Tailstock-free external thread grinding machine capable of achieving outer circle positioning

Abstract

The utility model discloses a tailstock-free external thread grinding machine for excircle positioning, which comprises a machine body, a Z-direction sliding plate and an X-direction sliding plate, the Z-direction sliding plate and the X-direction sliding plate are arranged on the upper end face of the machine body, a workpiece spindle and a center frame for supporting the excircle of a workpiece are arranged on the Z-direction sliding plate, a grinding wheel spindle is arranged on the X-direction sliding plate, and the excircle at one end of the workpiece can be clamped through the workpiece spindle. The center frame is adjusted to support the outer circle of a workpiece, grinding machining operation of external threads is completed in cooperation with the grinding wheel spindle, grinding of a center hole and ejection of a tailstock are not needed, the technological process is optimized, machining cost is reduced, and machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the mechanical design technical field, more specifically relates to a kind of external thread grinder without tailstock with outside circle positioning. BACKGROUND

[0002] The existing external thread grinder is large in size, and adopts workpiece spindle and tailstock double top to complete the grinding of external thread, so center hole grinding operation is needed before workpiece machining, which increases the processing cost, and the process flow is complex and the processing efficiency is low when using workpiece spindle and tailstock double top to process small external thread parts. Therefore, an external thread grinder without tailstock holding, optimizing the processing process and reducing the processing cost is needed. SUMMARY

[0003] The main purpose of the utility model is to provide an external thread grinder without tailstock holding, effectively control the processing cost and improve the processing efficiency.

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

[0005] An external thread grinder without tailstock with outside circle positioning, comprising a bed body and a Z-direction slide plate and an X-direction slide plate provided on the end face of the bed body, a workpiece spindle and a center stand for supporting the outside circle of the workpiece are provided on the Z-direction slide plate, and a grinding wheel spindle is provided on the X-direction slide plate.

[0006] According to the first aspect of the utility model, the center stand comprises one or more stand bodies provided along the Z-direction slide plate, and a first clamping jaw mechanism, a second clamping jaw mechanism and a top rod mechanism are respectively provided on the same side of the stand body.

[0007] According to the first aspect of the utility model, the first clamping jaw mechanism comprises a first clamping jaw hinged to the stand body, a first top rod acting on the tail end of the first clamping jaw, and a first floating pressure plate provided on the movable end of the first clamping jaw.

[0008] According to the first aspect of the utility model, one side of the stand body is provided with a first adjusting nut for adjusting the reciprocating motion of the first top rod.

[0009] According to the first aspect of the utility model, the second clamping jaw mechanism comprises a second clamping jaw hinged to one end of the stand body and a second top rod for pushing the other end of the second clamping jaw to swing up and down, and the second clamping jaw is provided with a second floating pressure plate corresponding to one end of the first clamping jaw mechanism.

[0010] According to the first aspect of the utility model, one end of the second top rod away from the second clamping jaw is provided with a second adjusting nut.

[0011] According to the first aspect of the utility model, the top rod mechanism includes third top rod and the floating top block that sets up in third top rod one end, third top rod is equipped with third adjusting nut away from the one end of floating top block.

[0012] According to the first aspect of the utility model, the X direction slide plate is further provided with a grinding wheel spindle swing angle device, the grinding wheel spindle swing angle device includes a stand, a first driving motor provided on the stand, and a swing part capable of rotating the grinding wheel spindle through the first driving motor, the swing part includes a guide brake plate, a swing mandrel, and a swing sliding plate capable of rotating around the swing mandrel, one end of the swing sliding plate away from the swing mandrel is in sliding connection with the guide brake plate.

[0013] According to the first aspect of the utility model, one side of the guide brake plate is provided with a brake device for fixing the position of the swing sliding plate, the brake device includes a second driving motor provided on the stand, and the guide brake plate can be made to approach or away from the swing sliding plate through the second driving motor.

[0014] According to the first aspect of the utility model, the grinding wheel spindle is provided with a rough grinding wheel and a fine grinding wheel concentrically, and the rough grinding wheel is located outside the fine grinding wheel.

