KR20110053532A - Lapping machine for lapping drive shaft circle surface - Google Patents

Abstract

PURPOSE: A lapping machine for cutting spherical grooves of a drive shaft for a hydraulic motor and a pump is provided to maintain accurate lapping positions by accurately transferring a drive shaft by one pitch for each lapping position. CONSTITUTION: A lapping machine for cutting spherical grooves of a drive shaft for a hydraulic motor and a pump comprises a pitch transfer rotary shaft(44) which is fixed to an upper structure and angularly rotated through an upper bearing so that the upper structure and a drive shaft are simultaneously angularly rotated. At the same time as lapped one(C1) of spherical grooves of the drive shaft is deviated from the rotation center of a main rotary shaft, the next one(C2) is located in the rotation center of the main rotary shaft. Accordingly, the drive shaft is simultaneously rotated through a turn table when the spherical groove of the drive shaft is lapped by a lap and the rotational friction between the spherical groove and the lap is increased.

Description

Lapping machine for lapping drive shaft circle surface of drive shafts for hydraulic motors and pumps

The present invention relates to a lapping machine for spherical lapping processing of a drive shaft for a hydraulic motor and a pump, and more particularly, a lapping process for a spherical (semi-spherical) groove formed on one end surface of a drive shaft of a hydraulic bent axis motor and a pump. The present invention relates to a wrapper for machining drive shafts of hydraulic motors and pumps, which makes it possible to process parts more quickly and with better quality.

In general, a lapping machine is used to more accurately mirror the surface of a workpiece such as a cylindrical outer surface, an inner surface, a plane, a gear, etc., which has been polished by a grinding machine, and the like. Abrasion occurs between the surfaces of the workpiece, so that the surface of the workpiece is finely machined, so that the surface of the workpiece is machined smoothly like a mirror surface.

As another object for lapping, a number of spherical hemispheres have been carried out on one end of the drive shaft of a hydraulic bent motor and pump.

The conventional method of spherical (semi-spherical) wrapping on the drive shaft of the hydraulic bent axis motor and pump is to secure the drive shaft 40 to the chuck as shown in FIG. LAP) is rotated to perform lapping on the groove-shaped sphere 90 formed on one end surface of the drive shaft 40.

Next, as shown by the arrows in FIG. 7, the drive shaft 40 is moved to the next sphere forming position and fixed, and then the drive shaft 40 is rotated in the same manner as the next to the drive shaft 40 in the fixed state. The sphere 90 will be wrapped.

After the first ball of the drive shaft is wrapped, the drive shaft is moved to the next position to be fixed, and then the second ball is wrapped, and thus the processing time is long and the drive shaft is moved. There was a problem that a lot of defective rate occurs due to not accurately grasp the sphere lapping machining position.

In order to solve the above problems of the present invention, when lapping the plurality of spheres formed on the drive shaft of the hydraulic bent axis motor and the pump by the rotation of the wrap, the drive shaft is also rotated at the same time, the sphere wrapping The machining time can be greatly shortened, and the drive shaft is precisely transferred by one pitch for each sphere wrapping position, but the angular transfer movement is carried out so that the sphere is positioned at the center of rotation thereof. The object is to provide a wrapping machine for the drive shaft machining of hydraulic motors and pumps that can be improved.

The present invention for achieving the above object is a lower worktable equipped with a rotary drive means; A wrap processing unit provided at an upper end of an upper workbench vertically erected at one corner position of the lower workbench; A turntable rotatably mounted on a central portion of the lower worktable by a rotation driving means; A lower structure and an upper structure integrated on the turntable and sequentially stacked; A chuck mounted on an upper surface of the upper structure to fix the drive shaft to be spherical wrapped; A rotation shaft for pitch transfer mounted on the bottom center of the upper structure and extending into the lower structure; A rotary restraint cylinder integrally connected to an outer circumferential portion of the upper bearing mounted to the upper end of the rotation shaft for pitch transfer, for inserting or separating a piston into a constraining groove formed in the upper structure; A fixed body integrally mounted to a lower end of the rotation shaft for pitch feed, and having a locking groove formed on an outer circumferential surface thereof; A rotating body mounted on an outer diameter surface of the fixed body via a lower bearing and having a lock guide hole passing through the lock groove; A fixed body locking cylinder fixedly mounted at a predetermined position on the outer diameter surface of the rotating body while the locking piston is inserted into the locking guide hole; A pitch conveying cylinder fixedly mounted on a lower structure away from the outer diameter surface of the rotating body to a predetermined position; One side end is connected to a predetermined position of the outer surface of the rotating body, the other end is connected to the piston of the pitch transfer cylinder, the ear link to rotate the rotating body by switching the linear movement of the pitch transfer cylinder; It provides a wrapping machine for the drive shaft processing of the hydraulic motor and the pump, characterized in that configured to include.

