KR102508104B1 - Holder for internal threading lathe tool - Google Patents

Abstract

The present invention relates to a safety locking type collet holder using an indirect pressing method, which can prevent damage to bites and is easy to replace by tightening an outer diameter of a holder to indirectly press the bites unlike a conventional collet holder which damages bites and is difficult to replace since a fixing bolt provided to a holder directly presses the bites, and can maximize the utilization of a space on a lathe by providing a T-shaped holder which allows cross-installation of the bites unlike a conventional straight holder requiring excessive space on the lathe, thereby making handling, use, maintenance, and repair more convenient due to the structure differentiated from the structure of the conventional holder, and maximizing convenience in use and efficiency. The safety locking type collet holder (100) using the indirect pressing method, to which a bite (2) is coupled by the medium of a collet (1) and which is installed on a tool rest (3) of a lathe to locate the bite on a workpiece, comprises: a housing (10) with a perforated interior through which the collet (1) is inserted; a slit part (20) which divides one side of the housing vertically; a tightening member (30) which reduces the inner diameter of the housing by tightening the slit part to induce pressure on the collet; and a support bar (40) which extends from one side of the housing, intervenes between an upper plate (3a) and a lower plate (3b) of the tool rest (3) of the lathe, and is fixed in position on the tool rest by being pressed with a plurality of fixing bolts (3c) fastened from the upper plate.

Description

Safety fixed collet holder based on indirect pressure method {Holder for internal threading lathe tool}

The present invention is to advance the technical idea related to the collet holder used for fixing the bite on the general-purpose lathe, and more specifically, the fixing bolt provided on the holder directly presses the bite to damage the bite and Unlike conventional collet holders, which were difficult to replace, indirectly pressurizes the bite by tightening the outer diameter of the holder, preventing damage to the bite and facilitating replacement, as well as improving the existing straight holder that required excessive space on the shelf is provided in a T-shape that can be cross-installed, thereby maximizing the utilization of the installation space of the shelf, maximizing convenience and efficiency of use due to ease of handling, use, maintenance, and repairs derived from the existing and differentiated structure. It relates to a safety fixed collet holder based on an induced indirect pressure method.

In general, a lathe is cutting processing equipment that processes an outer diameter and an inner diameter by contacting a bite to a set surface of a rotating workpiece in a state in which the workpiece is rotated.

The lathe generally includes: a headstock for fixing and rotating a workpiece; a tailstock supporting a workpiece fixed to the headstock while facing the headstock; and a carriage moving horizontally between the headstock and tailstock; and a tool stand mounted on the carriage and having a cutting tool installed thereon. Here, the tool rest is configured such that the upper plate and the lower plate are vertically spaced apart from each other, and include a height adjuster capable of adjusting the heights of the upper plate and the lower plate. The cutting tool includes a bite for cutting a workpiece; and a collet coupled to one end of the bite; and a collet holder allowing the collet to be installed on the tool post.

As described above, the collet holder is interposed and fixed between the upper and lower plates of the tool post in a state where the bite and the collet are coupled, and the height is adjusted by the tool post height adjusting tool, so that a desired part of the workpiece can be cut.

As a conventional technology related to the collet holder, Registered Utility Model Publication No. 20-0166581 "Holder for lathe cutting tool" is published, and the technology is integrally configured with a holder having an accommodating part and a fixing part fastened to a tool post. In addition, by forming a longitudinal slot in the collet so that the fastening bolt fastened to the holder passes through the collet and directly presses and fastens the cutting tool, effects such as improved fixing power of the tool, ease of leveling, and increased robustness due to integration are achieved. It is a technology that

However, the method of directly pressurizing the fastening bolt to the bite causes scratches on the contact area between the fastening bolt and the bite for various reasons such as long-term operation of the lathe, vibration of the device, and corrosion caused by external factors, reducing the life of the bite and reducing the collet and bite. It causes several problems, such as making it difficult to attach and detach the liver.

On the other hand, the tool rest generally has a rectangular parallelepiped shape, and bites of different standards are installed on each side, and the tool post is rotated to replace the bite of the desired standard so that the designer can conveniently shape the outside shape.

