KR20160026511A - Lug grinding apparatus - Google Patents

Abstract

The present invention relates to a lug grinding apparatus which cuts a lug installed at a large metal structure block and then grinds a lower part of the lug left on a surface of the block. More specifically, the present invention relates to the lug grinding apparatus which cuts the lug which completed its intrinsic function in the large metal structure or a ship made by interconnecting several unit blocks having the lug by moving the unit blocks using a crane, and then removes the lower part of the lug which is not cut to be left in the block by grinding the lower part. The present invention can obtain the effect of improving workability by being able to obtain the effect of grinding the lower part of the lug protruding from the surface of the block by moving a grinding stone vertically, horizontally, and automatically if a worker locates the lug grinding apparatus at the lower part of the lug left on the block, and can obtain the effect of being able to remove the lower part of the lug protruding from the surface of the block uniformly at an equal height to the surface of the block, regardless of working ability of the worker. The present invention can solve a problem that a painted matter coated on the block or a metal organization of the block is damaged by flame since the lower part of the lug is removed by being ground by the grinding stone.

Description

[0001] LUB GRINDING APPARATUS [0002]

The present invention relates to a lapping machine for polishing a lower end portion of a lug remaining on a surface of a block after cutting a lug installed in a large metal structure block. More specifically, a plurality of unit blocks having lugs are moved using a crane, and a lug having a function of performing a function is cut off from a ship or a large metal structure, To remove the lower end portion of the lug.

Generally, the shipbuilding process is carried out through a process of preliminarily manufacturing several unit blocks and interconnecting them by stacking them using a crane. Blocks are becoming larger and larger due to the rapid development of shipbuilding method. Therefore, when the block is manufactured, the coating process is carried out after coating is performed in the coating factory in advance.

In the mounting process, a block formed to lift or move a large block to a desired position is provided with a lug having a fastening hole for connecting a hook of a crane.

A number of lugs are welded at appropriate positions of the block. In order to withstand the load of a block to be enlarged, a heavy object having a weight of up to about 100 kg may be used.

FIG. 1 is a perspective view showing one form of a lug mounted on a block of a ship, and FIG. 2 is a side view showing flame cutting of a lug mounted on the block.

As shown in FIG. 1, generally, the lug 1 is formed with a circular fastening hole 6 so that a hook (not shown) of a crane can be inserted into a lug main body 5 arranged in a vertical direction. A reinforcing plate 7 for reinforcing the strength of the fastening hole 6 is provided on both side surfaces of the lug main body 5 at both sides of the fastening hole 6, A plurality of ribs 4 may be mounted to increase the fastening force.

The lug 1 mounted while the lug body 5 and the bottom of the rib 4 are welded to the surface of the block B as shown in Figure 2 must be removed again at block B after the loading process has ended do.

A method of cutting the lug 1 using the flame F is used so that the height h1 is left to be 15 to 30 mm from the lower end of the lug 1 welded to the block B.

After the majority of the lug 1 is cut off, a finishing process is performed to remove the lower end 5a of the lug 1 remaining in the block B through the grind, and the cut lug 1 is re- (B).

However, since the high heat of about 5,000K to 20,000K is applied to the cut part of the lug 1, the coating area of the block B is damaged or the block B and the rug There arises a problem that the metal structure of the substrate 1 is changed.

Since the lower end portion 5a of the lug 1 remaining in the block B after cutting is directly removed by a person using a grinder, the surface is unevenly cut to require a post-processing operation, have.

In addition, in order to reuse the cut lugs 1, it is necessary to re-cut the cut surfaces that are not uniformly cut, so that the height h2 of the remaining lugs 1 after the flame F is cut becomes shorter, .

In addition, conventionally, a lug cutting apparatus such as a registered patent No. 0976804 (name of lug cutting apparatus) and a registered patent No. 1310306 (name of lug cutting apparatus) were proposed. However, Is merely using a grind or a flame, and a variety of techniques are required.

Korean Patent No. 0976804 (Dec. 12, 2010) Korean Patent No. 1310306 (Dec. 12, 2013)

The present invention has been made in order to solve the problems of the prior art of a lug grinding machine. Conventionally, the lower end of a lug whose upper end is cut by a lug cutter is removed as a general grinder operated by an operator's manual work, There was a problem;

When the operator polishes the lower end of the lug by using a general polishing machine, the degree of removal of the lower end of the lug varies according to the work capacity of the worker;

In the case of removing the lower end of the lug by using the flame, there arises a problem that the coating material or the metal structure of the block applied to the block to which the lower end of the lug is connected is damaged by the flame, will be.

The present invention has been made to solve the above-

A pair of main frames spaced apart from each other in parallel; A pair of main frames, each frame having a pair of main frames, A grinding stone which is coupled to the lower end of a rotating shaft which is coupled to the moving frame in a direction perpendicular to the longitudinal direction and rotates downward and is rotatable, and is located at a portion between the pair of main frames and is movable up and down; A first spindle mounted between the movable frame and the rotary shaft and coupled to the rotary frame so that the rotary shaft rotates by the driving means so as to be rotatable and the rotary shaft can be moved up and down; An elevating means fixed to the upper portion of the moving frame and having an elevating shaft for moving up and down by a pressing force; And a second spindle coupled to the lower end of the lifting shaft and coupled to the lower portion of the lower spindle such that the upper end of the rotating shaft is rotatable.

