KR100868376B1 - Ball retainer for high precision and a method of making it - Google Patents

Abstract

The present invention relates to a high-precision ball retainer and a method for manufacturing the same used for various purposes in automated machines and industrial machines or molds,

More specifically, a plurality of balls for installing balls using a metal sheet are formed by press mold work, and the sheets are rolled into a cylindrical shape, and then assembled in sequence. The present invention relates to a high-precision ball retainer capable of assembly and mass production, and a method of manufacturing the same.

The present invention is connected to the inner surface of the inner surface of the sheet 21, rolled in a circular shape and has an inner diameter ring 20 having an inner diameter ball 22 at a predetermined interval therein;

A core ring (30) assembled outside the inner ring (20) and connected in a circular shape at a connection surface (30a) of the core sheet (31) and having a core ball (32) therein at a predetermined interval therein;

The ball 12 is inserted into the inner diameter ball 22 and the core ball 32 and is rolled in a circular shape at the connecting surface 46 of the outer diameter sheet 42 and has an outer diameter ball 43 therein at a predetermined interval therein. The outer ring 30 is coupled to the ball retainer 10 is characterized in that the configuration.

Metal seat, retainer, ball, outer ring, core ring, inner ring

Description

Ball retainer for high precision and a method of making it}

1 is a perspective view of a bonded state showing a preferred embodiment of the present invention

2 is an expanded front view of a sheet for processing a ring of the present invention;

Figure 3 is a front view of a state of processing the sheet of the present invention rolled up into a ring

4 is an expanded front view of a seat for assembling the ring of the present invention;

5 is an assembled state plan view of the ball retainer of the present invention;

Figure 6 is a cross-sectional view of the state installed the ball, which is the main part of the present invention

7 is an assembled state plan view of the outer diameter ring of the present invention

8 is an exploded perspective view of FIG. 4 of the present invention;

9 is a plan view of a completed state for the ball retainer of the present invention;

10 is a cross-sectional view of the connected state for the main part of the present invention.

11 is a plan view of a completed state showing another embodiment of the present invention;

[Description of Symbols for Main Parts of Drawing]

10 ball retainer 11 shaft insertion hole

12: ball 20: inner ring

21: inner diameter sheet 22: inner diameter hole

23, 44: fixing protrusion 24. 33. 45: assembly groove

25, 30a, 46: connection surface 30: coring

31: core sheet 40, 41: outer ring

42: outer diameter sheet 43: outer diameter hole

Patent No. 665320 (2007. 01. 09. Announcement, Name: High Precision Groove Linear Bushing Shaft)

Patent No. 668200 (January 11, 2007, Name: High Precision Ball Retainer and Manufacturing Method thereof)

The present invention relates to a high-precision ball retainer and a method for manufacturing the same used for various purposes in automated machines and industrial machines or molds,

More specifically, a plurality of balls for installing balls by using a metal sheet are formed by press mold work, and then rolled into a cylindrical shape, which are sequentially assembled, and then unevenly formed at the top and bottom ends thereof. The present invention relates to a high-precision ball retainer and a method of manufacturing the same, which enables solid assembly.

In general, a die set used in a press die is provided such that a die holder is installed at a lower side and a punch holder is installed at an upper side thereof so that the die holder and the punch holder move up and down with each other.

Korean Patent Publication No. 2003-39218 (published on May 17, 2003) filed by the present applicant has a guide post, which is a solid cylindrical body, formed on an upper surface of a die holder provided at a lower side thereof, and a guide of a punch holder disposed at an upper portion thereof. A guide bush which is a hollow cylindrical body having an inner diameter larger than the outer diameter of the guide post is formed at a position corresponding to the post, and a compression spring is inclined at the lower half of the outer circumferential surface of the guide post. In the press die set is configured to guide the up and down movement of the die holder and the punch holder by inserting a plurality of bearings on the outer peripheral surface,

The bearing is a roll bearing in which a plurality of rolls are connected by retainers, wherein the roll is a cylindrical body in which the middle portion is concave in the longitudinal direction and the front and rear portions are convex, and the radius of curvature of the middle portion of the roll is the outer peripheral surface of the guide post. It is equal to the radius of curvature of, the radius of curvature of the curve connecting the front portion and the rear portion of the roll is characterized in that the same as the radius of curvature of the inner circumferential surface of the guide bush.

However, this conventional die set is formed to form the inside and outside of the roll along the shape of the guide bush and the guide post to increase the life, but compared to the increase in life, the structure of the roll is complicated to increase the processing time and equipment Due to the high cost, it was not popular because of high consumption of productivity and cost.