As a preferred embodiment of the present invention, the rotation driving means includes: a main rotary shaft integrally formed at the center of the bottom surface of the turntable and extending through the lower workbench; A driven pulley mounted at the lower end of the main rotary shaft; A driving motor fixedly mounted at a lower surface of the lower worktable; A drive pulley formed integrally with the shaft of the drive motor; A timing belt connected between the driven pulley and the driving pulley; Characterized in that configured to include.

In another preferred embodiment of the present invention, the wrap processing unit: a flat plate structure formed with a slot for each rotation, the wrap fixing plate mounted to the upper end of the upper workbench; A wrap processing motor coupled to the slot so as to be rotatable; A labing cylinder mounted on one side of an upper end of the upper workbench to rotate the wrap machining motor along a slot; A wrap fixed to a lower end of a shaft of the wrap processing motor to wrap a sphere of a drive shaft; And a control unit.

In addition, a pair of fixed stoppers for limiting the angular rotation angle of the rotating body is mounted at the adjacent position of the rotating body in the lower structure, and a moving stopper that contacts each fixed stopper at a predetermined position on the outer surface of the rotating body is integrally formed. It is characterized in that it is mounted.

In addition, the secondary work object integrally extended to the side of the lower workbench is characterized in that the articulated three-dimensional measuring instrument for measuring the quality of the wrapping of the drive shaft.

Through the above problem solving means, the present invention provides the following effects.

According to the present invention, when lapping a ball formed on a drive shaft of a hydraulic bent-type motor and a pump, the drive shaft is also rotated at the same time, thereby increasing the rotational frictional processing force between the wrap and the drive shaft, thereby greatly reducing the wrapping time. Can be.

In addition, after lapping the sphere of the drive shaft, in order to wrap the next sphere, the drive shaft is precisely rotated by a pitch, which is a distance between the sphere and the sphere, so that the wrapping position of a plurality of spheres formed in the drive shaft is maintained accurately. As a result, the lapping quality can be greatly improved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view illustrating a lapping machine for spherical wrapping of a drive shaft for a hydraulic motor and a pump according to the present invention, FIG. 2 is a side view, FIG. 3 is an enlarged view of a main part of FIG. 2, and FIG. 4 is a plan view, respectively. .

Looking at the skeletal structure for implementing the wrapping machine according to the invention, the lower work table 12 which is supported on the bottom surface of the workplace, and the upper work platform (10) which is integrally and vertically erected at one corner position of the lower work platform 12 And a turntable 14 rotatably mounted on an upper surface of the lower work table 12, an understructure 16 integrally mounted on an upper surface of the turntable 14, and an upper portion of the lower structure 16. Consisting of the upper structure 18 is fixed integrally, the lower and upper structure 16, 18 is rotated together when the turntable 14 is rotated.

The bottom of the turntable 14 is integrally connected to the main rotary shaft 22 extending downward through the bearing mounted in the center of the lower work table 12, the main rotary shaft 22 at the lower end of the main rotary shaft 22 Rotation drive means 20 for rotating the turntable 14 is connected through.

More specifically, as the rotary drive means 20, the driven pulley 23 is mounted to the lower end of the main rotary shaft 22, the drive motor 24 is fixed to a predetermined position on the bottom surface of the lower work platform 12 The driving pulley 25 and the driven pulley 23 of the main rotating shaft 22 are integrally formed on the shaft of the driving motor 24 and are connected by the timing belt 26.