In the lug grinder according to the present invention as described above, when the worker places the lug grinder at the lower end of the lug remaining on the block, the grinding stone automatically moves vertically and horizontally, and the lower end of the lug protruding from the surface of the block can be polished The effect of improving the workability can be obtained;

The lower end of the lug protruding from the surface of the block can be uniformly removed at the same height as the surface of the block irrespective of the work capability of the operator;

Since the lower end of the lug is polished and removed, it is possible to minimize the problem of damaging the metal structure of the paint or block applied to the block due to the flame.

1 is a perspective view showing a form of a lug mounted on a block of a ship;
FIGS. 2 (a) to 2 (b) are a side view and a plan view showing flame cutting of a lug mounted on a block;
3 is a perspective view showing a lag polisher according to a preferred embodiment of the present invention.
4 is a perspective view showing a state in which an upper part of a moving frame of a lug grinder according to a preferred embodiment of the present invention is seen.
5 is a front sectional view showing a lug grinder according to a preferred embodiment of the present invention.
6 is a side view showing a lag polisher according to a preferred embodiment of the present invention.
7 is a front sectional view and partial detail view showing a second spindle and a secondary spindle of a lug grinder according to a preferred embodiment of the present invention.
8 to 9 are a front sectional view and a partial detailed view showing an operating state of the elevating means of the lag polisher according to the preferred embodiment of the present invention.
10 is a plan view showing horizontal movement of a moving frame of a lug grinder according to a preferred embodiment of the present invention.
11 is a side cross-sectional view showing moving means of a lag polisher according to a preferred embodiment of the present invention.

The present invention relates to a lapping machine for polishing a lower end portion of a lug remaining on a surface of a block after cutting a lug provided on a large metal structure block, 10); A moving frame (20) fastened to the pair of main frames (10) so that both ends thereof are movable in a horizontal direction; And is coupled to the lower end of the rotating shaft 80 which is coupled to the movable frame 20 in the longitudinal direction downwardly so as to be vertically rotated and rotates and is positioned at a portion between the pair of main frames 10 to be movable up and down A grinding stone 30 formed; A rotary shaft 80 mounted between the movable frame 20 and the rotary shaft 80 is connected to the rotary frame 20 so as to be rotatable by the driving means 90, A first spindle 40 configured to move up and down; An elevating means (50) fixed to a portion of the movable frame (20) extending upwardly and having an elevating shaft (51) moved up and down by a pressing force; And a second spindle 60 coupled to a lower end of the lifting shaft 51 and coupled to the lower portion of the lower spindle 60 so that the upper end of the rotating shaft 80 is rotatable.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

3, the following moving frame 20 is seated on the main frame 10 so that the upper surface of the block can be moved horizontally And serves as a support.

That is, the main frame 10 is a bar-shaped frame having a longer length than the body of the lug, and remains between the pair of main frames 10 spaced apart from each other in a protruding form on the surface of the block The lower end of the lug is positioned and the grinding stone 30 is placed on the upper part of the lower end of the lug so that the grinding stone 30 fastened to the moving frame 20 in the longitudinal direction of the lug body is horizontally movable.

One or more magnets 11 having a predetermined height may be mounted on the lower portion of the main frame 10 so that the main frame 10 can be fixed to the upper portion of the block by the magnetic force of the magnet 11.

6, the magnets 11 are attached to both ends of the lower portions of the pair of main frames 10 to form a predetermined height, and before the operation (when the grinding stone 30 is lifted) It is preferable that the grinding stone 30 is located at a higher point than the lower end and the entire columnar shape is not made up of the magnet 11 and the lower end of the columnar frame may be composed of the magnet 11 have.

In addition, as shown in FIG. 11, the main frame 10 may further include a moving means 12 having a plurality of wheels mounted thereon.

That is, the moving means 12 includes a front wheel 12b provided at one side of a front rotation guide 12a, which is centered to be rotatable at a portion corresponding to the front of the main frame 10; A rear wheel 12d provided at one side of a rear rotation guide 12c which is rotatably mounted at a portion corresponding to the rear of the main frame 10; An auxiliary guide 12e for interconnecting the front rotation guide 12a and the rear rotation guide 12c; And a handle 12f extending from the other side of the front rotation guide 12a or the rear rotation guide 12c. Both ends of the auxiliary guide 12e are connected to the front rotation guide 12a (12) is configured to be rotatable on the other side of each rotation guide with reference to each rotation center point of the rear rotation guide (12c). The moving means (12) And is configured to be symmetrical about the main frame 10 of the pair.

Specifically, the front rotation guide 12a and the rear rotation guide 12c are provided at positions corresponding to the front portion and the rear portion of the main frame 10, respectively, at portions corresponding to the central portions of the lengths of the rotation guides. So that a front wheel 12b and a rear wheel 12d are provided on one side.