In addition, the die set for a mold of the invention patent application No. 10-2005-3282 (filed on Jan. 13, 2005), which is filed by the present applicant, has a ball in the axial direction in which the ball of the ball bearing is installed at the outer diameter of the guide post in the general die set. The ball guide groove is formed to be in contact with the face,

The ball guide groove is formed to be in contact with the ball in the axial direction of the ball installed in the inner diameter of the guide bush.

The die set for dies has a surface contact between the outer diameter of the ball and the inner diameter of the guide bush installed on both sides of the ball bearing at the outer diameter and the curved surface of the ball to improve the contact area of the ball, thereby improving the life for maintaining the accuracy of the die set. Is to extend.

However, since it is used for a mold, it is convenient to extend the precision and lifespan by repeatedly performing the operation of reciprocating a certain short distance in the up, down direction or the left and right directions.

Recently, in a machine that requires precision, such as for an automated machine or an industrial machine, precision is required while reciprocating at high speed, but since the ball is made of metal balls, heat is generated by friction between the metal ball and the parts during movement. Of course, the scratches occur in the heat treatment site due to the collision at the time of repeated repetition, which causes wear and tear, thereby lowering the precision and shortening the lifespan.

In addition, although there were some that could be applied exclusively to splines or gears that can move left and right while rotating, they could not be used for general purposes. There was a limit.

In addition, the guide bush maintains the ball bearing holding only half of the actual length while being connected to the guide post, which causes a decrease in precision and stability.

On the other hand, the ball retainer is to form a hole in the position where the ball is to be installed while precision processing using a pipe or wire, which causes a decrease in workability, thereby causing a decrease in productivity and a price increase.

Particularly, in the case of using a ball retainer using a non-ferrous (brass, aluminum) metal, waste is generated inside, which causes a shorter lifespan.

Recently, in the case of high precision, injection molded ball retainers are used, but in this case, precision is improved, but since the material is made of a resin, physical properties due to the coefficient of thermal expansion are deformed, and the ball easily falls out or breaks.

In addition, the caulking for holding the ball is only vulnerable because it supports only a portion of the outward direction, the phenomenon that the ball is separated (falling off) even a little use occurs.

In addition, Patent No. 668200 (announced on Jan. 11, 2007), filed by the present applicant, includes an inner retainer formed by a ball support groove at a predetermined interval in the inner diameter direction and connected in a circular shape at a coupling uneven portion;

An out retainer having a ball support groove formed at a predetermined interval in an outer diameter direction assembled to the outside of the inner retainer and being rolled in a circular shape at a connection surface;

A steel ball is inserted into the ball support groove, and the joint recess and the connection surface are welded to the spot welding part at different positions, so that the ball retainer is configured.

However, such a conventional high precision ball retainer was a very difficult task to form a ball support groove so that the steel ball can be stably inserted into the seat, it is very difficult to form the joint uneven portion at both ends, the manufacturing process is complicated, Since the inner retainer and the outer retainer occupy half of the entire surface, it was very difficult to insert the steel ball into one retainer and then assemble the other retainer.

The present invention has been devised to solve such a conventional drawback, the hole in which the ball is to be placed using a metal sheet is processed using a press die, and then rolled and assembled, and then the fixing protrusion and the assembly groove at the upper and lower ends thereof. It is an object of the present invention to provide a ball retainer capable of mass production through a fixed structure.

An object of the present invention is to provide a manufacturing method of a high-precision ball retainer that is easy to install the ball when the inner ring and coring ring and the outer ring is combined with a metal sheet and easy to assemble.

The present invention made for this purpose is to cut a coil or sheet formed of a metal to a predetermined size and to form a punching or mold operation, by cutting the sheet to a predetermined size to the inner diameter sheet 21 and the core sheet 31 And the outer diameter sheet 42 is molded.

The inner diameter sheet 21 is formed by molding the inner diameter hole 22 in which the balls 12 are located at predetermined intervals at predetermined intervals, and cutting the fixing protrusion 23 and the assembly groove 24 at the upper side and the lower side. do.

The core sheet 31 forms the core hole 32 in which the balls 12 are located at predetermined intervals at predetermined intervals, and the assembling grooves 33 allow the fixing protrusions 23 and 44 to pass through the upper side and the lower side. Form by cutting.

The outer diameter sheet 42 is formed by molding the outer diameter hole 43 in which the balls 12 are positioned at predetermined intervals at predetermined intervals and cutting the fixing protrusion 44 and the assembly groove 45 at the upper side and the lower side. do.

