Tool clamp base clamping device and clamping method

Abstract

The invention discloses a tool clamp base clamping device and method.The tool clamp base clamping device comprises a clamping platform, two connecting assemblies, two sets of clamping assemblies and two adjusting mechanisms, the clamping platform is used for fixing a tool clamp, and the two sets of clamping assemblies are symmetrically arranged on the two sides of the clamping platform through the two connecting assemblies; the clamping assemblies are used for being connected with a machine tool platform, and the two adjusting mechanisms are arranged between the connecting assemblies and used for adjusting the distance between the clamping assemblies. The tool is simple in structure, rapid clamping of the tool and a machine tool platform can be achieved without bolt fastening, the defects that small-batch heavy machined parts and customized tools cannot move, and the use range is small are effectively overcome, and the workpiece machining efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tooling clamping, and in particular relates to a tooling fixture base clamping device and a clamping method. Background Art

[0002] For batch processing parts, customized special fixtures are generally used for clamping. The alignment accuracy and clamping efficiency of the workpiece are very high. The fixtures will not be moved after installation. The fixtures and platforms are generally fixed with bolts. For small batch and heavy processing parts, due to their small quantity and various shapes, the customized fixtures cannot be moved and have a small range of use, which makes them not widely used in non-batch parts.

[0003] In the prior art, the commonly used workpiece clamping method is the method of T-bolts, jacks, and pressure plates. This method has low alignment accuracy and low clamping efficiency. Workers repeatedly align the workpiece, which is time-consuming and laborious, thus seriously affecting the processing efficiency. Alternatively, the workpiece is connected to the T-slot on the machine tool platform through a fixture. Since the T-slot space on the machine tool platform is relatively narrow, it is not convenient to take and place the fixture. At the same time, the fixture is not firmly fixed in the T-slot and is easily moved during the processing process, which seriously affects the workpiece accuracy. Summary of the invention

[0004] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides a clamping device and a clamping method for a tooling fixture base.

[0005] The fixture base clamping device of the present invention comprises a clamping platform, two groups of connecting components, two groups of clamping components and two adjustment mechanisms, wherein the clamping platform is used to fix the fixture, the two groups of clamping components are symmetrically arranged on both sides of the clamping platform through the two groups of connecting components, the clamping components are used to connect the machine tool platform, and the two adjustment mechanisms are respectively arranged between each group of connecting components to adjust the spacing between the clamping components, wherein:

[0006] The connecting assembly includes a connecting platform, a connecting plate, a connecting hinge ear, a limiting assembly and a connecting nut. One end of the connecting plate can be rotatably set on the connecting platform, and the connecting hinge ear can be rotatably set on the other end of the connecting plate for connecting to the clamping platform. The limiting assembly is set on one side of the connecting platform for limiting and fixing with the clamping assembly. The connecting nut is set on the upper end of the outer side of the connecting platform for connecting to the adjustment mechanism.

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

[0008] Furthermore, in the above-mentioned 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 group of the clamping components includes two clamping connection platforms, the two clamping connection platforms are symmetrically arranged, the clamping connection platforms match the through holes, the clamping connection platforms pass through the through holes and are fixed by the limiting components, and a connecting gripper is arranged at the bottom of the clamping connection platforms.

[0010] Furthermore, in the above-mentioned 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 screw rod and a handwheel, the length of the bidirectional screw rod is longer than the distance between the two clamping connecting platforms, the two ends of the bidirectional screw rod are respectively threadedly engaged with the connecting nut, and the handwheel is fixedly connected to the end of the bidirectional screw rod close to the outside of the machine tool by a bolt.

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

[0013] Place a clamping platform with fixed tooling according to the position of the workpiece to be processed on the machine tool platform, and fine-tune 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 limit assembly, move the clamping assembly up and down in the connecting table, and place the clamping assembly into the T-slots on the machine tool platforms on both sides of the clamping platform, and ensure that the bottom of the clamping assembly abuts against the bottom of the T-slot;

[0015] At this time, the distance between each set of clamping components is adjusted by the adjustment mechanism until the adjustment mechanism cannot be adjusted anymore, and at the same time, the clamping components are limited by the limiting components to complete the clamping.

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

[0017] The present invention has a simple structure. Through the cooperation of the connecting assembly and the clamping assembly, the tooling and the machine tool platform can be quickly clamped without bolt fastening, which effectively solves the shortcomings of small batch and heavy workpieces, the inability to move customized tooling, and the small scope of use, thereby improving the workpiece processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the fixture base clamping device of the present invention;

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

[0021] Figure 3 A top view of the fixture base clamping device of the present invention;

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

[0023] Description of reference numerals:

[0024] 100: machine platform; 200: T-slot;

[0025] 1: Clamping platform;

[0026] 2: connecting assembly, 21: connecting platform, 211: through hole, 22: connecting plate, 23: connecting hinge ear, 24: limiting assembly, 25: connecting nut;

[0027] 3: clamping assembly, 31: clamping connection table, 311: connection gripper;