The front rotation guide 12a and the rear rotation guide 12c are bent around the center of rotation so that the angle between the following knob 12f and the wheel is appropriately adjusted so that the rotation of the knob 12f It is possible to control whether the wheel is unfolded or folded according to the degree.

The auxiliary guide 12e is configured to interconnect the forward rotation guide 12a and the rear rotation guide 12c and is configured to transmit the rotational force between the forward rotation guide 12a and the rear rotation guide 12c to each other .

That is, when the operator rotates the handle 12f which is extended from the other side of the front rotation guide 12a, the front wheel 12b provided at one side of the front rotation guide 12a rotates toward the block and contacts the block, The auxiliary guide 12e having one side fixed to the other side of the front rotation guide 12a rotates the rear rotation guide 12c in the same direction as the front rotation guide 12a to rotate the rear wheel 12d toward the block side do.

It is preferable that the moving means 12 configured as described above is configured as a pair and is configured to be symmetrical about a pair of main frames 10. The handle 12f includes a pair of forward rotation guides 12a, Or the pair of rear rotation guides 12c to each other.

4, the movable frame 20 is coupled to the pair of main frames 10 such that both ends thereof are movable in the horizontal direction. The movable frame 20 is supported by the grinding stone 30 in a state of supporting the grinding stone 30, So that it can be horizontally moved in the longitudinal direction of the main frame 10.

That is, a rail 21 system is configured between the main frame 10 and the moving frame 20 so that the moving frame 20 can move in the longitudinal direction of the main frame 10, The rail 21 may be connected to the rail block 22 to be coupled with the rail 21. The LM guide may be a conventional rail 21 system.

In addition, a bearing system may be provided between the main frame 10 and the moving frame 20 in place of the rail 21 system, and the bearing system may use a general technique.

5, when the main frame 10 is moved in the longitudinal direction of the main frame 10, the main frame 10 is moved in the horizontal direction, It can be realized by the pressing means attached to the frame 10 and the moving frame 20. [

That is, the pressurizing means may be of the same type as the hydraulic cylinder 52, the pneumatic cylinder 52, or the rodless air cylinder 13, and more particularly, it is preferable to use the rodless air cylinder 13 , It is obvious that the longitudinal direction of the cylinder 52 should be the same as the longitudinal direction of the main frame 10.

3 to 4, the movable frame 20 is formed in a plate shape or a lattice shape. At both ends of the movable frame 20, a pair of main frames 10, each constituted by the system of the rail 21, Respectively. At this time, the rodless air cylinder 13 for providing a moving force to the moving frame 20 is also fastened to the main frame 10 at one side and the moving frame 20 is fastened at the other side.

The intermediate portion and the upper portion of the moving frame 20 extending upward from the lower portion of the plate-like or lattice-like shape are formed by the following first spindle 40, elevating means 50 and second spindle 60 as shown in Figs. Width, and width so as to be mounted on the movable frame 20, and the shape of the movable frame 20 can be variously changed according to the judgment of a person skilled in the art.

In addition, the movable frame 20 is connected to the following grinding stone 30 so that a rotary shaft 80 for rotating the grinding stone 30 can be passed therethrough, and the first spindle 30, which rotatably supports the rotary shaft 80, A through hole may be provided in a plate-like or lattice-shaped lower portion so that the movable frame 40 can be positioned between the movable frame 20 and the rotary shaft 80.

The grinding stone 30 is fastened to the lower end of the rotating shaft 80 which is coupled to the moving frame 20 so that the longitudinal direction thereof is vertically downwardly rotated and rotates, And the lower end portion of the lug remaining on the surface of the block is polished and removed.

The rotating shaft 80 rotates by means of the following driving means 90 such as a motor so that the rotating force of the driving means 90 is transmitted to the grinding stone 30, . Further, the rotating shaft 80 moves up and down so that the grinding stone 30 can be moved up and down by rotation, and a detailed description thereof will be given below.

The grinding stone 30 may be constructed of a rock material, a metal material, or a hybrid material of a rock and a metal, which is configured to rotate and polish the lower end of the lug remaining in the block. It will be appreciated that a fastener for fastening the rotary shaft 80 to the upper end of the grinding stone 30 may be provided for fastening the grinding stone 30 to the lower end of the rotary shaft 80.

5, the grinding stone 30 is located in a space between the pair of main frames 10, and is lowered while the lower end of the lug is positioned below the grinding stone 30, and the lower end of the lug is polished , The entire lower end of the lug having a predetermined length moving in the longitudinal direction of the main frame 10 can be polished and removed.

The first spindle 40 is mounted between the moving frame 20 and the rotating shaft 80 and rotates the rotating shaft 80 rotated by the driving means 90 to be rotatable on the moving frame 20 , And the movable frame 20 and the rotary shaft 80 are connected to each other to support the rotating rotary shaft 80 so that the rotary shaft 80 can move up and down.