However, a conventional collet holder is formed in a straight shape, and when long bytes are coupled to each other, the bytes interfere with each other, so that all four sides of the tool post are not utilized, and only two or three sides are used.

As described above, in the past, a single byte has been used for a long period of time due to the inconvenience of replacing bytes and the limitation of space for placement. Therefore, there is an urgent need for a collet holder having a structure that can be easily installed on the four sides of the tool rest without damaging the bite and collet.

Registered Utility Model Publication No. 20-0227465 "C&C lathe tool holder"

The present invention was created in order to more actively solve the above problems, and unlike the existing collet holder in which the fixing bolt provided in the holder directly presses the bite and it is difficult to damage and replace the bite, the bite is indirectly The main challenge is to provide a collet holder that guarantees a long lifespan of the bite by improving the structure and operation form of the holder so as to be pressurized, and actively improves operability, replaceability, and manageability.

In addition, the present invention is another challenge to provide a collet holder that can be easily installed and utilized without space limitations by improving the overall structure of the holder, unlike the existing holders that are straight and require excessive space on the shelf.

In addition, another challenge of the present invention is to provide a collet holder with excellent performance, which is extremely easy to handle, use, maintain, and repair through a structure differentiated from the conventional one, and which maximizes convenience and efficiency of use.

In order to achieve the above object, the configuration of the safety fixed collet holder based on the indirect pressure method proposed in the present invention is as follows.

In the present invention, the interior is penetrated so that the collet 1 is inserted, and the first enclosing portion 11 is located above the cutout 20 and wraps around the top of the collet 1, and is located below the cutout to form a collet. A housing 10 including a second enclosing portion 12 covering the lower end; and a cutout 20 dividing one side of the housing up and down; and pressing the collet as the inner diameter of the housing is reduced by tightening the cutout. A fastening member 30 that induces; and, extending from one side of the housing and interposed between the upper plate 3a and the lower plate 3b of the tool rest 3, by a plurality of fixing bolts 3c fastened from the upper plate In the collet holder composed of a support bar 40 that is pressurized and fixed in position on the tool post, the collet 1 is formed by a pressing member 50 obliquely penetrated from the second enclosing portion 12 to the housing. It is in close contact with one surface of the inner diameter of and adheres to the position, and the pressing member 50 is a pusher 51 obliquely inserted into the assembly hole 12a from the outside of the second enclosing part 12; and, the inner diameter of the housing and a pressing part 52 which is obliquely intervened into the assembly hole and whose exposure height to the inner diameter of the housing is variable according to the insertion position of the push part to press one surface of the collet 1; the push part 51 is on the outer circumference A screw thread is formed and screwed into the assembly hole 12a, and a tightening part 51a whose insertion depth is adjusted according to the tightening degree, and a second enclosing portion 12 protruding with an expanded diameter from the end of the tightening part includes a gripping portion 51b that is exposed to the outside and allows a user's grip, and the pressing portion 52 is installed on the inner diameter of the housing 10 to support one side of the collet 1; a pressing surface 52a and a safety fixed collet holder based on an indirect pressing method including an extension bar 52b extending from the lower surface of the pressing surface and inserted into the assembly hole 12a.

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A plurality of installation holes 10h are formed at intervals inside the housing 10 to provide a fixing means, and a plurality of inlet grooves 1h are formed at intervals on the outer diameter of the collet 1 to fix it. It is characterized in that the collet is fixed by means.

The fixing means is configured by including a cylindrical socket 110 in the installation hole 10h,

The socket 110 is configured by including an elastic spring 120 having an elastic force and an upper part of the elastic spring 120 having a hook 130 tapered so that the front end is narrowed,

It is characterized in that the upper end of the elastic spring 120 is fused so that the lower end of the locking member 130 is fixed.

According to the present invention composed of the above-described configuration, since the mounting of the collet 1 is determined depending on whether or not the fastening member fastened vertically to the cutout of the holder is fastened, there is an effect that assembly and replacement are very easy.