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

[0016] The utility model can clamp the outer circle of one end of the workpiece through the workpiece spindle, and then support the outer circle of the workpiece through the adjustment center frame, cooperate with the grinding wheel spindle to complete the grinding operation of the external thread, without grinding the center hole and tail seat top holding, which optimizes the process flow, reduces the processing cost, and improves the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

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

[0018] ATTACHMENT Figure 1 It is the overall structural drawing of an embodiment of the utility model

[0019] ATTACHMENT Figure 2 It is the side view of an embodiment of the utility model;

[0020] ATTACHMENT Figure 3 It is the top view of an embodiment of the utility model;

[0021] ATTACHMENT Figure 4 It is the center frame structure diagram of an embodiment of the utility model;

[0022] ATTACHMENT Figure 5The structure diagram of the no-grinding wheel spindle swing angle device of one embodiment of the present utility model;

[0023] Attached Figure 6 The multiple center frame arrangement structure diagram of one embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The embodiments of the present utility model will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs 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 and are only used to explain the present utility model, and cannot be understood as a limitation on the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation description, such as 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, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0026] In the description of the present utility model, the meaning of several is one or more, and the meaning of multiple is more than two, 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, it is only used 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 sequence of indicated technical features.

[0027] In addition, the terms "first" and "second" are only used 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.

[0028] In the description of the present utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection or movable connection, or detachable connection or non-detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, indirect communication or the interaction relationship of two elements.

[0029] The following disclosure provides many different embodiments or examples for implementing different aspects of the present utility model.

[0030] Referring to the drawings Figure 1To the attached Figure 6 As shown in the figure, a tailless outer thread grinder with outer circle positioning includes a bed 1, a workpiece spindle 2, a center frame 3, a grinding wheel spindle 4, a grinding wheel spindle swing angle device 5, and a grinding wheel dresser provided on the workpiece spindle 2.

[0031] In an embodiment of the present application, the upper end surface of the bed 1 is provided with a Z-direction sliding plate 11 for mounting the workpiece spindle 2 and the center frame 3, and an X-direction sliding plate 12 for mounting the grinding wheel spindle 4 and the grinding wheel spindle swing angle device 5, and an X-direction transmission mechanism and a Z-direction transmission mechanism are respectively arranged below the X-direction sliding plate 12 and the Z-direction sliding plate 11.

[0032] In an embodiment of the present application, the outer thread grinder can directly not use a tailstock, the workpiece end outer circle is clamped by the workpiece spindle 2, and the workpiece is driven to rotate, and the center frame 3 supports the workpiece outer circle, so that the entire workpiece is positioned with the outer circle, and the grinding operation is completed.

[0033] In an embodiment of the present application, the center frame 3 can be provided with one or more in sequence, so that the length of the machined part can be set, the long shaft type part machining can be coped with, the rigidity during machining is further improved, and the error is reduced. The center frame 3 includes a first clamping jaw mechanism 31, a second clamping jaw mechanism 32 arranged on the same side of the frame body 34, and a top rod mechanism 33 arranged between the first clamping jaw mechanism 31 and the second clamping jaw mechanism 32, and a movable cavity for placing the workpiece is arranged between the first clamping jaw mechanism 31, the second clamping jaw mechanism 32 and the top rod mechanism 33, which is used for supporting the outer circle of the workpiece to be machined.

[0034] In an embodiment of the present application, the first clamping jaw mechanism 31 includes a first clamping jaw 311 hinged to the frame body 34, a first top rod 312 acting on the tail end of the first clamping jaw 311, and a first floating pressing plate 313 arranged at the movable end of the first clamping jaw 311, and one side of the frame body 34 is provided with a first adjusting nut 314 for adjusting the reciprocating motion of the first top rod 312.

[0035] In an embodiment of the present application, the second clamping jaw mechanism 32 includes a second clamping jaw 321 hinged to one end of the frame body 34 and a second top rod 322 for pushing the other end of the second clamping jaw 321 to swing up and down, and the second clamping jaw 321 is provided with a second floating pressing plate 323 at the corresponding end of the first clamping jaw mechanism 31, and the second top rod 322 is provided with a second adjusting nut 324 at the end away from the second clamping jaw 321.

[0036] In one embodiment of the utility model, the top rod mechanism 33 includes the third top rod 331 and the floating top block 332 arranged at one end of the third top rod 331, and the third adjusting nut 333 is arranged at the end of the third top rod 331 away from the floating top block 332, so that the outer circle of one end of the workpiece can be clamped by the workpiece main shaft 2, the outer circle of the workpiece is supported by adjusting the first adjusting nut 314, the second adjusting nut 324 and the third adjusting nut 333, and then the grinding operation of the external thread is completed, without the need of grinding the center hole and the tailstock holding, the process flow is optimized, the processing cost is reduced, and the processing efficiency is improved.

