An adjustable two-way floating clamping device

Abstract

The present invention relates to the technical field of numerical control cutting tools, and specifically to an adjustable bidirectional floating clamping device, comprising a floating base, a sliding connection block, an upper sliding body, an adjusting nut, a basic handle, and a No. 2 top screw; the floating base is fixed on the basic handle by the No. 2 top screw, and an angular floating amount adjustment mechanism and a radial floating amount adjustment mechanism are installed on the floating base; the adjusting nut is threadedly connected to the floating base and clamps a clamping mechanism, a No. 1 thrust bearing assembly, and a No. 2 thrust bearing assembly in the middle, and the clamping mechanism floats between the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly; the adjustable bidirectional floating clamping device can realize the floating of the tool relative to the device when the main shaft runout error of the device is large and the positioning error of each moving axis is large, and the floating amount can be adjusted. Through the floating of the tool, the influence of the equipment error on the reaming process can be eliminated to the greatest extent, thereby ensuring the processing accuracy and improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control cutting tools, and in particular to an adjustable bidirectional floating clamping device. Background Art

[0002] In the process of mechanical processing, as the design of parts becomes more and more complex and the precision of parts becomes higher and higher, the requirements for cutting tools and CNC equipment are also getting higher and higher. In the processing of CNC equipment holes, there are more and more positioning holes, bearing holes, limit holes, guide holes, etc., and the requirements for hole shape accuracy are also getting higher and higher. After a certain period of use, the accuracy of CNC equipment is affected by various factors, causing the various accuracy parameters of the equipment to deteriorate. When the hole accuracy requirements of the parts are high, the quality of the processed holes cannot meet the accuracy requirements or cannot remain stable.

[0003] In particular, the spindle runout accuracy of CNC equipment and the repeated positioning accuracy of each moving axis have deteriorated, which has a great impact on the reaming quality. In actual production, new equipment has to be used, or other processes have to be added to ensure accuracy and stability. For production companies, it will not only increase investment costs, but also affect production efficiency. If the reaming clamping device can be made to float in both radial and angular directions, it will greatly solve the reaming error caused by the poor spindle runout accuracy of CNC equipment and the insufficient repeated positioning accuracy of each moving axis, and at the same time, it can effectively ensure the processing accuracy and efficiency requirements of parts.

[0004] In the existing mechanical reaming process, the equipment spindle runout accuracy error and the positioning accuracy error of each moving axis are large, resulting in large reaming accuracy error, which cannot meet the product accuracy requirements or has unstable quality; the part reaming accuracy cannot be guaranteed, and the problem of the influence of equipment accuracy error on reaming during processing cannot be solved well, resulting in increased costs and reduced production efficiency. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention proposes an adjustable bidirectional floating clamping device.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] An adjustable bidirectional floating clamping device comprises a floating base, a sliding connection block, an upper sliding body, an adjusting nut, a basic handle, and a No. 2 top screw; the floating base is fixed to the basic handle by the No. 2 top screw, and an angular floating amount adjustment mechanism and a radial floating amount adjustment mechanism are installed on the floating base;

[0008] The adjusting nut is threadedly connected to the floating base and clamps the clamping mechanism, the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly in the middle, and the clamping mechanism floats between the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly.

[0009] Preferably, the No. 1 thrust bearing assembly includes an upper sliding body and a No. 2 steel ball, and the No. 2 steel ball is mounted on the upper sliding body.

[0010] Preferably, the No. 2 thrust bearing assembly includes a sliding connection block and a No. 1 steel ball, and the No. 1 steel ball is mounted on the sliding connection block.

[0011] Preferably, the clamping mechanism includes an ER nut and a floating ER threaded base; the floating ER threaded base is installed on the ER nut, a No. 5 O-ring is installed on the left end of the floating ER threaded base, the floating ER threaded base and the ER nut float between the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly, and a stop ring and a No. 4 O-ring are installed between the ER nut and the adjusting nut.

[0012] Preferably, the angular floating amount adjustment mechanism includes an adjusting nut and a No. 1 top screw; the No. 1 top screw is installed on the adjusting nut, the adjusting nut is threadedly connected to the floating base, and clamps the floating ER threaded base, the sliding connection block and the upper sliding body in the middle.

[0013] Preferably, the radial floating amount adjustment mechanism includes a spring, a clamping screw and a plug; the clamping screw is connected to the spring, and a No. 2 O-ring and an elastic opening ring are installed between the right end of the clamping screw and the inside of the floating base, and the spring is connected to the plug. The spring is installed on the catheter, and a No. 1 O-ring is installed between the catheter and the clamping screw, and a No. 3 O-ring is installed between the catheter and the floating ER threaded base.