That is, the first spindle 40 may have any structure as long as it can move up and down while rotating the rotary shaft 80. However, as shown in FIG. 5, the first spindle 40 includes a vertical hollow 41a at the center, A first housing (41) penetrating the moving frame (20) in a vertical direction and fastened to the moving frame (20); The upper portion of the hollow portion 42a of the movable frame 20 is coupled to a driving portion of the movable frame 20. The upper portion of the hollow portion 42a is connected to the hollow portion 41a of the first housing 41, And an outer circumference of the hollow 42a of the pulley 42 and an outer circumference of the rotation axis 80 are connected to each other in a vertical direction So that the rotary shaft 80 can be configured to be movable up and down with respect to the hollow 42a of the pulley 42. [

Specifically, the first housing 41 has a vertical hollow 41a at its center, and is configured to be vertically penetrated and fastened to the movable frame 20, 20 through the through-holes 41a.

In the case where the movable frame 20 is formed in a plate shape, the movable frame 20 is provided with a through hole provided in the movable frame 20, When the movable frame 20 is formed in a lattice shape by the connection of a plurality of frames, the first housing 41 is inserted into the open space corresponding to the space between the frame and the frame and is fastened .

The pulley 42 has a vertical hollow 42a at the center and a lower portion rotatably inwardly engaged with the hollow 41a of the first housing 41. The upper portion of the pulley 42 has a constant And is transmitted to the rotary shaft 80 by receiving the rotational force of the driving means 90. The rotational force of the driving means 90 is transmitted to the rotary shaft 80. [

In other words, a rotating connector such as a bearing is provided in the hollow 41a of the first housing 41 so that the pulley 42 inserted into the hollow 41a can be easily rotated. The rotation shaft 80 is passed through the hollow 42a and receives the rotational force of the pulley 42 rotated by the driving means 90. [

5, the lower portion of the pulley 42 is internally fastened to the hollow 41a of the first housing 41 so as to be rotatable, and the upper portion of the pulley 42 can be fitted with a belt or a chain And is configured to be able to receive the rotational force of the driving means 90 such as a motor.

In addition, concave and convex portions corresponding to each other are formed in the vertical direction (not shown) corresponding to the inner periphery of the hollow 42a of the pulley 42 and the outer periphery of the rotary shaft 80, And can be moved up and down with reference to the guide shaft 42a.

That is, the rotary shaft 80 according to the present invention should be configured to be vertically movable up and down while being rotated by the driving means 90. The hollow shaft 42a of the pulley 42 and the rotary shaft 80 The concavity and convexity formed allows the rotary shaft 80 to move up and down in the hollow 42a of the pulley 42 to form an engagement of the rotary shaft 80 with respect to the rotation of the pulley 42, So that it can be transmitted to the rotating shaft (80).

The connection between the hollow 41a of the first housing 41 and the lower portion of the pulley 42 may be any structure as long as the pulley 42 is supported and rotatable within the hollow 41a, The hollow 41a of the first housing 41 is provided with bearing grooves 41b and 41c on the upper and lower portions thereof and a thrust ball bearing is mounted on the upper bearing groove 41b, It is preferable that deep groove ball bearings are mounted on the bearing 41c.

That is, the bearing grooves 41b and 41c are configured to allow the bearing to be fitted in the housing, and the thrust ball bearings mounted on the bearing grooves 41b on the upper portion of the hollow 41a, The pulley 42 can be easily rotated within the hollow 41a of the first housing 41 to support the pressing force transmitted to the rotating shaft 80 moving up and down in the hollow 42a of the pulley 42, So as to support the pressing force.

The deep groove ball bearing mounted on the bearing groove 41c under the hollow 41a of the first housing 41 is rotated by the pulley 42 against the longitudinal direction of the hollow 41a of the first housing 41, It is effective to prevent such a problem.

The elevating means 50 includes an elevating shaft 51 fixed to a portion extending upwardly from the moving frame 20 and moving up and down by a pressing force. The elevating means 51 includes an elevating shaft 51 To the rotary shaft 80 so that the grinding stone 30 connected to the lower end of the rotary shaft 80 is moved up and down.

That is, the elevating means (50) has a structure in which a certain portion of the housing is fixedly fastened to a predetermined portion corresponding to the middle portion or the upper portion of the moving frame (20) It may be configured in any form as long as it can move up and down in the vertical direction.

More specifically, the lifting means (50) includes a cylinder (52) fixedly connected to the upper portion of the moving frame (20) and having an inner space; A piston 54 formed in an inner space of the cylinder 52 in a horizontal direction and separated from the inner space into an upper space 53a and a lower space 53b by closely contacting the inner space; And an elevation shaft 51 vertically penetrating the cylinder 52 and being moved up and down by a pressing force generated by the upward and downward movement of the piston 54. The cylinder 52 is provided with an upper space 53a Out port 55 communicating with the air inlet / outlet port 55 is preferably formed.

Specifically, the cylinder 52 is fixed to a portion extending upwardly from the moving frame 20, and has an internal space, and is configured to form a pneumatic or hydraulic pressure.

