A pre-loaded spherical floating clamping head

Abstract

The present invention provides a pre-stressed spherical floating clamping head, comprising a clamping body, a center clamping unit is installed at the center of one end face of the clamping body, and a plurality of evenly distributed side clamping units are installed around the center clamping unit; a center spherical surface entering the clamping body is installed at the other end of the clamping body, a floating support plate is provided between the center spherical surface and the center clamping unit, and a spherical groove matching the center spherical surface is processed on the side of the floating support plate close to the center spherical surface; a pre-tightening disc spring group is provided on the center clamping unit, and a side pre-tightening spring is installed on the side clamping unit, and the side pre-tightening spring pushes the side ball mill of the side push rod to connect with the limiting surface of the floating support plate. The clamping head disclosed by the present invention can ensure that the center line of the silicon rod coincides with the center line of the clamping head, thereby ensuring the grinding accuracy of the silicon rod.

Description

Technical Field

[0001] The invention relates to the technical field of silicon rod clamping, in particular to a clamping head for axially clamping a silicon rod, and more particularly to a pre-pressed spherical floating clamping head. Background Art

[0002] The clamping head is used to clamp the workpiece axially when grinding it. Before clamping, the workpiece is transported to the clamping station by the automatic centering device, and the workpiece can only be ground after being clamped by the clamping heads at both ends. Since there can be a 2mm difference in inclination at both ends of the workpiece, when the workpiece is clamped, when the centering device is released, the workpiece will always change slightly, thereby destroying the original positioning accuracy. In addition, the three clamping points on the left and right clamping heads are unevenly stressed, and the workpiece will also produce slight fluctuations during grinding, affecting the quality and accuracy of grinding. Summary of the invention

[0003] In view of the above technical problems, a pre-loaded spherical floating clamping head is provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A pre-stressed spherical floating clamping head comprises a clamping body, a central clamping unit is installed at the center of one end surface of the clamping body, and a plurality of evenly distributed side clamping units are installed around the central clamping unit;

[0006] The center clamping unit includes a center guide sleeve with one end inserted into the clamping body, and the other end of the center guide sleeve is fixedly connected to the end face of the clamping body through a cover and a bolt, one end of the center push rod is inserted into the center guide sleeve, and the center guide sleeve is processed with a center through hole matching this end of the center push rod at one end in the clamping body, and the part of the center push rod in the center guide sleeve is processed with a shoulder protrusion in contact with the cover, and a preload disc spring group sleeved on the center push rod is provided between the shoulder protrusion and the outer edge of the center through hole;

[0007] A central spherical surface entering the clamping body is fixedly installed at one end of the clamping body away from the central clamping unit, a floating support plate is provided between the central spherical surface and the central clamping unit, and a spherical groove matching the central spherical surface is processed on the side of the floating support plate close to the central spherical surface, and the central spherical surface is arranged in the spherical groove, and the outer edge of the spherical groove is processed with limiting surfaces whose number matches the number of the edge clamping units;

[0008] The edge clamping unit includes an edge guide sleeve with one end inserted into the clamping body, and the other end of the edge guide sleeve is fixedly connected to the clamping body, one end of the edge push rod passes through the edge guide sleeve, and this end of the edge push rod is processed with an edge spherical surface, the edge spherical surface is in contact with the limiting surface, and an edge preload spring sleeved on the edge push rod is provided between the side of the edge spherical surface away from the limiting surface and the outer edge of one end of the edge guide sleeve in the clamping body, and the other end of the edge push rod is arranged outside the clamping body.

[0009] The distance between one end of the central push rod outside the clamping body and the clamping body is greater than the distance between one end of the side push rod outside the clamping body and the clamping body, which is about 2 mm.

[0010] The central push rod and the side push rod are both fixed with clamping nails at one end outside the clamping body.

[0011] A floating gap is arranged between the floating support plate and the central guide sleeve.

[0012] In use: Since the center push rod is higher than the side push rod, it first contacts the center of the silicon rod, which is a pre-clamping state. The purpose is to ensure that the original positioning state of the workpiece is not destroyed. Then the clamping head continues to move toward the silicon rod, and the center push rod contracts away from the silicon rod under the action of force. At this time, the side push rod contacts the end face of the silicon rod to achieve complete clamping.

[0013] In the present invention, the end of the edge push rod away from the silicon rod is a spherical edge surface, and the spherical edge surface generates a force on the limiting surface. Then, the spherical groove connected to the limiting surface rotates at a small angle under the action of the force. Although the end face of the silicon rod has an inclination difference angle of about 2 mm, it will not affect the clamping of the silicon rod by the chuck, and can ensure that the center line of the silicon rod coincides with the center line of the chuck.

[0014] Based on the above reasons, the present invention can be widely promoted in the fields of silicon rod clamping and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a left view of a pre-loaded spherical floating clamping head in a specific implementation manner of the present invention.

[0017] Figure 2 for Figure 1AA section view.

