Floating center frame for external thread grinding machine

Abstract

The floating center frame for the external thread grinding machine comprises a frame body, a first clamping jaw mechanism and a second clamping jaw mechanism, the first clamping jaw mechanism and the second clamping jaw mechanism are arranged on one side of the frame body, and the first clamping jaw mechanism comprises a first clamping jaw hinged to the frame body and a first ejector rod acting on the movable end of the first clamping jaw. The second clamping jaw mechanism comprises a second clamping jaw with one end hinged to the frame body and a second ejector rod used for pushing the other end of the second clamping jaw to swing up and down, the ejector rod mechanism comprises a third ejector rod and a floating ejector block arranged at one end of the third ejector rod, and workpieces of different sizes can be adapted by adjusting the first clamping jaw mechanism, the second clamping jaw mechanism and the ejector rod mechanism; and meanwhile, the first floating pressing plate is in floating connection with the first clamping jaw, the floating ejector block is in floating connection with the third ejector rod, and the second floating pressing plate is in floating connection with the second clamping jaw, so that various complex parts and working conditions can be adapted, and the machining efficiency and the machining precision are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of machining technology, more particularly relates to a floating center stand for external thread grinder. BACKGROUND

[0002] The floating center stand is a device for supporting and positioning rotating workpieces, commonly used in lathes, grinders and other equipment. Currently, long shaft workpieces are prone to deflection and vibration during machining, resulting in a decrease in machining accuracy. Moreover, the existing fixed center stand needs to be frequently adjusted when adapting to workpieces of different diameters, which is complicated to operate. Furthermore, due to its rigid connection method, it cannot adapt to the slight deformation of workpieces caused by cutting force, thermal deformation or self-weight during machining, which easily leads to additional stress on the workpiece, even surface damage or a decrease in machining accuracy, or even damage to the tool. Therefore, there is an urgent need for a floating center stand that can adapt to workpiece deformation and reduce vibration. SUMMARY

[0003] The main purpose of the utility model is to provide a floating center stand for external thread grinder which is simple to operate and can improve machining efficiency and accuracy.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A floating center stand for external thread grinder, comprising a frame body and a first clamping jaw mechanism and a second clamping jaw mechanism arranged on one side of the frame body, a top rod mechanism is arranged between the first clamping jaw mechanism and the second clamping jaw mechanism, the first clamping jaw mechanism comprises a first clamping jaw hinged to the frame body and a first top rod acting on the movable end of the first clamping jaw, a first floating pressing plate is arranged on the movable end of the first clamping jaw, the second clamping jaw mechanism comprises a second clamping jaw hinged to one end of the frame body and a second top rod for pushing the other end of the second clamping jaw to swing up and down, a second floating pressing plate is arranged on the corresponding end of the second clamping jaw and the first floating pressing plate, the top rod mechanism comprises a third top rod and a floating top block arranged on one end of the third top rod, and an active cavity for placing a workpiece is formed between the floating top block, the first floating pressing plate and the second floating pressing plate.

[0006] According to the first aspect of the utility model, the locking mechanism comprises a first locking nut arranged on the second clamping jaw and a second locking nut arranged on the third top rod.

[0007] According to the first aspect of the utility model, the first clamping jaw mechanism further comprises a first adjusting nut for adjusting the reciprocating motion of the first top rod and a first floating pin for connecting the first floating pressing plate and the first clamping jaw.

[0008] According to the first aspect of the utility model, one side of the first floating pressing plate is connected with the first clamping jaw, and the other side of the first floating pressing plate is provided with a first pressing surface capable of contacting the workpiece.

[0009] According to the first aspect of the utility model, a first mounting plate through which the first top rod passes is arranged on the frame body, and one end of the first mounting plate away from the first top rod is hinged to the frame body.

[0010] According to the first aspect of the utility model, the second clamping jaw mechanism further comprises a second adjusting nut for adjusting the reciprocating movement of the second top rod and a second floating pin for connecting the second floating pressing plate and the second clamping jaw.