In addition, the piston (54) contained in the internal space of the cylinder (52) forms an area in the horizontal direction in the inner space and is intimately contacted to divide the internal space into the upper space (53a) and the lower space 53a or the lower space 53b by a pneumatic or hydraulic pressure.

The upper portion of the cylinder 52 is formed with an air inlet / outlet 55 communicating with the upper space 53a. The piston 54 is connected to the upper space 53a by the pressure of air (or oil) injected or drawn into the upper space 53a. So that it can be pushed down to the bottom of the inner space or pushed up.

The lower portion of the cylinder 52 is further provided with an oil injection port 56 communicating with the lower space 53b so that the piston 54 can be moved It is possible to realize the effect of preventing the piston 54 from descending or rising abruptly by allowing the space 53b to maintain a constant pressure. When the piston 54 descends to the lowermost portion of the internal space, So that a pressing force capable of raising the lower space 53b can be applied again.

The lifting shaft 51 vertically penetrates the cylinder 52 and is coupled to the piston 54 so that the lifting shaft 51 is moved up and down by a pressing force generated by the lifting movement of the piston 54. That is, the lifting shaft 51 has a length in a direction (vertical direction) corresponding to the moving direction of the piston 54 and is fastened to the upper and lower portions of the piston 54 or passes through the piston 54 in the vertical direction So as to be fastened.

The elevating movement of the elevating shaft 51 by the elevating means 50 will be described in detail as follows.

That is, when the piston 54 is positioned above the internal space of the cylinder 52 and the constant air pressure is constantly applied to the air injection / extraction port 55, the upper space 53a is expanded to the piston 54 And the lifting shaft 51 connected to the piston 54 move down. At this time, the lower space 53b is reduced in accordance with the expansion of the upper space 53a so that the oil contained in the lower space 53b is gradually drawn out to the oil injection / outflow port 56 and the lifting shaft 51 is lowered naturally .

On the contrary, when the lower end of the lug is completely removed, the lower space 53b is filled with oil through the oil inlet / outlet 56, and the piston 54 is moved upward by the raised oil pressure in the lower space 53b. And the lifting shaft 51 also ascends by the upward movement of the piston 54. As shown in Fig. At this time, the air that has been filled in the upper space 53a is drawn out through the air injection /

The upper end of the second spindle 60 is coupled to the lower end of the lifting shaft 51 and the upper end of the rotating shaft 80 is rotatably coupled to the lower end of the second spindle 60, 51 to the rotary shaft 80 and at the same time ensures the rotatability of the rotary shaft 80. In addition,

That is, the upper portion of the second spindle 60 is coupled to the lower end of the lifting shaft 51 moving up and down so that the second spindle 60 can be lifted and lowered in accordance with the lifting movement of the lifting shaft 51, The lower portion of the second spindle 60 is rotatably coupled to the upper end of the rotating shaft 80 so that the rotating force of the rotating shaft 80 is not transmitted to the lifting shaft 51.

More specifically, the upper portion of the second spindle 60 is fastened to the lower end of the lifting shaft 51, and has an inner space 62 at the center, and the lower portion of the second spindle 60 is in an open state communicating with the inner space 62 A second housing (61) constituted by the first housing And a rotating block 63 that is coupled to one or more thrust ball bearings mounted in the inner space 62 of the second housing 61 and rotatable. ) Can be fastened to each other.

The upper portion of the second housing 61 is fixedly coupled to the lower end of the lifting shaft 51 so that the entire second housing 61 can move up and down according to the lifting movement of the lifting shaft 51, An inner space 62 is provided so that the rotating block 63 can be rotatably fastened in the inner space 62. [

The lower part of the second housing 61 is open so as to communicate with the inner space 62 so that the upper end of the rotating shaft 80 is drawn into the inner space of the second housing 61, Or the lower portion of the rotating block 63 may be pulled out of the inner space 62 to be fastened to the upper end of the rotating shaft 80. [

The rotating block 63 is coupled to one or more thrust ball bearings mounted in the inner space 62 of the second housing 61 and is rotated by the thrust ball bearing. The rotation of the rotary block 80 coupled to the lower portion of the rotary block 63 is achieved only by the rotation block 63 and is transmitted from the upper portion of the second housing 61 To the rotating rotary shaft (80) rotating by the elevating shaft (51).

In summary, the grinding stone 30 is positioned between the pair of main frames 10, and the first spindle 40, which rotatably supports the grinding stone 30, is movable horizontally to the main frame 10 The lower part of the rotating shaft 80 is rotatably supported by the first frame 40 and the upper part of the rotating shaft 80 is supported by the first frame 20, Is rotatably supported on a second spindle (60) located on the upper side of the first spindle (40). At this time, the elevating means 50 is fixedly fastened to a portion of the moving frame 20 corresponding to the upper portion of the rotary shaft 80, and the elevating shaft 51 of the elevating means 50 is fastened to the second spindle 60 So that the rotary shaft 80 can be moved up and down.

In this connection, the rotary shaft 80 has a structure in which the auxiliary spindle 70 is further fastened between the first spindle 40 and the second spindle 60, and the upper portion of the auxiliary spindle 70 is moved The upper portion of the rotary shaft 80 is rotatably coupled to the upper portion of the frame 20 so as to be movable up and down.

