily deformable, irregularly shaped, and difficult-to-position parts in machining and mechanical measurement. It also features relatively low manufacturing costs and a high degree of intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model.

[0018] Figure 2 This is a structural diagram of the abutment mechanism of the present utility model.

[0019] Figure 3 This is a schematic diagram of the positioning hole structure of the utility model.

[0020] Among them, 100-mounting seat, 200-abutment mechanism, 300-pressing mechanism, 400-magnetic fluid positioning block, 500-positioning rod, 600-linear drive mechanism, 610-limiting bar, 620-screw, 700-positioning hole. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0025] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] Please refer to Figures 1 to 3 As shown, a flexible fixture for parts based on magnetorheological fluid includes:

[0028] The mounting base 100 has an abutment mechanism 200 positioned on the top surface and a pressing mechanism 300 slidably mounted thereon;

[0029] A magnetic fluid positioning block 400 is installed on the side facing the abutting mechanism 200 and the pressing mechanism 300, and a plurality of positioning rods 500 are distributed on the side facing each other of the two magnetic fluid positioning blocks 400. One end of the positioning rod 500 extends into the magnetic fluid deformation cavity of the magnetic fluid positioning block 400, and the positioning rod 500 is slidably connected to the magnetic fluid positioning block 400.

[0030] A linear drive mechanism 600 is constructed on the top surface of the mounting seat 100 . The pressing mechanism 300 is connected to the driving end of the linear drive mechanism 600 . The linear drive mechanism 600 is used to control the pressing mechanism 300 to be close to or away from the abutting mechanism 200 .

[0031] In this way, by using the movable positioning rod 500, when the abutting mechanism 200 and the pressing mechanism 300 move toward each other, when the workpiece to be clamped abuts the positioning rod 500, the positioning rod 500 in contact with the workpiece can be retracted into the magnetic fluid deformation cavity, thereby allowing the clamping portion formed by the plurality of positioning rods 500 to conform to the shape of the workpiece during the clamping process. After the abutting mechanism 200 and the pressing mechanism 300 move toward each other, the magnetic fluid switch of the magnetic fluid positioning block 400 is turned on, allowing the magnetic fluid in the magnetic fluid deformation cavity to be shaped, thereby fixing the position of the positioning rod 500, and allowing the clamping end formed by the plurality of positioning rods 500 between the pressing mechanism 300 and the abutting mechanism 200 to form a shape that matches the outer wall of the workpiece. This can, on the one hand, stably clamp materials with weak rigidity and easy deformation, and, in the process of allowing the positioning rod 500 to cooperate with the workpiece to form the clamping end, effectively prevent the easily deformable workpiece from deforming and affecting the quality of the workpiece. It is applicable to the entire scope of mechanical fixtures, especially the clamping problems of thin-walled, easily deformed, irregularly shaped and difficult-to-position parts in mechanical processing and mechanical measurement. It has relatively low manufacturing costs and a high degree of intelligence.

[0032] Specifically, for the positioning rod 500, a plurality of positioning holes 700 are configured on one side of the positioning rod 500 extending into the magnetic fluid deformation cavity. The positioning holes 700 are used for the flowing material in the magnetic fluid deformation cavity to flow in.

[0033] In this way, during the movement stage of the positioning rod 500, the unmagnetized magnetic fluid can pass through the positioning hole 700 normally, thereby not affecting the normal movement of the positioning rod 500. After the magnetic fluid is magnetized, the position of the positioning rod 500 can be positioned by using the magnetic fluid flowing into the positioning hole 700, thereby avoiding the movement of the positioning rod 500 during the clamping process of the workpiece.

[0034] Furthermore, the linear drive mechanism 600 includes a pair of limit bars 610 constructed on the top surface of the mounting seat 100. The limit bars 610 are arranged perpendicular to the abutment mechanism 200. A screw 620 parallel to the limit bars 610 is constructed between the two limit bars 610. The screw 620 is threadedly connected to the clamping mechanism 300, and the lower end of the clamping mechanism 300 is slidably embedded in the limit bar 610.