[0018] In the figure: 1. Clamping body; 2. Center clamping unit; 21. Center guide sleeve; 22. Cover; 23. Center push rod; 24. Center through hole; 25. Shoulder protrusion; 26. Preload disc spring assembly; 3. Edge clamping unit; 31. Edge guide sleeve; 32. Edge push rod; 33. Edge spherical surface; 34. Edge preload spring; 35. Clamping pin; 4. Center spherical surface; 5. Floating support plate; 51. Limiting surface; 6. Floating gap. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0023] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0024] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0025] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0026] like Figures 1-2As shown, a pre-stressed spherical floating clamping head comprises a clamping body 1, a central clamping unit 2 is installed at the center of one end surface of the clamping body 1, and three evenly distributed side clamping units 3 are installed around the central clamping unit 2;

[0027] The center clamping unit 2 includes a center guide sleeve 21 with one end inserted into the clamping body 1, and the other end of the center guide sleeve 21 is fixedly connected to the end face of the clamping body 1 through a cover 22 and bolts, one end of a center push rod 23 is inserted into the center guide sleeve 21, and one end of the center guide sleeve 21 in the clamping body 1 is processed with a center through hole 24 matching this end of the center push rod 23, and the part of the center push rod 23 in the center guide sleeve 21 is processed with a shoulder protrusion 25 in contact with the cover 22, and a preload disc spring group 26 sleeved on the center push rod 23 is provided between the shoulder protrusion 25 and the outer edge of the center through hole 24;

[0028] A central spherical surface 4 entering into the clamping body 1 is fixedly mounted on one end of the clamping body 1 away from the central clamping unit 2, and the end of the central spherical surface 4 away from the clamping body is used to be fixedly connected to a motion mechanism that drives the movement of the pre-stressed spherical floating clamping head, and a floating support plate 5 is provided between the central spherical surface 4 and the central clamping unit 2, and the floating support plate 5 is processed with a spherical groove matching the central spherical surface 4 on a side close to the central spherical surface 4, and the central spherical surface 4 is arranged in the spherical groove, and the outer edge of the spherical groove is processed with a limiting surface 51 whose number matches the number of the edge clamping units 3;

[0029] The edge clamping unit 3 includes an edge guide sleeve 31 with one end inserted into the clamping body 1, and the other end of the edge guide sleeve 31 is fixedly connected to the clamping body 1, one end of the edge push rod 32 passes through the edge guide sleeve 31, and this end of the edge push rod 32 is processed with an edge spherical surface 33, the edge spherical surface 33 is in contact with the limiting surface 51, and an edge preload spring 34 mounted on the edge push rod 32 is provided between the side of the edge spherical surface 33 away from the limiting surface 51 and the outer edge of one end of the edge guide sleeve 31 in the clamping body 1, and the other end of the edge push rod 32 is arranged outside the clamping body 1.

[0030] The distance between the end of the central push rod 23 outside the clamping body 1 and the clamping body 1 is greater than the distance between the end of the side push rod 32 outside the clamping body 1 and the clamping body 1, which is about 2 mm.

[0031] The central push rod 23 and the side push rod 32 are both fixed with clamping nails 35 at one end outside the clamping body 1 .

[0032] A floating gap 6 is provided between the floating support plate 5 and the central guide sleeve 21 .

[0033] The floating support plate 5 is clamped on the central spherical surface 4 under the action of the plurality of edge preload springs 34 pushing the edge spherical surface 33 .

[0034] 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A preloaded spherical floating clamping head, characterized in that: It comprises a clamping body, a central clamping unit is installed at the center of one end surface of the clamping body, and a plurality of evenly distributed side clamping units are installed around the central clamping unit; The center clamping unit includes a center guide sleeve with one end inserted into the clamping body, and the other end of the center guide sleeve is fixedly connected to the end face of the clamping body through a cover and a bolt, one end of the center push rod is inserted into the center guide sleeve, and the center guide sleeve is processed with a center through hole matching this end of the center push rod at one end in the clamping body, and the part of the center push rod in the center guide sleeve is processed with a shoulder protrusion in contact with the cover, and a preload disc spring group sleeved on the center push rod is provided between the shoulder protrusion and the outer edge of the center through hole; A central spherical surface entering the clamping body is fixedly installed at one end of the clamping body away from the central clamping unit, a floating support plate is provided between the central spherical surface and the central clamping unit, and a spherical groove matching the central spherical surface is processed on a side of the floating support plate close to the central spherical surface, and the central spherical surface is arranged in the spherical groove, and a limiting surface matching the number of the edge clamping units is processed on the outer edge of the spherical groove; The edge clamping unit includes an edge guide sleeve with one end inserted into the clamping body, and the other end of the edge guide sleeve is fixedly connected to the clamping body, one end of the edge push rod passes through the edge guide sleeve, and this end of the edge push rod is processed with an edge spherical surface, the edge spherical surface is in contact with the limit surface, and an edge preload spring sleeved on the edge push rod is provided between the side of the edge spherical surface away from the limit surface and the outer edge of one end of the edge guide sleeve in the clamping body, and the other end of the edge push rod is arranged outside the clamping body; The central push rod and the side push rod are both fixed with clamping nails at one end outside the clamping body; A floating gap is arranged between the floating support plate and the central guide sleeve.

2. A preloaded spherical floating clamping head according to claim 1, characterized in that: The distance between one end of the central push rod outside the clamping body and the clamping body is greater than the distance between one end of the side push rod outside the clamping body and the clamping body.

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