Tooling fixture base clamping device and clamping method

Abstract

This invention discloses a tooling fixture base clamping device and method. The tooling fixture base clamping device includes a clamping platform, two sets of connecting components, two clamping assemblies, and two adjustment mechanisms. The clamping platform is used to fix the tooling fixture. The two clamping assemblies are symmetrically arranged on both sides of the clamping platform through the two sets of connecting components. The clamping assemblies are used to connect to the machine tool platform. The two adjustment mechanisms are respectively arranged between each set of connecting components to adjust the spacing between the clamping assemblies. This invention has a simple structure and can achieve rapid clamping of the tooling to the machine tool platform without bolt fastening. It effectively solves the shortcomings of small-batch, heavy-duty machining, and the inability to move customized tooling, as well as its limited application range, thereby improving workpiece machining efficiency.

Description

Technical Field

[0001] This invention belongs to the field of tooling clamping technology, and particularly relates to a tooling fixture base clamping device and clamping method. Background Technology

[0002] For batch processing of parts, custom-made special tooling fixtures are generally used for clamping. The alignment accuracy and clamping efficiency of the workpiece are very high. Once the tooling fixture is installed, it is not moved. The tooling fixture is usually fixed to the platform with bolts. For small batch and heavy processing of parts, due to their small quantity and diverse shapes, the custom tooling fixtures have disadvantages such as being immobile and having a limited range of applications, which prevents them from being widely used in non-batch processing.

[0003] In the existing technology, the commonly used workpiece clamping methods are T-bolts, jacks, and pressure plates. This method has low alignment accuracy and low clamping efficiency. Workers have to repeatedly align the workpiece, which is time-consuming and laborious, thus seriously affecting the processing efficiency. Alternatively, the workpiece can be connected to the T-slot on the machine tool platform by means of a fixture. However, the space in the T-slot on the machine tool platform is relatively small, making it inconvenient to put the fixture on or take off. At the same time, the fixture is not firmly fixed in the T-slot and can easily move during the processing, which seriously affects the workpiece accuracy. Summary of the Invention

[0004] To at least partially solve the technical problems existing in the prior art, the present invention provides a tooling fixture base clamping device and clamping method.

[0005] The tooling fixture base clamping device of the present invention includes a clamping platform, two sets of connecting components, two sets of clamping assemblies, and two adjustment mechanisms. The clamping platform is used to fix the tooling fixture. The two sets of clamping assemblies are symmetrically arranged on both sides of the clamping platform through the two sets of connecting components. The clamping assemblies are used to connect to a machine tool platform. The two adjustment mechanisms are respectively arranged between each set of connecting components to adjust the spacing between the clamping assemblies.

[0006] The connecting assembly includes a connecting platform, a connecting plate, a connecting hinge, a limiting component, and a connecting nut. One end of the connecting plate is rotatably mounted on the connecting platform, and the connecting hinge is rotatably mounted on the other end of the connecting plate for connection with the clamping platform. The limiting component is located on one side of the connecting platform for limiting and fixing with the clamping component. The connecting nut is located on the upper outer side of the connecting platform for connection with the adjusting mechanism.

[0007] Furthermore, in the above-mentioned tooling fixture base clamping device, the clamping platform is rectangular in shape, and the connecting hinge is welded to the clamping platform.

[0008] Furthermore, in the above-mentioned tooling fixture base clamping device, a through hole is provided in the middle of the connecting platform.

[0009] Furthermore, in the above-mentioned tooling fixture base clamping device, each set of clamping components includes two clamping connecting platforms, the two clamping connecting platforms are symmetrically arranged, the clamping connecting platforms are matched with the through hole, the clamping connecting platforms pass through the through hole and are limited and fixed by the limiting component, and the bottom of the clamping connecting platform is provided with a connecting gripper.

[0010] Furthermore, in the above-mentioned tooling fixture base clamping device, the connecting gripper is arranged in an L-shape.

[0011] Furthermore, in the above-mentioned tooling fixture base clamping device, the adjustment mechanism includes a bidirectional spiral rod and a handwheel. The length of the bidirectional spiral rod is longer than the distance between the two clamping connecting platforms. Both ends of the bidirectional spiral rod are threadedly engaged with the connecting nuts. The handwheel is fixedly connected to the end of the bidirectional spiral rod near the outside of the machine tool by bolts.

