KR102006579B1 - Processing method for metallic products - Google Patents

Abstract

The present invention relates to a method for processing a metal product and, more specifically, to a method for processing a metal product wherein a fitting work on an O-ring groove for inserting an O-ring can be performed more easily and quickly in the process of the metal product with the O-ring. The present invention relates to the method for processing the metal product with the O-ring, comprising: a design step of generating design data such that a dimension and shape of each part of the metal product are realized from a metal material, wherein the metal product includes an O-ring groove for inclusion of the O-ring; a processing step of manufacturing, by a processing device, an intermediate product including the O-ring groove by processing the metal material in accordance with the design data; and an O-ring groove fitting step of disposing the intermediate product on a turntable and rotating the turntable to perform a fitting work on the O-ring groove.

Description

{PROCESSING METHOD FOR METALLIC PRODUCTS}

The present invention relates to a method of machining a metal product, and more particularly, to a method of machining a metal product having an O-ring, And a processing method.

Processing of metal products, especially tall processing, is a process in which a manufacturer provides services for product processing from an orderer and receives compensation.

These process steps include the design stage for designing the processing shape and dimensions of the product requested by the orderer, the processing step for processing the product using the processing device, the inspection step for the processed product, and the shipment of the finished product And a shipment stage.

The metal processing including the above-mentioned machining is performed by machining a metal material through a machining apparatus including a lathe, a milling machine, a boring machine, a drilling machine, a machining center (MCT), a CNC (Computerized Numerical Control) Some of the various metal products are equipped with o-rings for the purpose of improving airtightness and enhancing bonding properties. When machining a metal product having an O-ring, the process of forming the O-ring groove for insertion of the O-ring must be performed. This is because the O-ring groove is implemented in the metal product manufactured by including the O-ring groove from the designing stage.

The O-ring groove formed in the metal product through the machining device is performed by grooving and is formed by forming a groove on the surface of the metal. Since the O-ring groove immediately after the formation is smooth and uneven, the cutting operation for the surface treatment is added .

This additional cutting operation is called "finishing". In the past, such a finishing operation has been performed manually. Therefore, the finishing quality and the working time are largely influenced by the skill of the operator, There is a problem that it is difficult to guarantee a uniform quality of production as well as a problem of increase in labor.

No. 10-1860438 (May 16, 2018) (hereinafter referred to as " prior art ") discloses a conventional technology relating to finishing work. In the prior art, a grinding stone is used to mold a surface of a mold easily, And a mold processing method using the same.

However, the prior art is not suitable for the finishing operation for the O-ring groove, and is somewhat distant from the present invention.

The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide an intermediate product manufactured by a machining apparatus, which can perform a mapping operation on an o-ring groove on a rotating turntable, And to provide an effect such as quality assurance.

In addition, the intermediate product placed on the turntable is more firmly fixed, and the metal products of various sizes and shapes can be fixed, making it universally applicable to the O-ring grooving process for metal products of various sizes and shapes To be able to do so.

In addition, in the coupling structure between the body of the turntable and the clamping finger for fixing the heavy-weight product, it is possible to improve the straightness of movement of the clamping finger while fixing the clamping finger to the body without shaking, So that the intermediate product can be fixed.

The present invention for solving the above problems has the following steps and features.

The present invention relates to a method of machining a metal product with an O-ring, in which the dimensions and shape of each part of the metal product are realized from the metal material, wherein the metal product produces design data such that the metal product comprises an O- A step of designing and fabricating an intermediate product including the O-ring groove by machining the metal material according to the design data, and arranging the intermediate product on a turntable, rotating the turntable, And an O-ring groove mapping step in which the mapping operation is performed on the O-ring groove.

The turntable may further include a body having a rotating part and a seat part on which the intermediate part is disposed, and a fixing part provided on the body and fixing the intermediate part to the seat part, And a plurality of moving slits radially arranged around the moving slit, wherein the fixing means includes a pressing finger provided on each moving slit and moving back and forth along the moving slit.

The pierced fingers may include a guided groove provided on a side surface thereof, the guided grooves may include a first inclined portion provided on the opening side and narrowed inwardly toward the inner side, A second inclined portion extending inwardly from the narrow width portion and formed to have a larger width toward the inner side and a wide width portion extending inwardly from the second inclined portion, And a guide protrusion having a shape corresponding to the guide groove may be provided.

The present invention having the above-described steps and features provides an O-ring groove mapping operation in a state where the intermediate product is fixed on a turntable, thereby improving work speed, saving labor, and ensuring uniform quality of mapping operation.

Further, by providing a fixing means provided on the moving slit and the moving slit provided on the body, the fixing means having the pressing finger as a core as a core, the intermediate product disposed on the turntable is more firmly fixed, All products can be fixed, which makes it universally applicable to O-ring grooving processes for metal products of various sizes and shapes.