In addition, unlike the prior art in which the clamping member directly pressurizes and fixes the bite, the present invention tightens the first and second enclosing parts of the housing to reduce the inner diameter of the housing, so that the collet is indirectly pressurized and mounted. Since the bite is fundamentally prevented from being damaged, a long lifespan can be expected, and since it is easy to replace, there is an advantage in that a workpiece of excellent quality can be obtained by easily and conveniently replacing bytes of various specifications.

In addition, in the present invention, since the housing to which the collet is coupled and the support bar intervening in the tool post of the lathe are formed in a straight line, it is impossible to install various types of collet tools on one tool post due to unreasonable securing of installation space and interference between tools. Unlike the holder of ', the housing to which the collet is coupled and the support bar intervening in the tool post of the lathe are formed in a T-shape, so the required installation space can be actively reduced compared to the existing ones. Furthermore, the holder is installed in the longitudinal direction on the lathe. And, as the collet is installed in the holder in the lateral direction to prevent interference between tools, collet tools of various specifications can be installed on one tool post, which has a very advantageous effect in machining.

In addition, the present invention has other effects of maximizing convenience and efficiency of use due to ease of handling, use, maintenance, and repairs resulting from a structure differentiated from the conventional one.

1 is a perspective view of a collet holder configured according to a preferred embodiment of the present invention.
Figure 2 is a plan view and a side view of the collet holder proposed by the present invention.
Figure 3 is an exploded perspective view of the collet holder proposed by the present invention.
Figure 4 is a perspective view of each coupling of the collet and the bite to the collet holder proposed by the present invention.
5 to 7 are a perspective view and a plan view showing a state in which the collet holder is coupled to the tool rest.
8 to 9 are side views showing a technique capable of fastening collets or bites of various diameters by installing a pressing member to a collet holder according to another embodiment of the present invention.
10 to 12 are exemplary views illustrating a technique for improving the position and fixing force of a collet by installing a fixing means in a housing according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the configuration of the present invention and the resulting actions and effects will be collectively described.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be implemented in a variety of different forms, and only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. And like reference numerals designate like elements throughout the specification.

The present invention is disclosed with respect to the technical idea of a collet holder used for fixing bytes on a general-purpose lathe.

Above all, the present invention prevents damage to the bite by indirectly pressurizing the bite by tightening the outer diameter of the holder, unlike the existing collet holder in which the fixing bolt provided in the holder directly presses the bite to damage and replace the bite, and Unlike the existing straight holders that facilitated replacement and required excessive space on the shelves, the T-shape that allows cross-installation of bites allows maximization of shelf installation space utilization and differentiated structure from the existing ones. Note that it is related to a safety fixed collet holder based on an indirect pressurization method that maximizes convenience or efficiency of use due to ease of handling, use, maintenance, and maintenance.

1 is a perspective view of a collet holder constructed according to a preferred embodiment of the present invention, FIG. 2 is a plan view and side view of the collet holder proposed by the present invention, Figure 3 is an exploded perspective view of the collet holder proposed by the present invention, 4 is a perspective view in which a collet and a bite are coupled to a collet holder proposed by the present invention, FIGS. 5 to 7 are a perspective view and a plan view showing a state in which the collet holder is coupled to a tool post, and FIGS. It is a side view showing a technique capable of fastening collets or bites of various diameters by installing a pressing member in a collet holder according to another embodiment of the present invention.

The present invention relates to a collet holder (100) for installing a bite to a tool rest (3) of a lathe. Here, the lathe includes: a headstock for fixing and rotating a workpiece; a tailstock supporting a workpiece fixed to the headstock while facing the headstock; and a carriage moving horizontally between the headstock and tailstock; and a tool post 3 mounted on the carriage and on which the collet holder is installed. The tool post 3 is a support for positioning the collet holder 100 and the bite 2 on a workpiece fixed to the headstock. In the tool post 3, the upper plate and the lower plate are vertically spaced apart from each other, allowing the collet holder 100 to intervene and be fixed. The top plate and the bottom plate are configured to include height adjustment by a separately provided height adjusting tool.

The holder 100 for the collet is coupled to the bite 2 via the collet 1, and is installed on the tool post 3 of the lathe to position the bite on the workpiece.