That is, the auxiliary spindle 70 is formed between the first spindle 40 and the second spindle 60 and has an effect of rotatably supporting the upper end of the rotary shaft 80. At this time, a hollow 73 is provided between the auxiliary spindle 70 and the rotary shaft 80, and a rotary connector such as a bearing is mounted on the hollow 73.

More specifically, the auxiliary spindle 70 includes a movable frame 20 and a movable frame 20. The auxiliary spindle 70 includes a movable frame 20, a movable frame 20, The guide bar 71 described above; And an auxiliary housing (72) having a hollow (73) at the center in the vertical direction in which a part of an upper end of the rotary shaft (80) is rotatably fastened and an upper portion fixedly fastened to a lower portion of the guide bar Configuration can be performed.

That is, the guide holder 23 having the through-hole has a structure in which the guide bar 71 is supported so as not to be shaken during the vertical movement of the guide bar 71, In the vertical direction.

The guide bar 71 is configured to move up and down in the through hole corresponding to the through hole of the guide holder 23 so that the auxiliary housing 72, to which the lower portion of the guide bar 71 is fixed, And supports the auxiliary housing 72 when the lifting / lowering movement of the auxiliary housing 72 is performed.

In addition, the auxiliary housing 72 has a vertical hollow 73 at the center where the upper end of the rotary shaft 80 is rotatably fastened, and an upper portion of the auxiliary housing 72 is fastened to the lower portion of the guide bar 71 , And the rotary shaft (80) is rotatably supported through the hollow (73).

At this time, the hollow 73 of the auxiliary housing 72 is provided with a rotating connector such as a bearing, so that the interference between the rotating shaft 80 and the inner surface of the hollow 73 can be minimized.

In addition, according to the present invention, when the lower end of the lug remaining on the surface of the block is polished by the grinding stone 30 and the lower end of the projected lug has the same phase as the surface of the block, have.

In accordance with the above, the present invention is characterized in that the inner space 31 is formed in the grinding stone 30, the lower part of the inner space 31 is opened, and air is continuously injected into the inner space 31 The polishing time of the grinding stone 30 can be stopped by measuring the time when the amount of air discharged between the inner space 31 and the surface of the block is minimized.

8, the inner diameter of the hollow 73 is formed to be larger than the outer diameter of the rotary shaft 80, and the through hole, through which the rotary shaft 80 can pass, An inner hole that is divided into an upper hole 72b and a lower hole 72c by the second hole 72d; A bearing groove (72e) provided at each of both ends of the inner hole and in which bearings to be coupled so that the rotary shaft (80) is rotatable are internally fixed; An air inlet (72f) formed at the side of the auxiliary housing (72) and communicating with the lower hole (72c); And an air outlet port 72g formed on the side of the auxiliary housing 72 and communicating with the upper hole 72b. The rotary shaft 80 is connected to the upper hole 72b and the lower hole 72c The grinding stone 30 is connected to the inline 81 provided at the lower end of the rotary shaft 80 and is connected to the inner space 81 having the lower open state 31) can be configured.

That is, the auxiliary housing 72 is configured to be able to compare the pressure of the supplied air with the pressure of the drawn air when the auxiliary housing 72 is not rotated.

The inner hole is formed such that the inner diameter of the hollow 73 of the auxiliary housing 72 is larger than the outer diameter of the rotary shaft 80. A through hole through which the rotary shaft 80 can pass is defined by a partition wall 72d, And is configured to isolate the air supplied from the air inlet port 72f and the air drawn out to the air outlet port 72g from each other.

In this case, it is preferable that each of the two ends of the inner hole is provided with a bearing groove 72e through which the bearing for allowing the rotation shaft 80 to smoothly rotate through the auxiliary housing 72 is inserted and fixed.

The air contained in the upper holes 72b and the lower holes 72c is also exhausted from both ends of the upper holes 72b and both ends of the lower holes 72c by the rotation of the rotary shaft 80 It is preferable that the sealing member 74 be mounted.

The upper hole 72b and the lower hole 72c are configured to communicate with one of the air inlet 72f and the air outlet 72g.

In addition, a pair of inline 81, which is respectively communicated with the upper hole 72b and the lower hole 72c, is provided at the lower end of the rotary shaft 80. The grindstone 30 is installed at the lower end of the rotary shaft 80 An inner space 31 communicating with the in-line 81 and having a lower open state is formed.

The air injected into the lower holes 72c and the upper holes 72b through the air inlet 72f is communicated with the lower holes 72c so as to communicate with the lower holes 72c, Is transferred to the lower end of the rotary shaft (80) through any one of the inlines (81) provided in the rotary shaft (80) and transferred to the inner space (31) of the abrasive stone (30).

If the lower end of the lug is left protruding from the surface of the block, then the air contained in the inner space 31 is formed between the lower part of the grinding stone 30 formed by the height of the lower end of the lug and the surface of the block The amount of air to be transferred to the other inline 81 in which the distal end is positioned at the lower end of the rotary shaft 80 so as to communicate with the inner space 31 is reduced.