[0037] In one embodiment of the utility model, the first floating pressing plate 313 and the first clamping jaw 311, the floating top block 332 and the third top rod 331, and the second floating pressing plate 323 and the second clamping jaw 321 are all connected by floating, which can adapt to various complex parts and working conditions, is simple to operate, can effectively reduce vibration, and thus improves the processing efficiency and the processing accuracy.

[0038] In one embodiment of the utility model, the grinding wheel main shaft swing angle device 5 includes the column 51, the first driving motor 52 arranged on the column 51, and the swing part capable of rotating the grinding wheel main shaft 4 through the first driving motor 52, wherein the swing part includes the guide clutch plate 61, the swing mandrel, the swing sliding plate 63 capable of rotating around the swing mandrel, and the connecting rod perpendicular to the swing sliding plate 63, the grinding wheel main shaft 4 is arranged on the swing sliding plate 63, two first rolling bearings are arranged on the connecting rod at intervals, two second rolling bearings are arranged on the swing mandrel, and the two second rolling bearings are arranged at the two ends of the swing mandrel, so that the swing accuracy and the bearing capacity of the swing mandrel are further improved. A-axis swing is not needed, that is, the grinding wheel main shaft swing angle device 5 is not needed on the bed body 1, and the drawings can be referred to for the specific structure of the grinding wheel main shaft swing angle device 5. Figure 6 .

[0039] In one embodiment of the utility model, one end of the swing sliding plate 63 away from the swing mandrel is slidably connected with the guide clutch plate 61, one end of the connecting rod is connected with the output end of the first driving motor 52, and the other end of the connecting rod is connected with the swing sliding plate 63, that is, the driving mode of the motor plus the lead screw is adopted, so that the bearing capacity is improved, and the driving force is further increased.

[0040] An angle encoder is arranged at the end of the swing mandrel away from the swing sliding plate 63, so that the accuracy of the swing angle can be known through the feedback of the angle encoder, and the swing angle is controlled in a closed loop through the angle encoder, so as to ensure the swing angle accuracy.

[0041] In one embodiment of the utility model, the grinding wheel spindle 4 is concentrically provided with a rough grinding wheel 41 and a fine grinding wheel 42, the rough grinding wheel 41 is located at the outer side of the fine grinding wheel 42, that is, the rough grinding wheel 41 and the fine grinding wheel 42 are laminatedly installed on the same grinding wheel spindle 4, therefore, when rough grinding the part, the fine grinding wheel 42 will not interfere with the tailstock, realizing that one grinding wheel spindle can satisfy rough grinding of the part to remove most of the grinding allowance, and then the profile is finely ground by the fine grinding wheel 42 to ensure precision, improve efficiency and reduce cost.

[0042] In one embodiment of the utility model, the grinding wheel dresser is preferably a diamond roller spindle, is installed on the spindle head of the workpiece spindle 2 and is coaxially arranged with the workpiece spindle 2, therefore, the power rotation of the workpiece spindle 2 can be borrowed, the rough grinding wheel 41 and the fine grinding wheel 42 are profiled by the diamond roller, thereby, it is not necessary to additionally arrange the diamond roller spindle, and the size of the grinding machine is effectively reduced.

[0043] In one embodiment of the utility model, the guide clamping plate 61 is made of high-performance steel and is double-sided heat treated, which not only ensures smooth sliding, but also improves clamping strength and reduces process difficulty. A clamping device for fixing the position of the swing sliding plate 63 is arranged on one side of the guide clamping plate 61, the clamping device comprises a second driving motor arranged on the stand column 51, the guide clamping plate 61 can be made close to or away from the swing sliding plate 63 through the second driving motor, and the specific position of the swing sliding plate 63 and the grinding wheel spindle 4 is fixed through the locking and clamping of the clamping device.

[0044] The process for machining by the external thread grinding machine comprises the following steps: first, adjusting the first clamping jaw mechanism 31, the second clamping jaw mechanism 32 and the ejector rod mechanism 33 to adapt to workpieces of different sizes, and placing the workpiece to be machined in the movable cavity; further, rotating the first adjusting nut 314, the second adjusting nut 324 and the third adjusting nut 333 to make the first ejector rod 312 push the first floating pressing plate 313, the second ejector rod 322 push the second floating pressing plate 323 and the third ejector rod 331 push the floating top block 332 to support the outer circle of the workpiece; further, moving the frame body 34 along the Z axis, clamping the outer circle of the workpiece in cooperation with the workpiece spindle 2 on one side to complete the fixing of the workpiece to be machined; further, rotating the swing sliding plate 63 along the swing mandrel on the stand column 51 and the guide clamping plate 61 by the first driving motor 52 to place the grinding wheel spindle 4 at a corresponding angle; finally, machining the outer circular surface of the workpiece to be machined in the movable cavity by the rough grinding wheel 41 and the fine grinding wheel 42 respectively, and profiling the rough grinding wheel 41 and the fine grinding wheel 42 by the grinding wheel dresser.