In addition, since the coupling between the pressing finger and the body is constituted by a groove-projecting structure, the unique structure of the to-be-guided groove is employed to improve the straightness of movement of the pressing finger and to fix the pressing finger to the body without shaking, So that the intermediate product can be stably fixed without shaking.

1 shows each step of the invention.
2 is an embodiment of a metal working apparatus.
3 is an embodiment of a turntable according to the present invention.
4 is an embodiment relating to a coupling structure of a guide projection and a guide groove.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

More particularly, the present invention relates to a method of machining a metal product, which can more easily and quickly carry out an operation for machining an O-ring groove for insertion of an O-ring in the machining of a metal product having an O-ring.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for processing a metal product according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the method includes a design step S1, a machining step S2, and an O-ring groove (G) mapping step S3, which is a metal product processing method with an O-ring.

In each step, the designing step S1 is a step of generating design data such that the dimensions and shape of each part of the metal product are realized from the metal material, and design data in which data on the dimensions and shapes of the respective parts of the metal product are generated is generated .

At this time, the design data is configured such that the metal product includes an O-ring groove (G) for the provision of the O-ring. Therefore, the design data must include information on the position, shape and dimensions of the O-ring groove (G).

Such design data can be generated by an application program provided in a computer or the like, and the generated design data is input to the processing apparatus A in a processing step to be described later, so that the processing apparatus A processes the metal material in accordance with the design data do. A computer or the like for generating design data may be provided separately from the processing apparatus A or may be provided as one configuration of the processing apparatus A. [

Next, the machining step S2 is a step in which the machining apparatus A processes the metal material according to the design data to fabricate the intermediate product I including the O-ring groove G. As shown in Fig. 2, The metal material is disposed and processed in the placement table of the processing apparatus A, and the produced intermediate product I has an O-ring groove G.

The processing of the metal material includes all the processes related to metal processing such as cutting, bending, cutting, bending, grooving and the like, wherein the machining apparatus (A) is a lathe, milling machine, boring machine, drilling machine, machining center ), A computerized numerical control (CNC) machine, and the like. This machining step S2 may include all known machining and well-known machining operations in the metal machining field, and is not specified in any one embodiment.

However, since the present invention is limited to the processing of a metal product having an O-ring, in the present invention, the machining step S2 must include a step of forming an O-ring groove (G).

Next, the O-ring groove (G) shaping step S3 is a step of arranging the intermediate product I on the turntable T and rotating the turntable T to perform a mapping operation on the O-ring groove G , And finishing (finishing) work is a work to trim unnecessary parts or to perform polishing for surface treatment, and corresponds to the finishing step of processing.

Conventionally, since the manual operation is performed manually, the quality of the manual operation and the working time are largely determined depending on the skill level of the operator. In addition, it is difficult to guarantee a uniform quality of the manual operation .

The present invention makes it possible to perform a mapping operation on an oval groove (G) of an intermediate product (I) manufactured through a processing device (A) on a rotating turntable (T), thereby improving work speed, Quality guarantee and so on.

Further, as shown in FIG. 1, the metal product that has undergone the above-described O-groove groove (G) shaping step S3 is completed through other processing steps (S4) and inspection steps (S5) ).

The other processing step (S4) may include all steps for commercialization such as painting, surface treatment, coating, as well as mapping work for other parts except the mapping operation for the O-ring groove (G).

Hereinafter, specific embodiments of the turntable T will be described, and effects of the turntable T will be described.

3, the turntable T comprises a main body 1 and a fixing means. The main body 1 incorporates a rotating means, and the intermediate product I And the fixing means is provided on the body 1 and fixes the intermediate product I to the seat portion 11. [

Therefore, the intermediate product I disposed on the seating part 11 is fixed by the fixing means, and the body 1 performs the finishing operation while rotating the intermediate product I by the rotating means. At this time, the mapping operation for the intermediate product I fixed to the turntable T and rotating together may be performed manually by the operator, may be performed by a mapping machine, and is not necessarily specified in any form . However, even when the operator carries out the finishing work manually by utilizing the turntable T, the effect of the work speed improvement, the labor reduction, and the uniform quality guarantee can be obtained compared with the conventional manual finishing work.

3, according to one embodiment of the fixing means described above, the present invention is characterized in that the body 1 comprises a plurality of moving slits (not shown) arranged radially around the seating part 11 Characterized in that the fixing means comprises a pressing finger (20) provided on each moving slit (12) and moving back and forth along the moving slit (12).

3 shows three moving slits 12 arranged radially around the seating part 11 and the pressing finger 20 is also rotated by the first to third fingers 20A, 20B and 20C It can be seen that three are provided. If necessary, two or more pressing finger 20 may be provided, which can be selected according to the required fixing force depending on the shape of the intermediate product (I).

The first to third fingers 20A, 20B and 20C are fixed in the form of pressing the intermediate product I through the pressing surface 22 provided at the front while being moved back and forth with respect to the seating part 11 The pressing surface 22 corresponds to the front surface of the pressing finger 20 and presses the intermediate product I such that the pressing surface 22 contacts the intermediate product I, It is preferable that the fingers 20A, 20B, and 20C have the same displacement and are moved back and forth simultaneously.