[0012] The tooling fixture base clamping method of the present invention includes:

[0013] Place a clamping platform with fixed fixtures on the machine tool platform according to the position of the workpiece to be processed, and make fine adjustments to the clamping platform so that the clamping components on both sides of the clamping platform correspond to the T-slots on the machine tool platform.

[0014] Release the limiting component to allow the clamping component to move up and down within the connecting table. Place the clamping component into the T-slots on both sides of the machine tool platform of the clamping platform, and ensure that the bottom of the clamping component abuts against the bottom of the T-slot.

[0015] At this point, the distance between each clamping component is adjusted by the adjustment mechanism until the adjustment mechanism can no longer make adjustments. At the same time, the clamping components are limited by the limiting components to complete the clamping.

[0016] The tooling fixture base clamping device and clamping method of the present invention have the following advantages and beneficial effects:

[0017] This invention has a simple structure. By cooperating with the connecting component and the clamping component, the tooling can be quickly clamped to the machine tool platform without bolt fastening. This effectively solves the shortcomings of small batches of heavy workpieces, such as the inability of customized tooling to move and the limited range of use, thereby improving workpiece processing efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0019] Figure 1 This is a three-dimensional structural diagram of the tooling fixture base clamping device of the present invention;

[0020] Figure 2 This is a front view of the tooling fixture base clamping device of the present invention;

[0021] Figure 3 This is a top view of the tooling fixture base clamping device of the present invention;

[0022] Figure 4 This is a schematic diagram of the force analysis of the tooling fixture base clamping device of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100: Machine tool platform; 200: T-slot;

[0025] 1: Clamping platform;

[0026] 2: Connecting component; 21: Connecting platform; 211: Through hole; 22: Connecting plate; 23: Connecting hinge; 24: Limiting component; 25: Connecting nut;

[0027] 3: Clamping assembly; 31: Clamping connection table; 311: Connection gripper;

[0028] 4: Adjustment mechanism; 41: Bidirectional screw rod; 42: Handwheel. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0030] like Figures 1 to 3 As shown, the tooling fixture base clamping device of the present invention includes a clamping platform 1, two sets of connecting components 2, two sets of clamping assemblies 3, and two adjusting mechanisms 4. The clamping platform 1 is used to fix the tooling fixture. The two sets of clamping assemblies 3 are symmetrically arranged on both sides of the clamping platform 1 through the two sets of connecting components 2. The clamping assemblies 3 are used to connect the machine tool platform 100. The two adjusting mechanisms 4 are respectively arranged between each set of connecting components 2 to adjust the distance between the clamping assemblies 3.

[0031] The connecting assembly 2 includes a connecting platform 21, a connecting plate 22, a connecting hinge 23, a limiting assembly 24, and a connecting nut 25. One end of the connecting plate 22 is rotatably mounted on the connecting platform 21, and the connecting hinge 23 is rotatably mounted on the other end of the connecting plate 22 for connecting to the clamping platform 1. The limiting assembly 24 is located on one side of the connecting platform 21 for limiting and fixing with the clamping assembly 3. The connecting nut 25 is located on the upper outer side of the connecting platform 21 for connecting to the adjusting mechanism 4.

[0032] Furthermore, in the tooling fixture base clamping device of the present invention, the clamping platform 1 is rectangular, and the connecting hinge 23 is welded to the clamping platform 1, thereby connecting the connecting component 2 to the clamping platform 1.

[0033] Furthermore, in the tooling fixture base clamping device of the present invention, a through hole 211 is provided in the middle of the connecting platform 21.

[0034] Furthermore, in the tooling fixture base clamping device of the present invention, each clamping assembly 3 includes two clamping connecting platforms 31, which are symmetrically arranged. The clamping connecting platforms 31 are matched with the through hole 211. The clamping connecting platforms 31 pass through the through hole 211 and are fixed by the limiting component 24. The bottom of the clamping connecting platform 31 is provided with a connecting gripper 311, so that the clamping connecting platform 31 can move up and down on the connecting platform 21 through the through hole 211 and be positioned by the limiting component 24. The limiting component 24 can be a limiting bolt, which passes through one side of the connecting platform 21 and the clamping connecting platform 31 and engages with the other side of the connecting platform 21 by thread.