Therefore, the driving pulley 25 rotates together with the driving of the driving motor 24, and the rotational force is transmitted to the main rotating shaft 22 through the timing belt 26 and the driven pulley 23, and the main rotating shaft. In accordance with the rotation of 22, the turntable 14 rotates at a predetermined speed.

On the other hand, at the upper end of the upper work platform 10 that is vertically erected at one corner position on the lower work table 12 is provided with a wrap processing part 30, the wrap processing part 30 is a hydraulic bevel axis motor and pump It serves to substantially wrap the plurality of spheres 90 formed in the drive shaft 40 of the.

As one configuration of the wrap processing unit 30, a flat plate-shaped wrap fixing plate 34 is formed in which an upper end of the upper work table 10 is formed with a slot 32 having an arc shape for each turn, and the slot 32 A lap motor (35: divided into a cylinder for raising and lowering and a motor for rotating the lap) is rotatably coupled to each other.

In addition, a wrap cylinder 36 is fixedly mounted in a horizontal direction as a driving means for rotating the wrap machining motor 35 along the slot 32 on one side of the upper workbench 10.

In addition, a wrap 38 for wrapping a sphere of the drive shaft 40 is mounted at the lower end of the shaft of the wrapping motor 35.

Therefore, in the state where the drive shaft 40 is fixed using the chuck 42, the lap processing motor 35 is driven and the lap 38 rotates while the sphere 90 of the drive shaft 40 is rotated. When the inner surface is wrapped, at this time, the lap motor 35 moves vertically or inclines to one side or the other side while the lap motor 35 moves along the slot 32 by the front and rear driving of the lap cylinder 36. 38 facilitates lapping along the entire curved surface of the sphere 90.

According to the present invention, when lapping a plurality of spheres 90 formed in the drive shaft 40, the drive shaft 40 is also rotated at the same time, so that the spheres 90 of the wrap 38 and the drive shaft 40 The rotational frictional processing force between the two was increased to greatly reduce the sphere lapping time, and after lapping one of the plurality of spheres 90 of the drive shaft 40, the next sphere 90 was removed. When lapping, the drive shaft 40 is angularly rotated by one pitch, the distance between the sphere 90 and the sphere 90, so that the wrapping position for the plurality of spheres 90 formed in the drive shaft 40 can be accurately determined. The main point is to arrange them.

To this end, the substructure 16 and the superstructure 18 which are integrated on the turntable 14 and are sequentially stacked on the turntable 14 are precisely pitched by one pitch, which is the distance between the sphere 90 and the sphere 90. The means for angular rotation are intensively installed, and the configuration is as follows.

First, a chuck 42 for fixing a drive shaft 40 to be spherically wrapped is disposed on an upper surface of the upper structure 18, and a central portion of the lower surface of the upper structure 18 extends into the lower structure 16. Pitch feed rotation shaft 44 is integrally formed.

The upper bearing 46 is mounted on the upper end of the rotation shaft 44 for pitch transfer, and the rotational restraint cylinder 50 for raising and lowering the piston 52 in the vertical direction is mounted at a predetermined position of the lower structure 16. At this time, the outer circumferential portion of the rotational binding cylinder 50 and the outer diameter portion of the upper bearing 46 are integrally connected by using a bracket or the like.

Accordingly, the piston 52 is inserted into the restraint groove 48 formed at a predetermined position on the outer circumferential portion of the upper structure 18 when the rotational restraint cylinder 50 is driven, and the upper structure 18 when the turntable 14 rotates. Rotated.

In addition, a fixed body 56 having a locking groove 54 formed on an outer circumferential surface thereof is fixedly mounted on a lower end of the rotation shaft 44 for pitch transfer, and a lower bearing 58 on an outer diameter surface of the fixed body 56. The rotating body 60 is rotatably mounted via the bar, and the rotating body 60 is formed with a locking guide hole 62 coinciding with the locking groove 54 of the fixing body 56.