Thereafter, when the lower end of the lug is polished by the grinding stone 30 and removed to the same extent as the surface of the block, the gap formed between the lower portion of the grinding stone 30 and the surface of the block is narrowed, The amount of air transferred to the other inline 81 in which the end is positioned at the lower end of the rotary shaft 80 so as to communicate with the inner space 31 is transferred to the inner space 31 It will increase to a similar amount.

The air conveyed to the other inline 81 provided on the rotary shaft 80 is then transferred to the upper hole 72b of the auxiliary housing 72 and is guided to the outside of the auxiliary housing 72 via the air outlet 72g. Respectively.

That is, on the basis of the above-described conveyance of air, the present invention first checks the pressure of the air injected into the air inlet 72f, checks the pressure of the air discharged to the air outlet 72g, Thus, it is possible to check the degree of polishing of the lower end of the lug, and to determine whether the lower edge of the lug is completely removed, and to determine whether the grinding stone 30 is lowered or not.

Hereinafter, the operation sequence of the lapping machine according to the present invention will be described.

First, the upper end of the lug is cut using a lug cutter, and then the lug abrasive machine according to the present invention is placed on the upper part of the lower end of the lug remaining on the surface of the block.

At this time, the operator adjusts the wheel mounted on the moving means 12 of the lug grinding machine so as to touch the surface of the block, moves the lug grinder to the lower end of the lug, places the lower end of the lug between the pair of main frames 10 Thereafter, the handle 12f is pulled so that the wheel is folded so that the magnet 11 mounted on the lower portion of the main frame 10 comes into contact with the surface of the block, thereby fixing the lug grinder to the block.

Thereafter, the motor is operated to rotate the grinding stone 30 connected to the rotary shaft 80, and air is supplied to the upper space 53a of the elevating means 50 through the air inlet / outlet 55 so that the air can maintain a constant pressure. The one-way check valve connected to the oil injection / extraction port 56 communicating with the lower space 53b is opened to release the pressure due to the reduction of the lower space 53b due to the expansion of the upper space 53a And the oil in the lower space 53b is drawn out.

As a result, the rotating shaft 80 connected to the lifting shaft 51 of the lifting means 50 via the second spindle 60 rotates and descends downward by the pressing force of the lifting shaft 51, The grinding stone 30, which is fastened to the lower end of the lug, abrades the lower end of the lug from the upper part and descends downward.

At this time, when the lower end of the lug has an area wider than the lower area of the grinding stone 30, the operator moves the movable frame 20 horizontally on the main frame 10 and moves the grinding stone 30 to the lower side And operates the lease air cylinder 13.

The operator also injects air of a predetermined pressure into the air inlet 72f provided in the auxiliary housing 72 of the auxiliary spindle 70 and checks the pressure of the air drawn out to the air outlet 72g with a pressure check gauge, And the polishing operation is stopped when the outflow pressure of the air reaches about the same as the injection pressure.

That is, when the polishing is completed so that the lower end of the lug has the same phase as the surface of the block, the amount of air that flows out between the lower portion of the grinding stone 30 and the surface of the block becomes insignificant,

Thereafter, the operator injects the oil into the lower space 53b through the oil injection / extraction port 56 connected to the lower space 53b of the elevating means 50 and supplies the oil to the lower space 53b through the elevation shaft 51, the second spindle 60, (80) and the grinding stone (30).

At this time, the rotation speed of the grinding stone 30, the air injection pressure and the oil drawing pressure of the elevating means 50, the operation of the rodless air cylinder 13, the injection pressure of the air injected into the auxiliary housing 72, And whether or not the polishing operation is stopped can be automatically performed by a general control device and a control program.

Then, when a certain portion or one lug lower end removing operation is completed, the operator rotates the handle 12f of the moving means 12 to adjust the wheel so as to touch the surface of the block so that the magnet 11 is separated from the block Then move the lug grinder to the required position.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

10: Main frame 11: Magnet
12: moving means 12a: forward rotation guide
12b: front wheel 12c: rearward rotation guide
12d: Rear wheel 12e: Auxiliary guide
12f: handle 13: rodless air cylinder
20: moving frame 21: rail
22: rail block 23: guide holder
30: Grinding stone 31: Inner space
40: first spindle 41: first housing
41a: hollow 41b, 41c: bearing groove
42: pulley 42a: hollow
50: elevating means 51: elevating shaft
52: cylinder 53a: upper space
53b: lower space 54: piston
55: air injection / extraction port 56: oil injection / extraction port
60: second spindle 61: second housing
62: inner space 63: rotating block
70: auxiliary spindle 71: guide bar
72: auxiliary housing 72b: upper hole
72c: lower hole 72d: partition wall
72e: bearing groove 72f: air inlet port
72g: air outlet 73: hollow
74: sealing member 80:
81: inline 90: driving means

Claims (10)