[0035] Furthermore, in the tooling fixture base clamping device of the present invention, the connecting gripper 311 is arranged in an L-shape, the width of the connecting gripper 311 is equal to the opening width of the T-slot 200, and the bottom width of the T-slot 200 is equal to the width of the two connecting grippers 311, so that the connecting gripper 311 and the T-slot 200 are in concave-convex fit, ensuring that the clamping platform 1 and the machine tool platform 100 are completely fixed.

[0036] Furthermore, in the tooling fixture base clamping device of the present invention, the adjustment mechanism 4 includes a bidirectional spiral rod 41 and a handwheel 42. The length of the bidirectional spiral rod 41 is longer than the distance between the two clamping connecting platforms 31. The two ends of the bidirectional spiral rod 41 are respectively threadedly engaged with the connecting nut 25. The handwheel 42 is fixedly connected to the end of the bidirectional spiral rod 41 near the outside of the machine tool by bolts, so that the two clamping connecting platforms 31 can move relative to each other during the rotation of the handwheel 42, shortening the distance between them.

[0037] The bidirectional helical rod 41 is a double-ended stud with threads at both ends. The threads of the bidirectional helical rod 41 turn in opposite directions, thereby enabling the connecting nut 25 to move closer or further away synchronously. The bidirectional helical rod 41 can be obtained under the following conditions:

[0038] Torque formula for a double-sided screw: T 扭 =F×d / 2×cosα;

[0039] Among them, T 扭 Let F represent the torque, d represent the force applied to the end of the double-ended screw, α represent the diameter of the double-ended screw, and α represent the angle between the double-ended screw and the direction of the thrust.

[0040] Formula for calculating the thrust of a bidirectional screw: F 推 =P×π×d^2 / 4×tanα×η;

[0041] Among them, F 推 denoted by , P represents the pressure, d represents the diameter of the double-headed screw, α represents the cone angle of the double-headed screw, and η represents the mechanical efficiency, with a value ranging from 0 to 1.

[0042] The friction coefficient of the double-sided screw is: the dynamic friction coefficient between the double-sided screw and the connecting nut is 0.1 under lubricated conditions and 0.15 under unlubricated conditions. The smaller the friction coefficient, the greater the thrust.

[0043] Self-locking condition: When the efficiency value exceeds 50%, the double-sided screw rod and the connecting nut do not have the self-locking condition;

[0044] like Figure 4 As shown, through the clamping force test, the minimum clamping forces after the connecting component is connected to the clamping component are F1 and F2. After being subjected to force, the connecting component drives the clamping component to move in two directions, Fx and Fy. Ignoring the losses caused by factors such as deformation of the connecting component and the clamping component, the following results are obtained:

[0045] Fx = F1;

[0046] Fy = μF2;

[0047] Where μ is the coefficient of friction between the workpieces;

[0048] Therefore, the vector can be derived as:

[0049] F 矢 =Fx·Fy;

[0050] Based on the torque, thrust, pressure in the direction of movement, vector, and with an appropriate safety factor, the force and moment of the double-sided screw can be calculated, and the appropriate thread parameters can be selected by referring to the table.

[0051] The working principle is as follows:

[0052] The handwheel 42 is rotated to drive the bidirectional screw rod 41 to rotate, causing the threaded connecting nuts 25 on both ends of the bidirectional screw rod 41 to move relative to each other. During the movement of the connecting nuts 25, the connecting gripper 311 at the bottom of the clamping connecting table 31 moves toward the inner wall of the T-slot 200. At the same time, as the distance between the connecting table 21 and the connecting hinge ear 23 shortens, the hinge point between the connecting plate 22 and the connecting table 21 rotates around the hinge point between the connecting plate 22 and the connecting hinge ear 23, generating an upward pulling force. This causes the connecting gripper 311 to move upward and lock with the T-slot 200 while moving toward the inner wall of the T-slot 200.

[0053] The tooling fixture base clamping method of the present invention includes:

[0054] According to the position of the workpiece to be processed on the machine tool platform 100, the clamping platform 1 with the tooling is placed and fixed, and the clamping platform 1 is finely adjusted so that the clamping components 3 on both sides of the clamping platform 1 correspond to the T-slots 200 on the machine tool platform 100, thereby ensuring that the tooling can be accurately positioned.