[0014] Preferably, the No. 1 O-ring, the No. 2 O-ring, the No. 3 O-ring, the No. 4 O-ring and the No. 5 O-ring are all made of polytetrafluoroethylene material.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] The adjustable bidirectional floating clamping device of the present invention can make the tool float relative to the equipment and adjust the floating amount when the main shaft runout error of the equipment is large and the positioning error of each moving axis is large. Through the floating of the tool, the influence of the equipment error on the reaming process can be eliminated to the greatest extent, thereby ensuring the processing accuracy and improving the production efficiency. In the actual floating reaming process, the adjustable bidirectional floating clamping device can improve the processing accuracy and achieve the same efficiency as the traditional clamping system, and can meet the reaming requirements of various equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only for the present invention to protect some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the angular floating amount adjustment mechanism of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the radial floating amount adjustment mechanism of the present invention;

[0021] In the figure: 1-floating base, 2-sliding connection block, 3-floating ER threaded base, 4-conduit, 5-spring, 6-tightening screw plug, 7-plug, 8-No. 1 steel ball, 9-No. 1 O-ring, 10-No. 2 O-ring, 11-No. 3 O-ring, 12-upper sliding body, 13-No. 2 steel ball, 14-adjusting nut, 15-stop ring, 16-No. 4 O-ring, 17-elastic opening ring, 18-base handle, 19-ER nut, 20-No. 1 top screw, 21-No. 2 top screw, 22-No. 5 O-ring. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] An adjustable bidirectional floating clamping device comprises a floating base 1, a sliding connection block 2, an upper sliding body 12, an adjusting nut 14, a basic handle 18, and a second top screw 21; the floating base 1 is fixed to the basic handle 18 by the second top screw 21, and an angular floating amount adjustment mechanism and a radial floating amount adjustment mechanism are installed on the floating base 1;

[0025] The adjusting nut 14 is threadedly connected to the floating base 1 and clamps the clamping mechanism, the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly in the middle, and the clamping mechanism floats between the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly.

[0026] The No. 1 thrust bearing assembly includes an upper sliding body 12 and a No. 2 steel ball 13. The No. 2 steel ball 13 is mounted on the upper sliding body 12 to ensure minimum friction so that the floating will not get stuck.

[0027] The No. 2 thrust bearing assembly includes a sliding connection block 2 and a No. 1 steel ball 8. The No. 1 steel ball 8 is installed on the sliding connection block 2 to ensure minimum friction so that floating will not get stuck.

[0028] The clamping mechanism includes an ER nut 19 and a floating ER threaded base 3; the floating ER threaded base 3 is installed on the ER nut 19, and a No. 5 O-ring 22 is installed on the left end of the floating ER threaded base 3. The floating ER threaded base 3 and the ER nut 19 float between the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly. A stop ring 15 and a No. 4 O-ring 16 are installed between the ER nut 19 and the adjusting nut 14, so that the rotation center of the machining tool and the axis of the pre-machined hole remain coincident, and float relative to the rotation center of the base handle 18 and the equipment spindle.

[0029] The angular floating amount adjustment mechanism includes an adjusting nut 14 and a No. 1 top screw 20; the No. 1 top screw 20 is installed on the adjusting nut 14, the adjusting nut 14 is threadedly connected to the floating base 1, and the floating ER threaded base 3, the sliding connection block 2 and the upper sliding body 12 are clamped in the middle, so as to adjust the thread engagement length to control the gap between the clamping device and the floating base 1. After the adjustment is completed, the adjusting nut can be locked by the No. 1 top screw 20, thereby locking the angular floating amount.

[0030] The radial floating amount adjustment mechanism includes a spring 5, a clamping screw 6 and a plug 7; the clamping screw 6 is connected to the spring 5, and a No. 2 O-ring 10 and an elastic opening ring 17 are installed between the right end of the clamping screw 6 and the inside of the floating base 1. The spring 5 is connected to the plug 7. The spring 5 is installed on the catheter 4, and a No. 1 O-ring 9 is installed between the catheter 4 and the clamping screw 6. A No. 3 O-ring 11 is installed between the catheter 4 and the floating ER threaded base 3, which is convenient for adjusting the thread engagement length to control the gap between the clamping device and the floating base 1. After the adjustment is completed, the adjusting nut can be locked by the No. 1 top screw 20, thereby locking the angular floating amount.

[0031] The No. 1 O-ring 9, the No. 2 O-ring 10, the No. 3 O-ring 11, the No. 4 O-ring 16 and the No. 5 O-ring 22 are all made of polytetrafluoroethylene material. Polytetrafluoroethylene is a polymer compound formed by polymerization of tetrafluoroethylene and has excellent chemical stability, corrosion resistance, sealing, high lubricity and non-stickiness, electrical insulation and good anti-aging resistance.

[0032] The working mode of the adjustable two-way floating clamping device is:

[0033] When there are positioning errors in each motion axis and runout errors in the spindle, the clamping part composed of the threaded connection between the ER nut 19 and the floating ER threaded base 3 and the clamped processing tool are constrained by the pre-processed hole and offset a certain floating amount E from the original rotation center (the rotation center of the basic handle 18) through the sliding connection block 2. The cutting tool is not affected by the positioning accuracy error of the equipment and the runout error of the spindle, and is always consistent with the pre-processed hole.

