Multi-line and single-line composite external thread grinding machine

Abstract

The utility model discloses a multi-line and single-line composite external thread grinding machine 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, and a workpiece main shaft and at least one outer circle supporting frame corresponding to the workpiece main shaft are arranged on the Z-direction sliding plate. The X-direction sliding plate is provided with a grinding wheel spindle and a swing angle device capable of driving the grinding wheel spindle to rotate, the grinding wheel spindle is concentrically provided with a coarse grinding wheel and a fine grinding wheel, the coarse grinding wheel is located on the outer side of the fine grinding wheel, and the workpiece spindle clamps the outer circle of one end of a workpiece and supports and fixes the outer circle of the workpiece through an outer circle supporting frame. The rough grinding wheel is arranged on the outer side of the fine grinding wheel, and the rough grinding wheel and the fine grinding wheel are mounted on the same grinding wheel spindle in a laminated manner, so that when a part is roughly ground, the fine grinding wheel cannot interfere with a tailstock, the machining cost is reduced, and the machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of grinding processing, more particularly relates to a kind of outer thread grinding machine of multi-line and single line composite. BACKGROUND

[0002] Mechanical processing is divided into rough machining, finishing, heat treatment and other processing methods, grinding belongs to finishing in mechanical processing, with less processing quantity, high precision, the existing thread grinding machine is double top with workpiece spindle and tailstock, and rough grinding wheel and finishing grinding wheel are respectively arranged on one side to complete the grinding of outer thread, so it is not only necessary to carry out center hole grinding operation before workpiece processing, and the steps are complicated, and when rough grinding parts, finishing grinding wheel will interfere with tailstock, resulting in the decrease of machining precision and the increase of processing cost. SUMMARY

[0003] The utility model mainly aims at providing a kind of outer thread grinding machine of multi-line and single line composite, which can avoid machining interference, ensure machining precision and reduce processing cost.

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

[0005] A kind of outer thread grinding machine of multi-line and single line composite, including bed and the Z direction slide and X direction slide being set on the end face of the bed, at least one outer circle support frame is provided on the Z direction slide and is correspondingly arranged with workpiece spindle, the X direction slide is equipped with grinding wheel spindle and the swing angle device that can drive the grinding wheel spindle rotation, rough grinding wheel and finishing grinding wheel are concentrically arranged on the grinding wheel spindle, and the rough grinding wheel is located at the outside of the finishing grinding wheel.

[0006] According to the first aspect embodiment of the utility model, the outer circle support frame includes first jaw mechanism, second jaw mechanism and top rod mechanism arranged between the first jaw mechanism and the second jaw mechanism.

[0007] According to the first aspect embodiment of the utility model, the first jaw mechanism includes first jaw, first top rod acting on the tail end of the first jaw and first floating pressure plate arranged on the movable end of the first jaw.

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

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

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

[0011] According to the first aspect of the utility model, the top rod mechanism comprises a third top rod and a floating top block arranged at one end of the third top rod, and the third top rod is provided with a third adjusting nut at one end away from the floating top block.

[0012] According to the first aspect of the utility model, the swing angle device comprises a stand, a first driving motor arranged on the stand and a swing part capable of rotating the grinding wheel spindle through the first driving motor.

[0013] According to the first aspect of the utility model, the swing part comprises a guide clutch plate, a swing mandrel and a swing sliding plate capable of rotating around the swing mandrel, and one end of the swing sliding plate away from the swing mandrel is in sliding connection with the guide clutch plate.

[0014] According to the first aspect of the utility model, a connecting rod is arranged perpendicularly to the swing sliding plate, one end of the connecting rod is connected with the output end of the first driving motor, and the other end of the connecting rod is connected with the swing sliding plate.

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

[0016] The utility model can support and fix the outer circle of the workpiece through the outer circle support frame, and the coarse grinding wheel is arranged outside the fine grinding wheel and stacked and installed on the same grinding wheel spindle, so that the fine grinding wheel does not interfere with the tailstock when the coarse grinding part is performed, and the contour is further fine ground to ensure the precision, which not only reduces the processing cost, but also improves the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

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

[0018] ATTACHED Figure 1 It is the overall structure diagram of one embodiment of the utility model;

[0019] ATTACHED Figure 2 It is the overall structure diagram of another view of one embodiment of the utility model;

[0020] ATTACHED Figure 3 It is the side view of one embodiment of the utility model;

[0021] ATTACHED Figure 4 It is the arrangement structure diagram of a plurality of outer circle support frames of one embodiment of the utility model;

[0022] attached Figure 5 is an outer circle support frame structure diagram of an embodiment of the present application. DETAILED DESCRIPTION

[0023] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals 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 application, and cannot be understood as a limitation on 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 the upper, lower, front, rear, 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 application and simplifying the description, and does not indicate or imply that the device or element indicated 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.