The inner diameter sheet 21 is rolled in a circular shape so as to be connected at one portion of the connecting surface 25 to form the inner ring 20, and if necessary, the connecting surface 25 may be spot welded or processed into a concave and convex shape. will be.

The core sheet 31 is rolled in a circular shape so as to be connected at one portion of the connection surface 30a, thereby forming the core ring 30. will be.

The outer diameter sheet 42 is rolled in a circle to form the outer diameter rings 40 and 41 by being connected at two connecting surfaces 46 at positions symmetrically in one or both sides, and forming the connecting surfaces 46 if necessary. It can be connected by spot welding or by processing into uneven shape.

Assembling the inner ring 20 and the core ring 30 and inserts the ball 12 into the inner bore 22 and the core hole 32 independently.

When the ball retainer 10 is formed by inserting the ball 12 into the inner diameter ring 20 and the core ring 30 and using the outer diameter ring 40 having one connection surface 46 as shown in FIG. It is assembled by moving from the upper side to the lower side in the state, and when the connecting surface 46 is formed symmetrically on both sides and has two outer diameter rings 40 and 41, as shown in FIG.

When the inner ring 20, the core ring 30 and the outer ring 40, 41 are assembled, the fixing protrusion 23 protrudes upward and downward in the inner ring 20, and is fixed to the outer ring 40. Since the protrusions 44 protrude upward and downward, when the fixing protrusions 23 of the inner diameter ring 20 are bent in the direction of the outer diameter ring 40 as shown in FIG. The fixing protrusion 23 is positioned at the assembly groove 33 of the ring 30 and the assembly groove 45 of the outer diameter ring 40, and the fixing protrusion 44 of the outer diameter ring 40 is positioned at the core ring 30. When bent in the direction of the assembling groove 33 and the assembling groove 24 of the inner diameter ring 20 of the core ring 30 is fixed to the assembling groove 33 of the core ring 30 and the assembling groove 24 of the inner diameter ring 20. The protrusion 44 is located.

In this way, the fixing protrusion 23 of the inner diameter ring 20 is bent and fixed toward the assembly groove portion 33 of the core ring 30 and the assembly groove portion 45 of the outer diameter ring 40, and the The fixing protrusion 44 is bent toward the assembly groove 33 of the core ring 30 and the assembly groove 24 of the inner diameter ring 20, so that the fixing protrusions 23 and 44 are bent in opposite directions, respectively. By maintaining the combined state will be able to maintain a solid state without disassembly.

On the other hand, as shown in Figure 11, the inner diameter of the ring 20 and the core ring 30 is formed without being integral to the hole 12 to insert the ball 12 using a metal sheet having the same thickness After the ball 12 is inserted and molded to surround the outer ring (40, 41) with one or two will be able to form the ball retainer (10).

The present invention made up of such a configuration is to provide a ball retainer 10 which can be driven in a desired direction by inserting the shaft into the shaft insertion hole 11 of the inner diameter ring 20 by installing the ball 12,

The inner diameter ring 20, the core ring 30, and the outer diameter rings 40 and 41 can be molded in one step using the inner diameter sheet 21, the core sheet 31, and the outer diameter sheet 42, After molding, the inner ring (20) and the core ring (30) are assembled in a round shape to insert the ball (12), and the outer ring (40, 41) is formed by one or two. Since the ball retainer 10 can be molded, mass production is easy.

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

EXAMPLE

(One). Cutting step of inner ring

Supplying coils such as SUJ, bearing steel sheet, etc., cut to a predetermined length to form the inner diameter sheet 21, while forming a plurality of inner diameter balls 22 at regular intervals therein, and fixing protrusions 23 on the upper side and the lower side. And the assembling groove part 24 is cut | disconnected and shape | molded.

(2). Cutting step of the coring ring

While supplying coils such as SUJ, bearing steel sheet, etc., cutting to a predetermined length to form the core sheet 31, a plurality of core balls 32 are formed at regular intervals therein, and assembly grooves 33 are provided at the upper side and the lower side. Is cut and molded.

(3). OD ring cutting step

While supplying coils, such as SUJ and bearing steel sheets, to cut to a predetermined length to form the outer diameter sheet 42, there are formed a plurality of outer diameter balls 43 at regular intervals therein, and fixing protrusions 44 on the upper side and the lower side. And the assembling groove 45 is cut and molded.