In addition, a fixed cylinder locking cylinder 66 is mounted at a predetermined position of the outer surface of the rotating body 60, and the locking piston 64 of the fixed locking cylinder 66 locks the rotating body 60. In the state of being located in the induction hole 62, the back and forth movement is inserted into or removed from the locking groove 54 of the fixing body 56.

In particular, the pitch transport cylinder 70, which is a driving means for substantially rotating the drive shaft 40, is mounted on the lower structure 16 away from the outer diameter surface of the rotating body 60 to a predetermined position.

At this time, the linear motion of the piston 72 of the pitch feeding cylinder 70 is converted into a rotational movement between the piston 72 of the pitch feeding cylinder 70 and a predetermined position of the outer diameter surface of the rotating body 60. Islet link 68 for rotating the rotating body 60 is connected.

In addition, in order to limit the angular rotational movement angle of the rotating body of the rotating body 60 to the angular rotational angle corresponding to one pitch, on the lower structure 16, a pair of fixed stoppers 74 face each other and are spaced apart from each other. The moving stopper 76 which is rotated together at the time of each rotation of the rotating body 60 to reach each of the fixed stoppers 74 is integrally mounted at a predetermined position of the outer surface of the rotating body 60.

On the other hand, the multi-joint three-dimensional measuring machine 82 for integrally extending the auxiliary work platform 80 on the side of the lower work table 12, and measuring the wrapping quality of the drive shaft 40 on the work bench 80. ), It is possible to measure spherical wrapping quality using the multi-joint three-dimensional measuring instrument after lapping process of the drive shaft. Reduction of defective rate and shortening of working time can be realized.

Here, the operation of the wrapping machine of the present invention configured as described above is as follows.

5a to 5e are a plan view for explaining the operation of rotating the drive shaft by one pitch as a lapping machine for spherical wrapping of the drive shaft for the hydraulic motor and the pump according to the present invention, Figure 6 is a wrap And a schematic diagram illustrating the operation of rotating the drive shaft together.

First, to fix the drive shaft 40 in which a plurality of spheres 90 are formed along the circumferential direction to the chuck 42 on the upper structure 18,

Next, the rotational constraint cylinder 50 is driven so that the piston 52 is inserted into the restraint groove 48 of the upper structure 18.

Subsequently, when the driving motor 24 of the rotation driving means 20 is driven, the rotational force is transmitted to the main rotation shaft 22 by the timing belt 26 connected between the driving pulley 25 and the driven pulley 23. do.

Accordingly, as the main rotary shaft 22 rotates, the turntable 14 also rotates together with the lower structure 16 and the upper structure 18 on the turntable 14 simultaneously with the rotation of the turntable 14. In addition, since the piston 52 of the rotation restraint cylinder 50 is inserted into the constraining groove 48 of the upper structure 18, the rotation restraint cylinder 50 has an upper bearing. Without turning along 46, the upper structure 18 is constrained to rotate together.

As such, when the upper structure 18 rotates, the drive shaft 40 fixed by the chuck 42 on the upper structure 18 also rotates, and thus, the wrapping object of the drive shaft 40 is rotated. The sphere 90 center point is always coincident with the center of rotation of the main axis of rotation 22.

Accordingly, as the lap motor 35 is driven, as shown in the left view of FIG. 6, the wrap 38 rotates to wrap the inner surface of the sphere 90 of the drive shaft 40 while driving as described above. Since the shaft 40 also rotates at the same time, the rotational frictional processing force between the spheres 38 and the spheres 90 of the drive shaft 40 is increased, thereby greatly reducing the lapping processing time while improving the sphere wrapping quality.

When the lapping of one of the plurality of spheres 90 of the drive shaft 40 is completed in this way, the drive shaft 40 is the distance between the sphere 90 and the sphere 90 for the next sphere 90 processing. The exact rotation of each pitch is performed as follows.

That is, when one of the spheres 90 of the plurality of spheres 90 of the drive shaft 40 is wrapped, in order to move the central axis of the sphere C2, which is the next wrapping object, to the center of rotation of the main shaft 22. The drive shaft 40 must be rotated angularly.