[0011] According to the first aspect of the utility model, one side of the second floating pressing plate is connected with the second clamping jaw, and the other side of the second floating pressing plate is provided with a second pressing surface capable of contacting the workpiece.

[0012] According to the first aspect of the utility model, the top rod mechanism further comprises a third adjusting nut capable of causing the third top rod to reciprocate and a third floating pin for connecting the floating top block and the third top rod.

[0013] According to the first aspect of the utility model, the frame body comprises a mounting base and a mounting rack perpendicular to the mounting base, and the first clamping jaw mechanism, the second clamping jaw mechanism and the top rod mechanism are arranged on the same side of the mounting rack.

[0014] According to the first aspect of the utility model, a second mounting plate for fixing the second top rod is arranged on the mounting rack, one end of the second mounting plate is fixedly connected with the mounting rack, and the other end of the second mounting plate is provided with a mounting hole through which the second top rod passes.

[0015] The above technical solution of the utility model has at least one of the following advantages or beneficial effects:

[0016] The utility model adjusts the first clamping jaw mechanism, the second clamping jaw mechanism and the top rod mechanism to adapt to workpieces of different sizes, and floating connections are adopted between the first floating pressing plate and the first clamping jaw, the floating top block and the third top rod and the second floating pressing plate and the second clamping jaw, so that various complex parts and working conditions can be adapted, the operation is simple, vibration can be effectively reduced, and thus the machining efficiency and machining precision are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described below in combination with the drawings and embodiments.

[0018] ATTACHMENT Figure 1The overall structural diagram of one embodiment of the present application;

[0019] The Figure 2 The bottom view of one embodiment of the present application;

[0020] The Figure 3 The partial sectional view of one embodiment of the present application;

[0021] The Figure 4 The top view of one embodiment of the present application;

[0022] The Figure 5 The side view of one embodiment of the present application. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0025] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0026] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features.

[0027] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connection" should be understood broadly, for example, it can be fixed connection or movable connection, can be detachable connection or non-detachable connection, or integrally connected, can be mechanical connection, can be electrical connection or can communicate with each other, can be directly connected, can be indirectly connected through intermediate medium, can be the communication inside two elements, indirect communication or the interaction of two elements.

[0028] The following disclosure provides many different implementations or examples to implement different schemes of the utility model.

[0029] Refer to the accompanying Figure 1 to the accompanying Figure 5 As shown in the figure, a floating center frame for male thread grinder includes frame body 1, first jaw mechanism 2, second jaw mechanism 3, ejector rod mechanism 4 and locking mechanism 5, wherein the second jaw mechanism 3 is below the first jaw mechanism 2, and the ejector rod mechanism 4 is arranged between the first jaw mechanism 2 and the second jaw mechanism 3.

[0030] In an embodiment of the utility model, the first jaw mechanism 2 includes first jaw 21 hinged with frame body 1, first ejector rod 22 acting on the movable end of first jaw 21, first floating pressing plate 23 arranged at the movable end of first jaw 21, first adjusting nut 24 for adjusting the reciprocating motion of first ejector rod 22, and first floating pin 25 for connecting first floating pressing plate 23 and first jaw 21, one side of first floating pressing plate 23 is connected with first jaw 21, the other side of first floating pressing plate 23 is provided with first pressing surface which can contact with workpiece, and the first pressing surface can be quenched.

[0031] In an embodiment of the utility model, the first mounting plate 6 is arranged at the top of frame body 1, which is convenient for rotating and pressing the movable end of first jaw 21 through first ejector rod 22, and then fixing the workpiece.

[0032] In an embodiment of the utility model, the second jaw mechanism 3 includes second jaw 31 hinged with frame body 1 at one end, second ejector rod 32 for pushing the other end of second jaw 31 to swing up and down, second floating pressing plate 33 arranged at the corresponding end of second jaw 31 and first floating pressing plate 23, second adjusting nut 34 for adjusting the reciprocating motion of second ejector rod 32, and second floating pin 35 for connecting second floating pressing plate 33 and second jaw 31.