The collet 1 has a cylindrical structure to allow insertion of the bite 2, and a number of cuts are made in the longitudinal direction on the outer circumferential surface, or a plurality of slits extending in the longitudinal direction are formed at one end of the collet to be spaced apart in the circumferential direction. As it contracts and expands, it fixes the inserted bite. Since the collet 1 is a widely used off-the-shelf product, further detailed description will be omitted.

The bite 2 is a cutting tool for shaping the outer shape and inner shape of a workpiece, and specifically, for roughing to cut unnecessary parts of the outer diameter and inner diameter of a workpiece in order to process it into desired dimensions; and the outer diameter of a workpiece. For finishing, which precisely cuts the inner diameter to the desired dimension; And, For inner diameter hole processing to form a through hole in a workpiece; And, For other processing such as cutting/tapering/tapping/die processing, etc.; consists of etc.

In the tool post 3, the upper plate and the lower plate are vertically spaced apart from each other, allowing the collet holder 100 to intervene and be fixed. The top plate and the bottom plate are configured to include height adjustment by a separately provided height adjusting tool. On the other hand, the tool post 3 is made up of a rectangular parallelepiped as a whole, and various types of bytes can be arranged on each side. For example, a bite for roughing is installed on one side, a bite for finishing is installed on another side, A byte for hole processing can be installed on the side, and a special byte can be basically installed on the remaining side.

The collet holder 100 includes a housing 10 through which the collet 1 is inserted; a cutout 20 dividing one side of the housing up and down; and reducing the inner diameter of the housing by tightening the cutout. A clamping member 30 that induces pressurization of the collet according to the setting; and, extending from one side of the housing and interposed between the upper plate 3a and the lower plate 3b of the tool post 3, a plurality of fixings fastened from the upper plate It consists of a support bar 40 that is pressed by the bolt 3c and fixed to the tool post.

The housing 10 is composed of a rectangular parallelepiped body 10a and an insertion portion 10b through which both ends of the body penetrate to allow the collet 1 to be inserted. In the housing 10, a cutout 20 is formed from the front to the section leading to the insertion part 12, so that one side of the body 10a is divided into an upper side and a lower side. Here, the upper side of the body 10a based on the incision 20 becomes the first enclosing portion 11 surrounding the upper end of the collet 1, and the lower side of the body based on the incision 20 surrounds the lower end of the collet. It becomes the enclosing part 12.

The insertion part 12 has a slightly smaller diameter than the outer diameter of the collet 1, and when a large-diameter collet is installed in the small-diameter insertion part, the cutout 20 of the body 10a is widened. When the insertion is completed, the opened incision voluntarily returns to its original state and presses the inserted collet.

The tightening member 30 is assembled by vertically penetrating the first enclosing portion 11 and the second enclosing portion 12 divided by the cutout 20 . The fastening member 30 is preferably composed of a pillar having a predetermined length and a screw thread on the outer periphery of the pillar, a bolt head at one end of the pillar, and a wrench bolt allowing the intervention of a wrench on the bolt head. . The first enclosing portion 11 is formed with a counterbore to allow the fastening member 30 to penetrate and the bolt head to be seated. Bolt holes are formed in the second enclosing portion 12 to permit bolt coupling of the fastening member 30 penetrated from the first enclosing portion 11 .

In the tightening member 30 having the coupling form as described above, the separation distance of the cutout 20 is adjusted according to the degree of tightening, and as the tightening member is tightened, the first enclosing portion 11 and the second enclosing portion 12 are separated. As the separation distance decreases, the diameter of the insertion portion 12 is reduced to strongly press the collet 1 inserted into the insertion portion.

A plurality of the tightening members 30 are installed at set intervals corresponding to the width of the housing 10, and pressurize all of the insertion sites of the collet 1 with a uniform pressure. According to a preferred embodiment of the present invention, one location is disposed at the center of the housing 10, and a total of three locations, each one at locations adjacent to both edges of the housing, may be disposed.

The support 40 extends from the rear surface of the housing 10 and has a long rectangular block shape in the longitudinal direction. The support 40 is interposed between the upper plate 3a and the lower plate 3b provided on the tool post 3, and is fixedly installed in the intervening space by a fixing bolt 3c fastened through the upper plate.

