High-strength top pressure type precise elastic clamp

Abstract

The elastic clamp is an integrated T-shaped piece, the top face of a transverse part is arranged to be a clamping end face, the bottom face of the transverse part is arranged to be a clamping and jacking end face, a vertical part of the transverse part is arranged to be a positioning column, a limiting groove is formed in the axis penetrating through the elastic clamp, and the transverse part is cut into a plurality of fan-shaped blocks in the radial direction. The grooving depth of the fan-shaped blocks is flush with the upper surface of the clamping and jacking end. According to the high-strength jacking type precise elastic clamp, the elastic clamp is connected with the linkage rod, the lower clamp body of the clamp is driven to clamp the jacking end face to generate certain interaction force with the end face of the main shaft through the contraction effect of the linkage rod, and eight fan-shaped blocks of the clamp are promoted to evenly contract so as to achieve the effect of clamping parts; the elastic clamp is simple in structure, good in dynamic balance effect, convenient to use, high in positioning precision and high in anti-fatigue capacity, and can really and effectively achieve clamping work on the parts and finish precision machining during precision machining of the annular parts.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ring part machining, and in particular to a high-strength top-pressing type precision elastic clamp. BACKGROUND

[0002] In the field of precision machining of ring parts, the rotating speed of a tool or a part is extremely high, and generally needs to be higher than 3700 rad / min to achieve the purpose of precision turning, which puts forward higher requirements for the concentricity of the shaft center of the fixed part and the rotating center of the main shaft and the repeated positioning accuracy. At present, the industry mainly realizes this through a three-jaw chuck, a plastic steel elastic clamp and a screw type elastic clamp. The three-jaw chuck has poor repeated positioning accuracy and difficult-to-control clamp force, the plastic steel clamp has poor fatigue limit and may cause shaft center deviation or part loosening after repeated use, and the screw type elastic clamp has many internal threads and a complex structure, which leads to poor dynamic balance, and the disassembly and assembly of the part need to be manually screwed back and forth, which is low in efficiency and high in labor intensity of workers. CONTENT OF THE UTILITY MODEL

[0003] To solve or partially solve the problems in the related art, the application provides a high-strength top-pressing type precision elastic clamp, which uniformly shrinks through fan-shaped blocks during precision machining of ring parts to achieve the effect of clamping the part.

[0004] The first aspect of the application provides a high-strength top-pressing type precision elastic clamp. The elastic clamp is a one-piece T-shaped part. The top surface of the horizontal part is provided as a clamping end surface, and the bottom surface is provided as a clamping top-pressing end surface. The vertical part is provided as a positioning column. A limiting groove is formed through the shaft center of the elastic clamp. The horizontal part is cut into a plurality of fan-shaped blocks along the radial direction, and the slotting depth of the fan-shaped blocks is flush with the upper surface of the clamping top-pressing end.

[0005] The limiting groove is a T-shaped groove, and the fixing bolt penetrates the limiting groove and installs the elastic clamp on the linkage rod.

[0006] The clamping end surface is provided with a countersunk groove for fully contacting the part.

[0007] The horizontal part is provided with a dynamic balance detection end surface for detecting the rotational dynamic balance of the elastic clamp.

[0008] The technical scheme provided by the application can include the following beneficial effects:

[0009] The application provides a high-strength top-pressing precision elastic clamp, which is connected with a linkage rod, and through the contraction of the linkage rod, the lower clamp of the clamp is driven to clamp and press the end face and the spindle end face to generate a certain interaction force, so that the eight fan-shaped blocks of the clamp are uniformly contracted to clamp the parts. The elastic clamp has the advantages of simple structure, good dynamic balance effect, convenient use, high positioning precision, strong fatigue resistance, and can effectively clamp the parts and complete precision machining during the precision machining of the annular parts.

[0010] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS

[0011] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and wherein:

[0012] Figure 1 is a front view of the elastic clamp shown in the embodiments of the application;

[0013] Figure 2 is a cross-sectional view of the elastic clamp shown in the embodiments of the application;

[0014] Figure 3 is a connection diagram of the elastic clamp shown in the embodiments of the application;

[0015] Reference signs:

[0016] In the figure, 1 is an elastic clamp, 2 is a fixing bolt, 3 is a washer, 4 is a rotating spindle, 5 is a linkage rod, 11 is an axial positioning column, 12 is a clamping and pressing end face, 13 is a dynamic balance detection end face, 14 is a top support inclined surface, 15 is a countersunk groove, 16 is a fan-shaped block, and 17 is a clamping end face. DETAILED DESCRIPTION

[0017] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0018] It should be understood that, although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0020] Unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] The technical solutions of the embodiments of the present application are described in detail below in combination with the drawings.