[0028] 4: adjustment mechanism, 41: bidirectional screw rod, 42: hand wheel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 3 As shown, the fixture base clamping device of the present invention comprises a clamping platform 1, two groups of connecting components 2, two groups of clamping components 3 and two adjustment mechanisms 4, the clamping platform 1 is used to fix the fixture, the two groups of clamping components 3 are symmetrically arranged on both sides of the clamping platform 1 through two groups of connecting components 2, the clamping components 3 are used to connect the machine tool platform 100, and the two adjustment mechanisms 4 are respectively arranged between each group of connecting components 2, and are used to adjust the spacing between the clamping components 3, wherein:

[0031] The connecting component 2 includes a connecting platform 21, a connecting plate 22, a connecting hinge ear 23, a limit assembly 24 and a connecting nut 25. One end of the connecting plate 22 can be rotatably set on the connecting platform 21, and the connecting hinge ear 23 can be rotatably set at the other end of the connecting plate 22 for connecting to the clamping platform 1. The limit assembly 24 is set on one side of the connecting platform 21 for limiting and fixing with the clamping component 3. The connecting nut 25 is set at the upper end of the outer side of the connecting platform 21 for connecting to the adjustment mechanism 4.

[0032] Furthermore, in the fixture base clamping device of the present invention, the clamping platform 1 is arranged in a rectangular shape, and the connecting hinge ear 23 is welded to the clamping platform 1, so that the connecting component 2 is connected to the clamping platform 1.

[0033] Furthermore, in the 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 clamping device of the tooling fixture base of the present invention, each clamping assembly 3 includes two clamping connecting platforms 31, and the two clamping connecting platforms 31 are symmetrically arranged. The clamping connecting platforms 31 match the through hole 211, and the clamping connecting platforms 31 pass through the through hole 211 and are fixed by the limiting assembly 24. A connecting gripper 311 is provided at the bottom of the clamping connecting platform 31, so that the clamping connecting platform 31 can effectively move up and down on the connecting platform 21 through the through hole 211, and be positioned by the limiting assembly 24, wherein the limiting assembly 24 can be a limiting bolt, which passes through one side of the connecting platform 21 and the clamping connecting platform 31 through the limiting bolt, and is threadedly engaged with the other side of the connecting platform 21.

[0035] Furthermore, in the clamping device of the tooling fixture base of the present invention, the connecting gripper 311 is arranged in an L shape, and the width of the connecting gripper 311 is equal to the opening width of the T-slot 200. At the same time, 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 matched with each other, ensuring that the clamping platform 1 and the machine tool platform 100 are completely fixed.

[0036] Furthermore, in the clamping device of the tooling fixture base of the present invention, the adjustment mechanism 4 includes a bidirectional screw rod 41 and a handwheel 42. The length of the bidirectional screw rod 41 is longer than the distance between the two clamping connecting platforms 31. The two ends of the bidirectional screw rod 41 are respectively threadedly engaged with the connecting nut 25. The handwheel 42 is fixedly connected to one end of the bidirectional screw rod 41 close to 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, thereby shortening the distance between them.

[0037] The bidirectional screw rod 41 is a double-ended stud with threads at both ends. The threads of the bidirectional screw rod 41 are in opposite directions, so that the connecting nut 25 can be synchronously approached or moved away. The bidirectional screw rod 41 can be obtained by the following conditions:

[0038] Bidirectional screw torque formula: T 扭 =F×d / 2×cosα;

[0039] Among them, T 扭 represents torque, F represents the force applied to the end of the bidirectional screw rod, d represents the diameter of the bidirectional screw rod, and α represents the angle between the bidirectional screw rod and the thrust direction;

[0040] Bidirectional screw thrust calculation formula: F 推 =P×π×d^2 / 4×tanα×η;

[0041] Among them, F 推 represents thrust, P represents pressure, d represents the diameter of the bidirectional screw rod, α represents the cone angle of the bidirectional screw rod, and η represents the mechanical efficiency, with a value range of 0 to 1;

[0042] The friction coefficient of the bidirectional screw rod is: the dynamic friction coefficient of the bidirectional screw rod and the connecting nut is 0.1 under lubricated conditions and 0.15 under non-lubricated conditions. The smaller the friction coefficient, the greater the thrust;

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

[0044] like Figure 4 As shown in the figure, through the clamping force test, it is found that the minimum clamping force after the connecting component is connected to the clamping component is F1 and F2. After the connecting component is subjected to force, it drives the clamping component to move in the two directions of Fx and Fy. Ignoring the loss of factors such as the deformation of the connecting component and the clamping component, it is obtained that:

[0045] Fx = F1;

[0046] Fy=μF2;

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

[0048] So the vector can be obtained as:

[0049] F 矢 =Fx·Fy;

[0050] According to the torque, thrust, moving direction pressure, vector and appropriate increase of safety factor of the bidirectional screw rod, the force and moment of the bidirectional screw rod can be calculated, and the appropriate thread parameters can be selected by looking up the table.