[0055] Release the limiting component 24 to allow the clamping component 3 to move up and down within the connecting table 21, and place the clamping component 3 into the T-slot 200 on the machine tool platform 100 on both sides of the clamping platform 1, ensuring that the bottom of the clamping component 3 abuts against the bottom of the T-slot 200.

[0056] At this time, the handwheel 42 of the adjustment mechanism 4 rotates, driving the bidirectional screw rod 41 to rotate, causing the threaded connecting nuts 25 on both ends of the bidirectional screw rod 41 to move relative to each other. During the movement of the connecting nuts 25, the clamping connecting table 31 moves relative to each other, thereby adjusting the distance between each clamping assembly 3 until the adjustment mechanism 4 can no longer make adjustments. At the same time, the clamping assembly 3 is limited by the limiting assembly 24 to complete the clamping, so that the tooling can be quickly fixed and installed on the machine tool platform 100, effectively improving the processing efficiency.

[0057] After the workpiece is processed, the handwheel 42 can be rotated in the opposite direction to separate the connecting gripper 311 from the T-slot 200, and the limiting component 24 can be released to move the connecting gripper 311 to the flat surface of the platform to complete the dismantling.

[0058] In summary, compared with the prior art, the tooling fixture base clamping device and clamping method of the present invention have the following advantages and beneficial effects: The present invention has a simple structure. Through the cooperation of the connecting component and the clamping component, the tooling can be quickly clamped to the machine tool platform without bolt fastening. This effectively solves the shortcomings of small batch, heavy workpiece processing, custom tooling that cannot be moved and has a limited range of use, thereby improving workpiece processing efficiency.

[0059] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tooling fixture base clamping device, installed in a T-slot on a machine tool platform, characterized in that, The tooling fixture base clamping device includes a clamping platform, two sets of connecting components, two sets of clamping assemblies, and two adjusting mechanisms. The clamping platform is used to fix the tooling fixture. The two sets of clamping assemblies are symmetrically arranged on both sides of the clamping platform. The clamping assemblies are used to connect to the machine tool platform, wherein: The connecting assembly includes a symmetrically arranged connecting platform, connecting plate, connecting hinge, limiting component, and connecting nut. The connecting platform has a through hole in the middle. One end of the connecting plate is rotatably mounted on the connecting platform. The connecting hinge is rotatably mounted on the other end of the connecting plate for connecting to the clamping platform. The limiting component is located on one side of the connecting platform for limiting and fixing with the clamping component. The connecting nut is located on the upper outer side of the connecting platform for connecting to the adjusting mechanism. Each clamping assembly includes two clamping connecting platforms, which are symmetrically arranged. The clamping connecting platforms are matched with the through holes. The clamping connecting platforms pass through the through holes and are limited and fixed by the limiting components. A connecting gripper is provided at the bottom of the clamping connecting platform. The connecting gripper is L-shaped; The adjustment mechanism includes a bidirectional spiral rod and a handwheel. The length of the bidirectional spiral rod is longer than the distance between the two clamping connecting tables. Both ends of the bidirectional spiral rod are threadedly engaged with the connecting nuts. The handwheel is fixedly connected to the end of the bidirectional spiral rod near the outside of the machine tool by bolts.

2. The tooling fixture base clamping device according to claim 1, characterized in that, The clamping platform is rectangular in shape, and the connecting hinge is welded to the clamping platform.

3. A clamping method using the tooling fixture base clamping device according to any one of claims 1 to 2, characterized in that, The clamping method for the tooling fixture base includes: Place a clamping platform with fixed fixtures on the machine tool platform according to the position of the workpiece to be processed, and make fine adjustments to the clamping platform so that the clamping components on both sides of the clamping platform correspond to the T-slots on the machine tool platform. Release the limiting component to allow the clamping component to move up and down within the connecting table. Place the clamping component into the T-slots on both sides of the machine tool platform of the clamping platform, and ensure that the bottom of the clamping component abuts against the bottom of the T-slot. At this point, the distance between each clamping component is adjusted by the adjustment mechanism until the adjustment mechanism can no longer make adjustments. At the same time, the clamping components are limited by the limiting components to complete the clamping.

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