On the other hand, the present invention includes the configuration of the pressing member 50 capable of reinforcing the free space due to the diameter difference so that the collet 1 having a smaller outer diameter than the diameter of the insertion part 10b of the housing 10 can be installed. .

The pressing member 50 is intervened in an oblique direction from the bottom of the second enclosing portion 12 to the insertion portion 10b. For example, the shape and exemplary structure of the pressing member 50 are shown in FIGS. 8 and 9. First, it is assumed that an assembly hole 12a is formed in the second enclosing portion 12 so that the pressing member 50 can intervene, and the pressing member is installed obliquely in the second enclosing portion through the assembly hole. .

The pressing member 50 includes a pusher 51 obliquely entering the assembly hole 12a from the outside of the second enclosing part 12; and an assembly hole 12a in the insertion part 10b of the housing 10. It consists of two sets of configurations divided into;

The push part 51 has a screw thread formed on its outer circumference and screwed into the assembly hole 12a, and a tightening part 51a having an insertion depth adjusted according to the tightening degree; and protruding with an expanded diameter from the end of the tightening part. and a gripping portion 51b exposed to the outside of the second enclosing portion 12 to allow the user to grip.

And the pressing part 52 is installed on the inner diameter of the housing 10 and has a pressing surface 52a supporting one surface of the collet 1; and extending from the bottom surface of the pressing surface and inserted into the assembly hole 12a. Extension bar (52b); consists of.

As described above, the pressing member 50 manipulates the gripping portion 51b to allow the tightening portion 51a to enter the assembly hole 12a, thereby moving the pressing portion 52 installed in the assembly hole 12a into the insertion portion 10b. ) is pushed out. The pressing part 52 set and pushed from the assembly hole 12a in this way brings the collet 1 into close contact with one side of the insertion part 10b and at the same time presses between the contact surface with the pressing surface 52a and the contact surface with the insertion part. to fix a collet with a smaller diameter than the insert to the housing.

In addition, as shown in FIGS. 10 to 12, the collet 1 fixed to the housing 10 is finely rotated in the process of tightening the tightening member or the process of lathe processing, thereby solving the problem of processing the housing. (10) In order to improve the collet's position and fixing force inside, a separate fixing means is included.

In addition, a plurality of installation holes 10h are formed at intervals inside the housing 10 to provide a fixing means, and a plurality of inlet grooves 1h are formed at intervals on the outer diameter of the collet to provide a fixing means. Secure the collet.

The fixing means is configured by including a cylindrical socket 110 in the installation hole 10h, and the socket 110 is fixed by being forcefully fitted into the installation hole 10h, or welding is performed while being inserted into the installation hole 10h. It can also be fused and fixed.

In addition, the fixing means is configured by including an elastic spring 120 having an elastic force in the socket 110 and a hook 130 tapered so that the tip is narrowed on the upper part of the elastic spring 120, and the elastic spring 120 The upper end is fused so that the lower part of the hook 130 is fixed.

That is, looking at the form in which the collet 1 is fixed inside the housing 10 through the fixing means, the initial hook 130 is partially protruded from the inside of the socket 500 by the elastic spring 120, , When the collet 1 is moved into the housing 10, the collet 1 is rubbed against the locking member 130 and a load is applied to the locking member 130.

At this time, due to the load applied to the locking member 130, the elastic spring 120 is elastically compressed so that the locking member 120 is drawn into the socket 110, and the inlet groove 1h formed in the collet 1 is the locking member ( 120), the load applied to the locking hole 120 disappears, and the elastic spring 110 is restored, and the locking hole 120 is drawn into the inlet groove 1h and caught, so that the collet 1 moves inside the housing 10. The fixation is made in the rotation of the collet 1 fixed to the housing 10 during the machining process of the lathe while preventing the collet 1 from being rotated left and right by the external force generated during the tightening process of the tightening member. By preventing it with a member, the position of the bite 2, which is substantially processed, is firmly fixed.