[0033] In one embodiment of the utility model, one side of second floating pressing plate 33 is connected with second clamping jaw 31, the other side of second floating pressing plate 33 is equipped with second pressing surface that can contact with workpiece, second pressing surface can adopt quenching treatment, by the connecting mode of floating pin, the stress of each part of frame body 1 can be more uniform.

[0034] In one embodiment of the utility model, top rod mechanism 4 is arranged between first clamping jaw mechanism 2 and second clamping jaw mechanism 3, top rod mechanism 4 includes third top rod 41, floating top block 42 arranged at one end of third top rod 41, third adjusting nut 43 that can make third top rod 41 reciprocate and third floating pin 44 for connecting floating top block 42 and third top rod 41, wherein floating top block 42, first floating pressing plate 23 and second floating pressing plate 33 form movable cavity that can place workpiece.

[0035] In one embodiment of the utility model, frame body 1 includes mounting base 11 and mounting frame 12 that is perpendicular to mounting base 11, first clamping jaw mechanism 2, second clamping jaw mechanism 3 and top rod mechanism 4 are all arranged at the same side of mounting frame 12, second mounting plate 7 for fixing second top rod 32 is arranged on mounting frame 12, one end of second mounting plate 7 is fixedly connected with mounting frame 12, the other end of second mounting plate 7 is equipped with mounting hole that can pass through second top rod 32.

[0036] In one embodiment of the utility model, locking mechanism 5 includes first locking nut 51 arranged on second clamping jaw 31 and second locking nut 52 arranged on third top rod 41, by arranging first clamping jaw 21, second clamping jaw 31 and third top rod 41 on mounting frame 12, they swing on the same side of mounting frame 12, by adjusting first adjusting nut 24, second adjusting nut 34 and third adjusting nut 43, workpieces of different sizes can be adapted, at the same time, floating connection is adopted between first floating pressing plate 23 and first clamping jaw 21, floating top block 42 and third top rod 41 and second floating pressing plate 33 and second clamping jaw 31, various complex parts and working conditions can be adapted, so that when the upper bus and the measuring bus of workpiece are all adjusted to meet the required precision, first locking nut 51 and second locking nut 52 are adjusted respectively, second clamping jaw 31 and third top rod 41 are fixed, and the workpiece to be processed in movable cavity is locked.

[0037] The method for workpiece positioning by the floating center frame for external thread grinding machine comprises the following steps:

[0038] First, rotate first adjusting nut 24, second adjusting nut 34 and third adjusting nut 43 to make movable cavity can place workpiece to be processed, place workpiece in the movable cavity between floating top block 42, first floating pressing plate 23 and second floating pressing plate 33;

[0039] Further rotating the first adjusting nut 24, the first top rod 22 pushes the first clamping jaw 21 to ensure the first pressing surface contacts the workpiece surface;

[0040] Further rotating the second adjusting nut 34, the second top rod 32 pushes the second clamping jaw 31 to ensure the second pressing surface contacts the workpiece surface;

[0041] Further adjusting the top rod mechanism 4, rotating the third adjusting nut 43, the third top rod 41 drives the floating top block 42 to move, so that the floating top block 42 contacts the workpiece surface, and the upper generatrix and the measuring generatrix of the workpiece are all adjusted to meet the required accuracy;

[0042] Finally, adjust the first locking nut 51 and the second locking nut 52 respectively, fix the second clamping jaw 31 and the third top rod 41, and lock the workpiece to be processed in the movable cavity.

[0043] In the above machining steps, the operation sequence of the first clamping jaw mechanism 2, the second clamping jaw mechanism 3 and the top rod mechanism 4 can be adjusted according to the specific machining parts.