[0034] The clamping device composed of the ER nut 19 and the floating ER threaded base 3 floats between the thrust bearings composed of the No. 2 steel ball 13 and the upper sliding body 12, and the No. 1 steel ball 8 and the sliding connection block 2, so that the rotation center of the machining tool coincides with the axis of the pre-machined hole and floats relative to the rotation center of the base handle 18 and the main shaft of the equipment. The device of the thrust bearing composed of the No. 1 steel ball 8 and the sliding connection block 2, and the steel ball 13 and the upper sliding body 12, respectively, ensures minimum friction so that the floating will not get stuck.

[0035] The adjusting nut 14 is threadedly connected to the floating base 1. The gap between the ER nut 19, the floating ER thread base 3 and the floating base 1 is controlled by adjusting the thread engagement length. When the gap increases, the angle at which the clamping device can be offset increases. After the adjustment is completed, the adjusting nut can be locked by a No. 1 top screw 20, thereby locking the angular floating amount.

[0036] The compression screw plug 6 pushes the spring 5, so that the spring 5 gives the plug 7 an axial thrust, and the plug 7 compresses the floating ER thread base 3, so that the floating ER thread base 3 is concentric with the base handle 18 without external force. When the compression screw plug 6 is screwed to the bottom, the plug 7 compresses the floating ER thread base 3, and there is no gap between the two, so there is no floating amount, and the radial floating amount is zero at this time. As the spring 5 and the adjusting screw 14 are screwed outward, the gap gradually increases. At this time, the floating amount is proportional to the gap size.

[0037] The nuts, screws, steel balls and O-rings used in this patent are all commercially available, and their structures and control methods are existing technologies and will not be described in detail in the specification.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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. An adjustable bidirectional floating clamping device, comprising a floating base (1), a sliding connection block (2), an upper sliding body (12), an adjusting nut (14), a base handle (18), and a No. 2 top screw (21); characterized in that: The floating base (1) is fixed to the base handle (18) via a No. 2 top screw (21), and an angular floating amount adjustment mechanism and a radial floating amount adjustment mechanism are installed on the floating base (1); The adjusting nut (14) is threadedly connected to the floating base (1) and clamps the clamping mechanism, the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly in the middle, and the clamping mechanism floats between the No. 1 thrust bearing assembly and the No. 2 thrust bearing assembly; The clamping mechanism comprises an ER nut (19) and a floating ER thread base (3); the floating ER thread base (3) is mounted on the ER nut (19); a No. 5 O-ring (22) is mounted on the left end of the floating ER thread base (3); the floating ER thread base (3) and the ER nut (19) float between a No. 1 thrust bearing assembly and a No. 2 thrust bearing assembly; a stop ring (15) and a No. 4 O-ring (16) are mounted between the ER nut (19) and the adjusting nut (14).

2. The adjustable bidirectional floating clamping device according to claim 1 is characterized in that: The No. 1 thrust bearing assembly comprises an upper sliding body (12) and a No. 2 steel ball (13), and the No. 2 steel ball (13) is mounted on the upper sliding body (12).

3. The adjustable bidirectional floating clamping device according to claim 2 is characterized in that: The No. 2 thrust bearing assembly comprises a sliding connection block (2) and a No. 1 steel ball (8), and the No. 1 steel ball (8) is mounted on the sliding connection block (2).

4. The adjustable bidirectional floating clamping device according to claim 3 is characterized in that: The angular floating amount adjustment mechanism comprises an adjusting nut (14) and a No. 1 top screw (20); the No. 1 top screw (20) is installed on the adjusting nut (14), the adjusting nut (14) is threadedly connected to the floating base (1), and clamps the floating ER threaded base (3), the sliding connection block (2) and the upper sliding body (12) in the middle.

5. The adjustable bidirectional floating clamping device according to claim 4 is characterized in that: The radial floating amount adjustment mechanism comprises a spring (5), a clamping screw (6) and a plug (7); the clamping screw (6) is connected to the spring (5), a No. 2 O-ring (10) and an elastic opening ring (17) are installed between the right end of the clamping screw (6) and the inside of the floating base (1), the spring (5) is connected to the plug (7), the spring (5) is installed on the catheter (4), a No. 1 O-ring (9) is installed between the catheter (4) and the clamping screw (6), and a No. 3 O-ring (11) is installed between the catheter (4) and the floating ER threaded base (3).

6. The adjustable bidirectional floating clamping device according to claim 5, characterized in that: The No. 1 O-ring (9), No. 2 O-ring (10), No. 3 O-ring (11), No. 4 O-ring (16) and No. 5 O-ring (22) are all made of polytetrafluoroethylene material.

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