To this end, in the state where the locking piston 64 of the stationary locking cylinder 66 is separated from the locking groove 54 of the rotation shaft 44 for pitch feed (see FIG. 5A), the stationary locking cylinder (66) to drive the locking piston 64 of the fixed body locking cylinder 66 passes through the lock guide hole 62 of the rotating body 60 is inserted into the locking groove 54 of the fixed body 56 State (see FIG. 5B).

Subsequently, when the pitch transfer cylinder 70 is driven as shown in FIG. 5C, the piston 72 moves forward and simultaneously the pivot link 68 rotates the rotating body 60.

At the same time, the stationary locking cylinder 66 mounted on the rotating body 60 also rotates with the rotating body 60. At this time, the locking piston 64 of the fixed locking cylinder 66 is Since the state is inserted into the locking groove 54 of the fixed body 56, the fixed body 56 and the fixed shaft 56 are rotated to the pitch feed rotary shaft 44 is fixedly mounted.

Thus, the pitch feed rotary shaft 44 is angular rotation via the upper bearing 46, the upper structure 18 is fixed to the pitch feed rotary shaft 44, and the upper structure 18 The drive shaft 40 fixed using the chuck 42 is also rotated together.

Therefore, the wrapped sphere C1 of the plurality of spheres 90 of the drive shaft 40 deviates from the center of rotation of the main rotating shaft 22, and the next sphere C2 rotates of the main rotating shaft 22. It is located at the center point.

Accordingly, as shown in the right view of FIG. 6, the wrap 38 rotates to wrap the inner surface of the sphere C2 of the drive shaft 40, and at the same time, the drive shaft 40 is driven by the turntable 14 as described above. Since the rotating state is also at the same time, the lapping 38 and the spherical C2 of the drive shaft 40 are similarly rotated, and the lapping is easily performed.

On the other hand, after the angular rotation of the rotation axis 44 for the pitch feed to rotate the drive shaft 40 together, as shown in Fig. 5d, the locking piston 64 of the fixed lock cylinder 66 is reversed And the piston 72 of the pitch feed cylinder 70 moves backward as shown in FIG. 5E. The rotating body 60 is angularly rotated to its original position, and the fixation locking cylinder 66 and the pitch conveying cylinder 70 return to the ready position for angular rotation of the drive shaft for lapping to the next sphere. I will go.

1 is a front view showing a lapping machine for sphere lapping processing of a drive shaft for a hydraulic motor and a pump according to the present invention,

Figure 2 is a side view showing a lapping machine for sphere lapping processing of the drive shaft for the hydraulic motor and pump according to the present invention,

3 is an enlarged view illustrating main parts of FIG. 2;

Figure 4 is a plan view showing a lapping machine for sphere lapping processing of the drive shaft for the hydraulic motor and pump according to the present invention,

5a to 5e is a lapping machine for the old lapping process of the drive shaft for the hydraulic motor and the pump according to the present invention, a plan view of the main portion for explaining the operation of rotating the drive shaft by one pitch,

6 is a schematic diagram illustrating an operation of rotating a drive shaft together with a wrap as a wrapping machine for spherical wrapping of a drive shaft for a hydraulic motor and a pump according to the present invention;

7 is a schematic diagram illustrating a spherical lapping method for a conventional drive shaft.

<Explanation of symbols for the main parts of the drawings>

10: upper workbench 12: lower workbench

14 turntable 16 substructure

18: upper structure 20: rotation driving means

22: main axis of rotation 23: driven pulley

24: drive motor 25: drive pulley

26: timing belt 30: wrap processing unit

32: slot for each round 34: wrap fixing plate

35: motor for lapping 36: cylinder for lapping

38: wrap 40: drive shaft

42: chuck 44: rotation axis for pitch feed

46: upper bearing 48: restraint groove

50: cylinder for rotational restriction 52: piston

54: locking groove 56: fixed body

58: lower bearing 60: rotating body

62: locking guide hole 64: locking piston

66: cylinder for locking the lock 68: two-section link

70: pitch feed cylinder 72: pitch feed piston

74: fixed stopper 76: moving stopper

80: work bench 82: multi-joint 3D measuring machine

90: sphere

Claims (5)