(4). Forming step of inner ring and outer ring

The inner diameter ring 21 and the outer diameter sheet 31 are rolled in a circular shape to shape the inner ring 20 and the outer ring 30, respectively, so that the connection surfaces 25 and 30a abut.

(5). Joining stage of ball

After combining the inner diameter ring 20 and the outer diameter ring 30 rolled in a circle, the inner diameter hole 22 and the core hole 32 coincide with each other to insert the balls 12 independently, and the outer diameter ring 40 to the outside thereof. , 41) are assembled to abut on the connecting surface 46.

(4). Stationary steps

The fixing protrusions 23 are bent and fixed in the direction of the assembling grooves 33 and 45 at the upper side and the lower side of the inner diameter ring 20, respectively, and the fixing protrusions 44 are fixed at the upper side and the lower side of the outer diameter rings 40 and 41, respectively. Bend in the direction in which the assembling grooves 33 and 24 are located, respectively, to fix them to be integral.

According to the present invention, the ball retainer is separated into an inner diameter ring, a core ring, and an outer diameter ring using a metal sheet, and then automatically produced, so that they can be assembled quickly.

The present invention can automatically produce the inner ring, the core ring and the outer ring by using a metal sheet, so the raw material is saved in tenths of the existing product, thereby minimizing the loss of raw materials and greatly improving the productivity by eight times compared to the existing product. It can make popularization possible.

Claims (4)

In the ball 12 is provided to insert a shaft into the shaft insertion hole 11 of the inner diameter ring 20 to configure a retainer for driving in the desired direction, An inner diameter ring 20 which is rolled in a circular shape on the connection surface 25 of the inner diameter sheet 21 and has an inner diameter ball 22 therein at a predetermined interval therein; A core ring (30) assembled outside the inner ring (20) and connected in a circular shape at a connection surface (30a) of the core sheet (31) and having a core ball (32) therein at a predetermined interval therein; The ball 12 is inserted into the inner diameter ball 22 and the core ball 32 and is rolled in a circular shape at the connecting surface 46 of the outer diameter sheet 42 and has an outer diameter ball 43 therein at a predetermined interval therein. High-precision ball retainer, characterized in that the outer ring (30) is coupled to the ball retainer (10) is configured. While supplying the steel sheet and cutting it to a predetermined length to form the inner diameter sheet 21, a plurality of inner diameter balls 22 are formed at regular intervals therein, and the fixing protrusions 23 and the assembly grooves 24 on the upper side and the lower side. Cutting the inner ring by shaping: A core for supplying a steel sheet and cutting it to a predetermined length to form the core sheet 31 while forming a plurality of core balls 32 at regular intervals, and cutting and forming the assembly grooves 33 on the upper and lower sides thereof. Cutting the ring; While supplying a steel sheet and cutting it to a predetermined length to form the outer diameter sheet 42, a plurality of outer diameter balls 43 are formed at regular intervals therein, and the fixing protrusions 44 and the assembly grooves 45 on the upper side and the lower side. Cutting the outer ring to form the outer ring; Forming an inner diameter ring and a core ring by rolling the inner diameter sheet 21 and the core sheet 31 in a circular shape to form the inner diameter ring 20 and the core ring 30 so that the connection surfaces 25 and 30a abut, respectively; After combining the inner ring 20 and the core ring 30 rolled in a circular shape, the inner diameter hole 22 and the core hole 32 coincide with each other to insert the balls 12 independently, and the outer diameter ring 40 to the outside thereof. , 41) assembling the ball to couple to abut on the connection surface 46; The fixing protrusions 23 are bent and fixed in the direction of the assembling grooves 33 and 45 at the upper side and the lower side of the inner diameter ring 20, respectively, and the fixing protrusions 44 are fixed at the upper side and the lower side of the outer diameter rings 40 and 41, respectively. Method for producing a high-precision ball retainer, characterized in that it comprises a fixing step by bending in the direction of the assembly groove (33, 24), respectively. The ball retainer (10) of claim 1, wherein the fixing protrusions (23) formed on the upper and lower sides of the inner ring (20) are assembled to the assembling groove (33) of the core ring (30) and the outer ring (40). The fixing protrusions 44 formed at the upper and lower sides of the outer diameter ring 40 and bent to the 45 are fixed to the assembling grooves 33 of the core ring 30 and the assembling grooves 24 of the inner diameter ring 20. High precision ball retainer characterized by bending and fixing. The ball retainer for high precision according to claim 1, characterized in that the outer diameter ring (40) is assembled by dividing the connecting surface (46) into two symmetrically into the outer diameter rings (40, 41).

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