[0025] In the description of the present application, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, 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.

[0026] In addition, the terms "first", "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.

[0027] In the description of the present application, 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 between two elements.

[0028] The following disclosure provides many different embodiments or examples for implementing different aspects of the present application.

[0029] Referring to the drawings Figure 1 to the drawings Figure 5As shown, a multi-wire and single-wire combined external thread grinder comprises a bed 1, a workpiece spindle 2, an external circle support frame 3, a grinding wheel spindle 4, a swing angle device 5 and a grinding wheel dresser provided on the workpiece spindle 2.

[0030] In an embodiment of the utility model, 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 external circle support frame 3 and an X-direction sliding plate 12 for mounting the grinding wheel spindle 4 and the 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.

[0031] In an embodiment of the utility model, the external circle support frame 3 can be provided with one or more (refer to the attached drawings Figure 5 ), 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, the error is reduced, the external circle support frame 3 comprises a first clamping jaw mechanism 31, a second clamping jaw mechanism 32 provided on the same side of a frame body 34 and a top rod mechanism 33 provided between the first clamping jaw mechanism 31 and the second clamping jaw mechanism 32, and a movable cavity for placing a 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 external circle of the workpiece to be machined.

[0032] In an embodiment of the utility model, the first clamping jaw mechanism 31 comprises 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 provided on 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.

[0033] In an embodiment of the utility model, the second clamping jaw mechanism 32 comprises 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.

[0034] In an embodiment of the utility model, the top rod mechanism 33 comprises a third top rod 331 and a floating top block 332 provided 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, so that the external circle of one end of the workpiece can be clamped by the workpiece spindle 2, the workpiece external circle 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 for grinding the center hole and the tail seat top holding, which optimizes the process flow, reduces the machining cost and improves the machining efficiency.

[0035] In one embodiment of the utility model, first floating pressing plate 313 and first clamping jaw 311, floating top block 332 and third top rod 331, second floating pressing plate 323 and second clamping jaw 321 all adopt floating connection, can adapt to various complex parts and working conditions, simple operation can effectively reduce vibration, thereby improve processing efficiency and machining accuracy.

[0036] In one embodiment of the utility model, swing angle device 5 includes stand 51, first driving motor 52 arranged on stand 51 and swing part that can make grinding wheel spindle 4 rotate through first driving motor 52, wherein swing part includes guide clutch plate 61, swing mandrel, swing sliding plate 63 that can rotate around swing mandrel and connecting rod perpendicular to swing sliding plate 63, grinding wheel spindle 4 is arranged on swing sliding plate 63, two first rolling bearings are arranged on connecting rod, two second rolling bearings are arranged on swing mandrel, and two second rolling bearings are arranged at both ends of swing mandrel, so that the swing precision and bearing capacity of swing mandrel are further improved.

[0037] In one embodiment of the utility model, one end of swing sliding plate 63 away from swing mandrel is slidably connected with guide clutch plate 61, one end of connecting rod is connected with output end of first driving motor 52, and the other end of connecting rod is connected with swing sliding plate 63, that is, the driving mode of motor plus lead screw is adopted, so that the bearing capacity is improved, and the driving force is further increased.

[0038] Angle encoder is arranged at one end of swing mandrel away from swing sliding plate 63, so that the accuracy of swing angle is known through the feedback of angle encoder, and the swing angle is controlled in closed loop through angle encoder, so as to ensure the swing angle precision.

[0039] In one embodiment of the utility model, coarse grinding wheel 41 and fine grinding wheel 42 are concentrically arranged on grinding wheel spindle 4, coarse grinding wheel 41 is located on the outer side of fine grinding wheel 42, that is, coarse grinding wheel 41 and fine grinding wheel 42 are stacked and mounted on the same grinding wheel spindle 4, so that fine grinding wheel 42 does not interfere with tailstock when coarse grinding parts, one grinding wheel spindle can meet the coarse grinding of parts to remove most of the grinding allowance, and then the profile is refined through fine grinding wheel 42 to ensure precision, improve efficiency and reduce cost.

[0040] In one embodiment of the utility model, the grinding wheel dresser is preferably a diamond roller spindle, which is mounted on the spindle head of workpiece spindle 2 and coaxially arranged with workpiece spindle 2, so that it can rotate by borrowing the power of workpiece spindle 2 and use the diamond roller to shape coarse grinding wheel 41 and fine grinding wheel 42, thereby eliminating the need to additionally set up a diamond roller spindle and effectively reducing the size of the grinding machine.