[0035] The linear drive mechanism 600 is used to move the pressing mechanism 300 toward or away from the abutting mechanism 200, thereby clamping and loosening the workpiece.

[0036] Specifically, in order to ensure accurate and smooth control of the clamping mechanism 300, the movement of the clamping mechanism 300 is driven by rotating the screw rod 620, and a pair of limit bars 610 are used to prevent the clamping mechanism 300 from shaking or rotating with the threaded rod.

[0037] Furthermore, the pressing mechanism 300 includes a slider slidably arranged on the limiting bar 610 , the screw 620 is threadedly connected to the slider, and the magnetic fluid positioning block 400 is installed on a side of the slider facing the abutting mechanism 200 .

[0038] In addition, a force feedback sensor is provided between the abutting mechanism 200 and the pressing mechanism 300 , and the force feedback sensor is used to measure the holding force between the abutting mechanism 200 and the pressing mechanism 300 .

[0039] At the same time, the abutting mechanism 200 includes a fixing block fixedly mounted on the top surface of the mounting seat 100 , and the magnetic fluid positioning block 400 is mounted on a side of the fixing block facing the pressing mechanism 300 .

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flexible fixture for parts based on magnetorheological fluid, characterized in that: include: A mounting seat (100), a top surface of which is positioned and mounted with an abutment mechanism (200) and a slidably mounted with a pressing mechanism (300); A magnetic fluid positioning block (400) is installed on one side of the abutting mechanism (200) and the pressing mechanism (300) facing each other, and a plurality of positioning rods (500) are distributed on one side of the two magnetic fluid positioning blocks (400) facing each other, one end of the positioning rod (500) extends into the magnetic fluid deformation cavity of the magnetic fluid positioning block (400), and the positioning rod (500) is slidably connected to the magnetic fluid positioning block (400); The top surface of the mounting seat (100) is configured with a linear drive mechanism (600), the pressing mechanism (300) is connected to a driving end of the linear drive mechanism (600), and the linear drive mechanism (600) is used to control the pressing mechanism (300) to be positioned close to or away from the abutting mechanism (200).

2. A flexible fixture for parts based on magnetorheological fluid according to claim 1, characterized in that: A plurality of positioning holes (700) are formed on one side of the positioning rod (500) extending into the magnetic fluid deformation cavity. The positioning holes (700) are used for the flow material in the magnetic fluid deformation cavity to flow in.

3. The flexible fixture for parts based on magnetorheological fluid according to claim 1, characterized in that: The linear drive mechanism (600) includes a pair of limit bars (610) constructed on the top surface of the mounting seat (100), the limit bars (610) are arranged perpendicular to the abutment mechanism (200), and a screw rod (620) parallel to the limit bars (610) is constructed between the two limit bars (610), the screw rod (620) is threadedly connected to the clamping mechanism (300), and the lower end of the clamping mechanism (300) is slidably embedded in the limit bar (610).

4. A flexible fixture for parts based on magnetorheological fluid according to claim 3, characterized in that: The pressing mechanism (300) comprises a slider slidably arranged on the limiting strip (610), the screw (620) is threadedly connected to the slider, and the magnetic fluid positioning block (400) is installed on a side of the slider facing the abutting mechanism (200).

5. The flexible fixture for parts based on magnetorheological fluid according to claim 1, characterized in that: A force feedback sensor is provided between the abutting mechanism (200) and the pressing mechanism (300), and the force feedback sensor is used to measure the holding force between the abutting mechanism (200) and the pressing mechanism (300).

6. The flexible fixture for parts based on magnetorheological fluid according to claim 1, characterized in that: The abutting mechanism (200) comprises a fixing block fixedly mounted on the top surface of the mounting seat (100), and the magnetic fluid positioning block (400) is mounted on a side of the fixing block facing the pressing mechanism (300).

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