In the collet holder 100 of the present invention having the configuration as described above, assembly and replacement are easy because whether or not the collet 1 is mounted depends on whether or not the clamping member 30 vertically fastened to the cutout 20 is tightened. It's very easy. In addition, unlike the conventional method in which the clamping member 30 directly presses and fixes the bite 2, the inner diameter of the housing is reduced by tightening the first enclosing portion 11 and the second enclosing portion 12 of the housing 10. As the collet (1) is indirectly pressurized and mounted as it is reduced, damage to the bite is fundamentally prevented and long life can be expected. artifacts can be obtained.

In addition, the housing 10 to which the collet 1 is coupled and the support bar 40 intervening in the tool post 3 of the lathe are formed in a straight line, resulting in excessive securing of installation space and interference between tools, resulting in various types of collet tools. Unlike existing holders that could not be installed on one tool post, the housing to which the collet is coupled and the support bar intervening in the tool post of the lathe are formed in a T-shape, so the required installation space can be actively reduced compared to the existing ones. Furthermore, since the holder is installed in the longitudinal direction and the collet is installed in the holder in the lateral direction, interference between tools is prevented, and collet tools of various specifications can be installed on one tool post, which is very advantageous for machining. In addition, convenience and efficiency of use are maximized due to ease of handling, use, maintenance and repair, etc. derived from a structure differentiated from the existing one.

The present invention described above has been described with reference to one embodiment shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other embodiments therefrom. will have to be clarified. Therefore, the true technical protection scope of the present invention should be construed by the appended claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1. Collet 2. Bites
3. Tool post 100. Holder for collet
10. Housing 11. First enclosure
12. Second Enclosure 20. Incision
30. Fastening member 40. Support bar

Claims (5)

The interior is penetrated so that the collet 1 is inserted, and the first enclosing portion 11 is located above the cutout 20 and surrounds the upper end of the collet 1, and is located below the cutout and surrounds the lower end of the collet A housing 10 including a second enclosing portion 12; And, a cutout 20 dividing one side of the housing up and down; And, as the inner diameter of the housing is reduced by tightening the cutout, pressurization of the collet is induced. The clamping member 30 extends from one side of the housing and is interposed between the upper plate 3a and the lower plate 3b of the tool post 3, and is pressed by a plurality of fixing bolts 3c fastened from the upper plate to make the tool In the collet holder composed of; a support bar 40 fixed in position on the stand,
The collet 1 includes being adhered to one surface of the inner diameter of the housing by a pressing member 50 intervened obliquely from the second enclosing portion 12,
The pressing member 50 includes a push part 51 obliquely inserted into the assembly hole 12a from the outside of the second enclosing part 12; and obliquely interposed into the assembly hole from the inner diameter of the housing, depending on the insertion position of the push part. A pressing part 52 for pressing one surface of the collet 1 by varying the exposure height to the inner diameter of the housing; includes,
The push part 51 has a screw thread formed on the outer circumference and screwed into the assembly hole 12a, and a tightening part 51a having an insertion depth adjusted according to the degree of tightening, and a protrusion with an expanded diameter at the end of the tightening part. and a gripping part 51b that is exposed to the outside of the second enclosing part 12 and allows the user to grip,
The pressing part 52 includes a pressing surface 52a installed on the inner diameter of the housing 10 and supporting one surface of the collet 1, and an extension bar extending from the bottom surface of the pressing surface and inserted into the assembly hole 12a. A safety fixed type collet holder based on an indirect pressurization method including (52b).
delete delete According to claim 1,
A plurality of installation holes 10h are formed at intervals inside the housing 10 to provide a fixing means,
A plurality of inlet grooves 1h are formed at intervals on the outer diameter of the collet 1,
A safety fixed type collet holder based on an indirect pressure method in which the collet is fixed inside the housing 10 by the fixing means. According to claim 4,
The fixing means is configured by including a cylindrical socket 110 in the installation hole 10h,
The socket 110 is configured by including an elastic spring 120 having an elastic force and an upper part of the elastic spring 120 having a hook 130 tapered so that the front end is narrowed,
Safety fixed type collet holder due to the indirect pressure method, characterized in that the upper end of the elastic spring 120 is fused so that the lower part of the locking member 130 is fixed.

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