[0045] The outer thread grinder is not needed to be supported by tailstock for small roller shaft parts, utilizes the outer circle clamped by the workpiece spindle 2 one end, the workpiece outer circle is supported by the center frame 3, the workpiece is positioned by the outer circle, and the grinding of the outer thread can be completed, so that the center hole is not needed to be lapped, the tailstock is not needed to be supported, the machining process flow is saved, and the machining cost is saved.

[0046] Moreover, the workpiece positioning method using the center frame 3 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 parts, can effectively prevent the bending and vibration of the workpiece caused by the weight or cutting force, is simple to operate, reduces vibration, and thus improves the machining efficiency and machining precision.

[0047] 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, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An external thread grinder with tailless seat for positioning with the outside circle, characterized in that, The machine comprises a machine body (1), a Z-direction slide plate (11) and an X-direction slide plate (12) arranged on the upper end surface of the machine body (1), the Z-direction slide plate (11) is provided with a workpiece spindle (2) and a center rest (3) for supporting the outer circle of the workpiece, and the X-direction slide plate (12) is provided with a grinding wheel spindle (4).

2. The externally positioned tailless seat external thread grinder according to claim 1, characterized in that: The center rest (3) comprises one or more rest bodies (34) arranged on the Z-direction slide plate (11), and a first clamping jaw mechanism (31), a second clamping jaw mechanism (32) and a top rod mechanism (33) arranged on the same side of the rest body (34) respectively.

3. A thread grinder with tailless seat for external positioning, according to claim 2, characterized in that: The first clamping jaw mechanism (31) comprises a first clamping jaw (311) hinged to the rest body (34), a first top rod (312) acting on the tail end of the first clamping jaw (311), and a first floating pressure plate (313) arranged on the movable end of the first clamping jaw (311).

4. The externally positioned, tailless seat, external thread grinder of claim 3 wherein: One side of the rest body (34) is provided with a first adjusting nut (314) for adjusting the reciprocating motion of the first top rod (312).

5. The externally positioned tailless seat thread grinder of claim 2 wherein: The second clamping jaw mechanism (32) comprises a second clamping jaw (321) hinged to one end of the rest body (34) and a second top rod (322) for pushing the other end of the second clamping jaw (321) to swing up and down, and the second clamping jaw (321) is provided with a second floating pressure plate (323) at the corresponding end of the first clamping jaw mechanism (31).

6. A thread grinder with tailless seat for external positioning as claimed in claim 5, characterized in that: The second top rod (322) is provided with a second adjusting nut (324) at the end away from the second clamping jaw (321).

7. The externally positioned, tailless seat, external thread grinder of claim 2 wherein: The top rod mechanism (33) comprises a third top rod (331) and a floating top block (332) arranged at one end of the third top rod (331), and the third top rod (331) is provided with a third adjusting nut (333) at the end away from the floating top block (332).

8. The externally positioned tailless seat external thread grinder of claim 1 wherein: The X-direction slide plate (12) is further provided with a grinding wheel spindle swing angle device (5), the grinding wheel spindle swing angle device (5) comprises a vertical column (51), a first driving motor (52) arranged on the vertical column (51), and a swing part capable of rotating the grinding wheel spindle (4) through the first driving motor (52), the swing part comprises a guide brake plate (61), a swing mandrel, and a swing sliding plate (63) capable of rotating around the swing mandrel, and the end of the swing sliding plate (63) away from the swing mandrel is in sliding connection with the guide brake plate (61).

9. A thread grinder with tailless seat for external positioning as claimed in claim 8, characterized in that: One side of the guide brake plate (61) is provided with a brake device for fixing the position of the swing sliding plate (63), the brake device comprises a second driving motor arranged on the vertical column (51), and the guide brake plate (61) can be made close to or away from the swing sliding plate (63) through the second driving motor.

10. The externally positioned tailless seat external thread grinder of claim 1 wherein: The grinding wheel spindle (4) is concentrically provided with a rough grinding wheel (41) and a fine grinding wheel (42), and the rough grinding wheel (41) is located on the outer side of the fine grinding wheel (42).

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