A lower worktable 12 on which the rotation driving means 20 is mounted; A wrap processing unit 30 provided at an upper end of the upper work platform 10 which is vertically erected at one corner position on the lower work platform 12; A turntable (14) rotatably mounted on the central portion of the lower work platform (12) by rotation driving means (20); A lower structure (16) and an upper structure (18) which are integrated on the turntable (14) and are sequentially stacked and rotate together when the turntable (14) rotates; A chuck 42 mounted on the upper surface of the upper structure 18 to fix the drive shaft 40 to be spherically wrapped; A rotation shaft 44 for pitch transfer, which is mounted at the center of the bottom surface of the upper structure 18 and extends into the lower structure 16; It is integrally connected to the outer circumferential portion of the upper bearing 46 mounted on the upper end of the rotation shaft 44 for pitch transfer, and inserting or separating the piston 52 into the restraint groove 48 formed in the upper structure 18. A rotary restraint cylinder 50; A fixed body 56 which is integrally mounted to the lower end of the rotation shaft 44 for pitch feed and has a locking groove 54 formed on an outer circumferential surface thereof; A rotating body (60) mounted on an outer diameter surface of the fixing body (56) via a lower bearing (58) and having a locking guide hole (62) passing through the locking groove (54) therethrough; A fixed body locking cylinder (66) fixedly mounted at a predetermined position on the outer diameter surface of the rotating body (60) while the locking piston (64) is inserted into the locking guide hole (62); A pitch transfer cylinder (70) fixedly mounted on the substructure (16) away from the outer diameter surface of the rotating body (60) to a predetermined position; One end is connected to a predetermined position on the outer diameter surface of the rotating body 60, the other end is connected to the piston 72 of the pitch feed cylinder 70, to switch the linear movement of the pitch feed cylinder 70 Cutting link 68 for rotating the rotating body 60 to each other; Lapping machine for sphere lapping processing of the drive shaft for the hydraulic motor and pump, characterized in that comprising a. The method of claim 1, wherein the rotation drive means 20 is: A main rotary shaft 22 integrally formed at the center of the bottom surface of the turntable so as to rotate the turntable 14 and extending through the lower worktable 12; A driven pulley 23 mounted at the lower end of the main rotating shaft 22; A drive motor 24 fixedly mounted at a predetermined bottom surface of the lower worktable 12; A drive pulley 25 formed integrally with a shaft of the drive motor 24; A timing belt 26 connected between the driven pulley 23 and the driving pulley 25; Lapping machine for sphere lapping processing of the drive shaft for the hydraulic motor and pump, characterized in that comprising a. The method of claim 1, wherein the wrap processing unit 30: A flat plate structure having a slot 32 for each rotation, comprising: a wrap fixing plate 34 mounted to an upper end of the upper work platform 10; Wrap processing motor 35 is rotatably coupled to the slot 32; A labing cylinder 36 mounted on one side of an upper end of the upper work platform 10 to rotate the labing motor 35 along the slot 32; A wrap 38 fixed to the lower end of the shaft of the wrap machining motor 35 to wrap the sphere 90 of the drive shaft 40; Lapping machine for sphere lapping processing of the drive shaft for the hydraulic motor and pump, characterized in that comprising a. The method according to claim 1, In the lower structure 16, a pair of fixed stoppers 74 for limiting angular rotation angles of the rotating body are mounted at positions adjacent to the rotating body 60, and at predetermined positions on the outer diameter surface of the rotating body 60, respectively. A wrapping machine for spherical lapping processing of a drive shaft for a hydraulic motor and a pump, characterized in that the moving stopper 76 is integrally mounted to the fixed stopper 74. The method according to claim 1, Hydraulic joints and pumps, characterized in that the multi-joint three-dimensional measuring machine 82 is installed on the auxiliary work platform 80 integrally extended to the side of the lower work table 12 to measure the quality of the wrapping of the drive shaft 40 Lapping machine for sphere lapping of drive shaft.

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