A pair of main frames 10 spaced apart from each other in parallel;
A moving frame (20) fastened to the pair of main frames (10) so that both ends thereof are movable in a horizontal direction;
And is coupled to the lower end of the rotating shaft 80 which is coupled to the movable frame 20 in the longitudinal direction downwardly so as to be vertically rotated and rotates and is positioned at a portion between the pair of main frames 10 to be movable up and down A grinding stone 30 formed;
A rotary shaft 80 mounted between the movable frame 20 and the rotary shaft 80 is connected to the rotary frame 20 so as to be rotatable by the driving means 90, A first spindle 40 configured to move up and down;
An elevating means (50) fixed to a portion of the movable frame (20) extending upwardly and having an elevating shaft (51) moved up and down by a pressing force;
And a second spindle (60) having an upper portion fastened to the lower end of the lifting shaft (51) and a lower spindle (60) fastened to the lower portion so that the upper end of the rotating shaft (80) is rotatable.
The method according to claim 1,
The first spindle (40)
A first housing (41) having a hollow (41a) in a vertical direction at the center thereof and passing through the moving frame (20) in a vertical direction and fastened to the moving frame (20);
The upper portion of the hollow portion 42a of the movable frame 20 is coupled to a driving portion of the movable frame 20. The upper portion of the hollow portion 42a is connected to the hollow portion 41a of the first housing 41, And a pulley (42) that is rotatable by receiving a rotational force by the rotation shaft (90)
The inner circumference of the hollow 42a of the pulley 42 and the outer circumference of the rotary shaft 80 are formed to have vertical irregularities corresponding to each other so that the hollow 42a of the pulley 42 And is movable up and down with reference to the reference position.
3. The method of claim 2,
The hollow (41a) of the first housing (41) has bearing grooves (41b, 41c) on the upper and lower portions, respectively,
Wherein a thrust ball bearing is mounted on the upper bearing groove (41b), and a deep groove ball bearing is mounted on the lower bearing groove (41c).
The method according to claim 1,
The elevating means (50)
A cylinder 52 fixedly connected to the upper portion of the moving frame 20 and having an inner space;
A piston 54 formed in an inner space of the cylinder 52 in a horizontal direction and separated from the inner space into an upper space 53a and a lower space 53b by closely contacting the inner space;
And an elevating shaft 51 vertically penetrating the cylinder 52 and being moved up and down by a pressing force generated by the movement of the piston 54,
Wherein the cylinder (52) is provided with an air inlet / outlet port (55) communicating with the upper space (53a).
5. The method of claim 4,
The cylinder (52)
And an oil infusion / outflow port (56) communicating with the lower space (53b).
6. The method of claim 5,
The elevating means (50)
The upper space 53a is expanded by the air pressure applied to the air injection and extraction port 55 so that the lifting shaft 51 connected to the piston 54 and the piston 54 can move down, So that the oil contained in the lower space (53b) is drawn out to the oil infusion / outflow port (56) in response to expansion of the lower space (53b).
The method according to claim 1,
The second spindle (60)
A second housing 61 having an upper portion coupled to a lower end of the lifting shaft 51 and having an inner space 62 at the center and a lower portion communicating with the inner space 62;
And a rotation block (63) coupled to at least one thrust ball bearing mounted in an internal space (62) of the second housing (61)
And the upper end of the rotating shaft (80) is fastened to the lower portion of the rotating block (63).
The method according to claim 1,
The rotary shaft (80)
The auxiliary spindle 70 is further fastened between the first spindle 40 and the second spindle 60,
The upper portion of the auxiliary spindle 70 is coupled to the upper portion of the movable frame 20 so as to be movable up and down, and the lower portion of the auxiliary spindle 70 is rotatably coupled to a portion of the upper end of the rotary shaft 80 Lug grinder.
9. The method of claim 8,
The auxiliary spindle (70)
At least one guide bar (71) fitted in a through hole of a guide holder (23) provided at an upper portion of the movable frame (20) so as to be movable up and down;
And an auxiliary housing (72) having a vertical hollow (73) at the center thereof to which the upper end of the rotary shaft (80) is rotatably fastened and an upper portion fixedly fastened to the lower portion of the guide bar (71) Wherein the lug grinding machine comprises a lug grinder.
9. The method of claim 8,
The auxiliary housing (72)
The hollow 73 is formed to have an inner diameter larger than the outer diameter of the rotary shaft 80. A through hole through which the rotary shaft 80 can pass is formed by a partition wall 72d formed in the horizontal direction, (72c);
A bearing groove (72e) provided at each of both ends of the inner hole and in which bearings to be coupled so that the rotary shaft (80) is rotatable are internally fixed;
An air inlet (72f) formed at the side of the auxiliary housing (72) and communicating with the lower hole (72c);
And an air outlet (72g) formed at the side of the auxiliary housing (72) and communicating with the upper hole (72b)
The rotary shaft 80 is provided with a pair of inlines 81 which are respectively communicated with the upper holes 72b and the lower holes 72c up to the lower end,
Wherein the grinding stone (30) is in communication with the inline (81) provided at the lower end of the rotary shaft (80) and constitutes an internal space (31) having a lower open state.

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