[0041] In one embodiment of the utility model, the guiding and holding brake plate 61 adopts high-performance steel double-sided heat treatment, which not only ensures smooth sliding, but also improves the holding strength and reduces the process difficulty. The guiding and holding brake plate 61 is provided with a holding brake device for fixing the position of the swing sliding plate 63 on one side, the holding brake device comprises a second driving motor arranged on the stand column 51, the guiding and holding brake plate 61 can be made close to or away from the swing sliding plate 63 through the second driving motor, and the swing sliding plate 63 and the specific position of the grinding wheel spindle 4 are fixed by locking and holding through the holding brake device.

[0042] The process for processing by the external thread grinding machine with the multi-wire and single-wire composite utilizes 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 different sizes of workpieces, and placing the workpiece to be processed in the movable cavity;

[0043] 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;

[0044] Further moving the frame body 34 along the Z-axis to clamp the outer circle of the workpiece in cooperation with the workpiece spindle 2 on one side to complete the fixation of the workpiece to be processed;

[0045] Further, the swing sliding plate 63 is made to slide along the swing mandrel on the stand column 51 and the guiding and holding brake plate 61 by the first driving motor 52, and the grinding wheel spindle 4 is swung to the corresponding angle;

[0046] Finally, the outer circumferential surface of the workpiece to be processed in the movable cavity is processed by the rough grinding wheel 41 and the fine grinding wheel 42 respectively, and the rough grinding wheel 41 and the fine grinding wheel 42 are profiled by the grinding wheel dresser.

[0047] The external thread grinding machine with the multi-wire and single-wire composite does not need a tailstock to hold the small roller shaft parts, clamps the outer circle by the workpiece spindle 2 at one end, supports the outer circle of the workpiece by the outer circle support frame 3, and can complete the grinding of the external thread by positioning the workpiece with the outer circle, thereby not needing to grind the center hole and not needing the tailstock to hold, saving the process flow and the processing cost.

[0048] Moreover, the workpiece positioning method by the outer circle support 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 workpiece from bending and vibrating due to the weight or cutting force, is simple to operate, reduces vibration, and thus improves the machining efficiency and machining precision.

[0049] Although the embodiments of the utility model have been shown and described, those of ordinary skill 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. A multi-thread and single-thread combined external thread grinder, comprising a bed (1) and a Z-direction slide plate (11) and an X-direction slide plate (12) arranged on the upper end surface of the bed (1), characterized in that, The Z-direction slide plate (11) is provided with a workpiece spindle (2) and at least one outer circle support frame (3) corresponding to the workpiece spindle (2), the X-direction slide plate (12) is provided with a grinding wheel spindle (4) and a swing angle device (5) capable of driving the grinding wheel spindle (4) to rotate, the grinding wheel spindle (4) is provided with a rough grinding wheel (41) and a fine grinding wheel (42) concentrically, and the rough grinding wheel (41) is located outside the fine grinding wheel (42).

2. The multiple thread and single thread combined external thread grinder according to claim 1, characterized in that: The outer circle support frame (3) comprises a first clamping jaw mechanism (31), a second clamping jaw mechanism (32) provided on the same side of the frame body (34), and a top rod mechanism (33) provided between the first clamping jaw mechanism (31) and the second clamping jaw mechanism (32).

3. The multiple thread and single thread combined external thread grinder according to claim 2, characterized in that: The first clamping jaw mechanism (31) comprises 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) provided on the movable end of the first clamping jaw (311).

4. The multiple thread and single thread combined external thread grinder according to claim 3, characterized in that: 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).

5. The multiple thread and single thread composite external thread grinder of claim 2 wherein: The second clamping jaw mechanism (32) comprises 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).

6. The multiple thread and single thread composite external thread grinder according to claim 5, wherein: 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 multiple and single thread composite external thread grinder according to claim 2, wherein: The top rod mechanism (33) comprises a third top rod (331) and a floating top block (332) provided 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 multiple and single thread composite external thread grinder of claim 1 wherein: The swing angle device (5) comprises a stand column (51), a first driving motor (52) provided on the stand column (51), and a swing part capable of rotating the grinding wheel spindle (4) through the first driving motor (52).

9. The multiple thread and single thread composite external thread grinder of claim 8 wherein: The swing part comprises a guide clutch plate (61), a swing mandrel, and a swing sliding plate (63) capable of rotating around the swing mandrel, and one end of the swing sliding plate (63) away from the swing mandrel is slidably connected with the guide clutch plate (61).

10. The multiple thread and single thread composite external thread grinder according to claim 9, wherein: A connecting rod is provided perpendicular to the swing sliding plate (63), 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).

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