[0044] The workpiece positioning method through the floating center frame for external thread grinding machine solves the problem that the support stiffness and damping characteristics are difficult to accurately control in the prior art, can adapt to various complex parts and working conditions, especially when machining long shaft type workpieces, can effectively prevent the workpiece from bending and vibrating due to self weight or cutting force, is simple to operate, reduces vibration, and thus improves machining efficiency and machining precision.

[0045] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, the scope of the utility model is defined by the claims and its equivalents.

Claims

1. A floating center rest for an external thread grinder, characterized by, The utility model provides a kind of workpiece clamping device, including frame (1) and the first jaw mechanism (2) and second jaw mechanism (3) being arranged in the frame (1) side, top rod mechanism (4) is equipped between the first jaw mechanism (2) and the second jaw mechanism (3), the first jaw mechanism (2) includes the first jaw (21) being hinged with the frame (1) and the first top rod (22) being acted on the movable end of the first jaw (21), the movable end of the first jaw (21) is equipped with first floating pressing plate (23), the second jaw mechanism (3) includes the second jaw (31) being hinged with the frame (1) one end and the second top rod (32) for pushing the second jaw (31) other end up and down swing, the second jaw (31) and the first floating pressing plate (23) corresponding one end is equipped with second floating pressing plate (33), the top rod mechanism (4) includes third top rod (41) and the floating top block (42) being arranged in the third top rod (41) one end, the floating top block (42), the first floating pressing plate (23) and the second floating pressing plate (33) between constitute movable cavity that workpiece can be placed.

2. The floating mandrel for externally threaded grinding machines according to claim 1, characterized in that: It also includes a locking mechanism (5), the locking mechanism (5) includes the first locking nut (51) being arranged on the second jaw (31) and the second locking nut (52) being arranged on the third top rod (41).

3. The floating mandrel for externally threaded grinder as set forth in claim 1, wherein: The first jaw mechanism (2) further includes a first adjusting nut (24) for adjusting the reciprocating motion of the first top rod (22) and a first floating pin (25) for connecting the first floating pressing plate (23) and the first jaw (21).

4. The floating mandrel for externally threaded grinding machines according to claim 3, characterized in that: One side of the first floating pressing plate (23) is connected with the first jaw (21), and the other side of the first floating pressing plate (23) is provided with a first pressing surface that can contact the workpiece.

5. The floating mandrel for externally threaded grinder as defined in claim 3 wherein: The frame (1) is provided with a first mounting plate (6) through which the first top rod (22) passes, and one end of the first mounting plate (6) away from the first top rod (22) is hinged with the frame (1).

6. The floating mandrel for externally threaded grinder of claim 1 wherein: The second jaw mechanism (3) further includes a second adjusting nut (34) for adjusting the reciprocating motion of the second top rod (32) and a second floating pin (35) for connecting the second floating pressing plate (33) and the second jaw (31).

7. The floating mandrel for externally threaded grinding machines according to claim 6, characterized in that: One side of the second floating pressing plate (33) is connected with the second jaw (31), and the other side of the second floating pressing plate (33) is provided with a second pressing surface that can contact the workpiece.

8. The floating mandrel for externally threaded grinder of claim 1 wherein: The top rod mechanism (4) further includes a third adjusting nut (43) for enabling the third top rod (41) to reciprocate and a third floating pin (44) for connecting the floating top block (42) and the third top rod (41).

9. The floating master for externally threaded grinding machines according to claim 1, characterized in that: The frame (1) includes a mounting base (11) and a mounting rack (12) arranged perpendicular to the mounting base (11), and the first jaw mechanism (2), the second jaw mechanism (3), and the top rod mechanism (4) are arranged on the same side of the mounting rack (12).

10. The floating mandrel for externally threaded grinder of claim 9, wherein: The mounting frame (12) is provided with a second mounting plate (7) for fixing the second top rod (32), one end of the second mounting plate (7) is fixedly connected with the mounting frame (12), and the other end of the second mounting plate (7) is provided with a mounting hole through which the second top rod (32) passes.

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