[0051] The working principle is:

[0052] The bidirectional screw rod 41 is driven to rotate by rotating the hand wheel 42, so that the connecting nuts 25 with threads meshing at both ends of the bidirectional screw rod 41 move relative to each other. During the movement of the connecting nut 25, the connecting gripper 311 clamped at the bottom of the connecting platform 31 is driven to move toward the inner wall of the T-slot 200. At the same time, during the process of shortening the distance between the connecting platform 21 and the connecting hinge ear 23, the hinge point between the connecting plate 22 and the connecting platform 21 rotates around the hinge point between the connecting plate 22 and the connecting hinge ear 23, generating an upward pulling force, so that the connecting gripper 311 moves toward the inner wall of the T-slot 200 and moves upward to lock with the concave and convex of the T-slot 200.

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

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

[0055] Release the limit assembly 24 to allow the clamping assembly 3 to move up and down in the connecting platform 21, and place the clamping assembly 3 into the T-slots 200 on the machine tool platform 100 on both sides of the clamping platform 1, and ensure that the bottom of the clamping assembly 3 abuts against the bottom of the T-slot 200;

[0056] At this time, the handwheel 42 of the adjustment mechanism 4 is rotated to drive the bidirectional screw rod 41 to rotate, so that the connecting nuts 25 with threads meshing at both ends of the bidirectional screw rod 41 move relative to each other. During the movement of the connecting nut 25, the clamping connecting platform 31 is driven to move relative to each other, thereby adjusting the distance between each group of clamping components 3 until the adjustment mechanism 4 can no longer be adjusted. At the same time, the clamping component 3 is limited by the limit component 24 to complete the clamping, so that the tooling can be quickly fixed to the machine tool platform 100, effectively improving the processing efficiency.

[0057] After the workpiece is processed, the hand wheel 42 can be rotated in the reverse direction to separate the connecting gripper 311 from the T-slot 200, and the limiting assembly 24 can be released to move the connecting gripper 311 to the upper plane of the platform to complete the removal.

[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, and through the cooperation of the connecting assembly and the clamping assembly, the tooling and the machine tool platform can be quickly clamped without bolt fastening, which effectively solves the shortcomings of small batch, heavy workpieces, customized tooling that cannot be moved, and a small range of use, thereby improving the workpiece processing efficiency.

[0059] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. 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 directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixture base clamping device, installed in a T-slot on a machine tool platform, characterized in that: The fixture base clamping device comprises a clamping platform, two groups of connecting components, two groups of clamping components and two adjustment mechanisms, the clamping platform is used to fix the fixture, the two groups of clamping components are symmetrically arranged on both sides of the clamping platform through the two groups of connecting components, the clamping components are used to connect the machine tool platform, and the two adjustment mechanisms are respectively arranged between each group of connecting components to adjust the spacing between the clamping components, wherein: The connecting assembly includes a connecting platform, a connecting plate, a connecting hinge ear, a limiting assembly and a connecting nut. One end of the connecting plate can be rotatably set on the connecting platform, and the connecting hinge ear can be rotatably set on the other end of the connecting plate for connecting to the clamping platform. The limiting assembly is set on one side of the connecting platform for limiting and fixing with the clamping assembly. The connecting nut is set on the upper end of the outer side of the connecting platform for connecting to the adjustment mechanism.

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

3. The fixture base clamping device according to claim 1, characterized in that: A through hole is arranged in the middle of the connecting platform.

4. The fixture base clamping device according to claim 3, characterized in that: Each group of the clamping components includes two clamping connection platforms, which are symmetrically arranged. The clamping connection platforms match the through holes. The clamping connection platforms pass through the through holes and are fixed by the limiting components. A connecting gripper is arranged at the bottom of the clamping connection platforms.

5. The fixture base clamping device according to claim 4, characterized in that: The connecting gripper is arranged in an L shape.

6. The fixture base clamping device according to claim 4, characterized in that: The adjustment mechanism includes a bidirectional screw rod and a handwheel. The length of the bidirectional screw rod is longer than the distance between the two clamping connection platforms. Both ends of the bidirectional screw rod are respectively threadedly engaged with the connecting nut. The handwheel is fixedly connected to one end of the bidirectional screw rod close to the outside of the machine tool by a bolt.

7. A clamping method implemented by using the fixture base clamping device according to any one of claims 1 to 6, characterized in that: The fixture base clamping method comprises: Place a clamping platform with fixed tooling according to the position of the workpiece to be processed on the machine tool platform, and fine-tune 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 limit assembly, move the clamping assembly up and down in the connecting table, and place the clamping assembly into the T-slots on the machine tool platforms on both sides of the clamping platform, and ensure that the bottom of the clamping assembly abuts against the bottom of the T-slot; At this time, the distance between each set of clamping components is adjusted by the adjustment mechanism until the adjustment mechanism cannot be adjusted anymore, and at the same time, the clamping components are limited by the limiting components to complete the clamping.

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