[0022] As shown in Figure 1 A high-strength top pressure type precision elastic clamp 1 is integrally formed and annealed to ensure the overall dynamic balance and rigidity of the clamp, and to avoid the influence of the existence of machining residual stress on the clamping and positioning accuracy.

[0023] As shown in Figure 2 The elastic clamp 1 is a T-shaped piece, and a countersunk groove 15 is provided at the top to ensure sufficient contact of the part with the end face of the clamp. The horizontal part of the T-shaped piece is cut radially into a plurality of sector blocks 16, and the clamp has 8 symmetrical sector blocks 16. The slot width of the sector block 16 is 1-1.5mm, and the slot depth is flush with the upper surface of the clamping top pressure end. The side surface of the sector block 16 forms a micro-deformation wall surface, and the wall thickness of the micro-deformation wall surface should be controlled to be 3-5mm, and the wall thickness is the same, so as to ensure that the micro-deformation is moderate and the phenomenon of clamping damage or clamping tightness of the part is avoided.

[0024] A dynamic balance detection end face 13 is provided on the outer side of the transverse part of the T-shaped part. It is used to detect the dynamic balance of the fixture after it is installed and rotated. The fixture can only be used if the circular runout of the fixture is less than 0.02mm when the spindle drives the fixture to rotate.

[0025] The top surface of the T-shaped part is designated as the clamping end face 17. The wall thickness and height of the clamping end face 17 should not be too large to avoid increasing the radial and axial deflection of the fixture, ensuring that the parts can be clamped. The bottom surface of the T-shaped part is designated as the clamping and pressing end face 12. The flatness of the clamping and pressing end face 12 is less than 0.01mm to ensure the consistency and uniformity of the shrinkage and pressing of each sector block. The wall thickness of the clamping and pressing end face 12 should be 4-5mm to ensure that the density of the pressing force is moderate.

[0026] The vertical part of the T-shaped part is set as a central positioning post 11. The cylindricity of the positioning post is less than 0.005mm, and the outer circle dimension has a negative tolerance between -0.03mm and -0.01mm to ensure the positioning accuracy after the fixture is connected to the spindle.

[0027] A limiting groove is formed through the axis of the elastic clamp 1. The limiting groove is used to install the fixing bolt 2. In order to further limit the bolt, the limiting groove is a T-shaped groove. After the fixing bolt 2 passes through the limiting groove, its end abuts against the washer 3 and is locked inside the elastic clamp 1. The bottom of the elastic clamp 1 is installed on the linkage rod 5. The fan-shaped block 16 forms a top support slope 14 on both sides of the bolt for applying the top support reaction force. The slope of the top support slope 14 is preferably 50° to 60° to ensure that the top support is subjected to a moderate top support reaction force.

[0028] like Figure 3 As shown, the clamp is fixed to the rotating spindle 4 by means of the fixing bolt 2 passing through the limiting groove. The concentricity between the clamp and the spindle is achieved by the precise fit between the axial positioning post 11 of the elastic clamp 1 and the inner cylinder of the spindle. The fixing bolt 2 locks the elastic clamp 1 to the hydraulic or pneumatic linkage rod 5 inside the spindle. Through the contraction of the linkage rod 5, the clamping top pressure end face 12 of the elastic clamp 1 and the end face of the spindle generate a certain interaction force, causing the eight sector-shaped blocks 16 of the clamp to contract evenly to achieve the function of clamping the parts.

[0029] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely 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. Furthermore, the terms "include," "contain," or any other variations 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.

[0030] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may also be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0031] The above has described the embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical application or improvement of the technology in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A high-strength top pressing type precision elastic clamp characterized by, The elastic clamp is an integral T-shaped piece, the top surface of the horizontal part is arranged as a clamping end surface, the bottom surface is arranged as a clamping top pressing end surface, the vertical part is arranged as a positioning column, a limiting groove is arranged through the shaft center of the elastic clamp, the horizontal part is cut into a plurality of fan-shaped sub-blocks along the radial direction, and the groove depth of the fan-shaped sub-blocks is flush with the upper surface of the clamping top pressing end.

2. The high-strength top press type precision elastic clamp according to claim 1, wherein The limiting groove is a T-shaped groove, a fixing bolt penetrates through the limiting groove and installs the elastic clamp on a linkage rod.

3. The high-strength top press type precision elastic clamp according to claim 1, wherein The clamping end surface is provided with a countersunk groove for fully contacting the part.

4. The high-strength top press type precision elastic clamp according to claim 1, wherein The horizontal part is provided with a dynamic balance detection end surface for detecting the rotational dynamic balance of the elastic clamp.

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