The pressing finger 20 can be moved by various means. In the present invention, the moving means of the pressing finger 20 is not specified in any one embodiment.

In addition, according to one specific embodiment of the grip finger 20, the grip finger 20 may further include a step portion 23 provided on the upper portion and including a plurality of steps.

The step 23 may have a stepped shape formed at a higher position than the stepped portion provided at the rear and having a height increased toward the front. 3, the step 23 includes a first step 231 provided at the rear end, a second step 231 provided at the front of the first step 231 and a second step 231 formed at a position higher than the first step 231, And a third step 233 provided in front of the second step 232 and the second step 232 and higher than the second step 232.

The clamping finger 20 needs to have a sophisticated straightness in order to improve the clamping force of the intermediate product I and it is necessary to provide a clamping force in the moving slit 12 at the time of rotation in consideration of the fact that the turntable T rotates at a high speed It needs to be fixed without shaking.

To this end, the present invention proposes a coupling structure between the body 1 and the gripping finger 20 for improving the straightness of the gripping finger 20 and preventing the swinging of the gripping finger 20.

3 and 4, according to one embodiment of the coupling structure between the body 1 and the pinched fingers 20, the pinched fingers 20 of the present invention are provided with guided grooves 21 And a guide protrusion 13 protruding inwardly on the inner wall of the moving slit 12 and having a shape corresponding to the guided groove 21 may be provided.

The guide protrusion 13 provided on the inner wall of the moving slit 12 is inserted into the guided groove 21 provided on the side surface of the press finger 20 so that the guide protrusion 13 is inserted into the guiding groove 21, (20) to guide the forward and backward movement of the pressing finger (20). As the guide protrusion 13 is inserted into the guided groove 21, the guided protrusion 13 is restrained by the guided protrusion 13 and the pressing force of the pressing finger 20, When the centrifugal force or the centripetal force is applied due to the rotation of the tongue T, the clamp finger 20 is fixed in the moving slit 12 without shaking.

4, the guided grooves 21 are provided on the opening side and include a first inclined portion 211 formed so as to have a smaller width toward the inner side, a second inclined portion 211 formed on the first inclined portion 211 A second inclined portion 213 extending inward from the narrowed portion 212 and formed to have a greater width toward the inner side, and a second wide inclined portion 213 extending inward from the second inclined portion 213, (214). ≪ / RTI >

The guide protrusion 13 has a shape corresponding to the first inclined portion 211, the narrowed portion 212, the second inclined portion 213 and the wide portion 214 according to the structure of the guided grooves 21 Under such a structure, the clamping fingers 20 are inserted in such a manner as to be pushed in from the outer end of the moving slit 12.

The guided grooves 21 having the above structure have a width larger than that of the narrowed portions 212 because the end portions of the guiding projections 13 disposed on the wider portion 214 side when an external force is generated on the gripping fingers 20, And the contact area between the pressing finger 20 and the body 1 can be made more rigid and free of clearance since the contact area is made larger than that of the simple groove-projection structure.

Meanwhile, in the present invention, since the turntable T rotates at a high speed, it is considered that iron is generally used as a rigid material in order to generate a large amount of impact by adding a rotational force even if a small impact is generated, There is a need to be protected enough for durability, even if the above reasons are necessary. The present invention aims to provide a solution for protecting the turntable (T) from external factors as a solution to the occurrence of such a problem.

In this regard, the present invention is characterized in that a protective film may be provided on the outer surface of the turntable T by applying and curing a protective agent. It is particularly preferable that such a protective film is provided in the seat portion 11 of the turntable T body 1, the moving slit 12, the guiding projection 13, the guided groove 21 of the pressing finger 20, .

Such a protective film must be easily provided, must be excellent in adhesion, further have improved anticorrosiveness, fire resistance, and rustproofing property, and further, it is required to have improved waterproof property through improved fabricating and water repellent treatment due to rapid curing .

The protective composition for the protective layer of the present invention which provides the above effect is prepared by mixing 100 parts by weight of phenoxyethyl acrylate, 150-250 parts by weight of polyester acrylate, 30-40 parts by weight of 2,4,6-trimethylbenzoyldiphenylphosphine oxide 50 to 100 parts by weight of polyvinyl acetate, 1 to 5 parts by weight of 2-methyl-4-isothiazolin-3-one, 25 to 35 parts by weight of silica airgel, 10 to 30 parts by weight of 3-glycidoxypropylmethyldimethoxysilane, 30 to 50 parts by weight of sodium silicate, 10 to 70 parts by weight of hydroxyethyl acrylate, 30 to 60 parts by weight of ethylsilicone, 1 to 5 parts by weight of ethylenediamine tetraacetate, 0.5 to 2.5 parts by weight of tetraethoxysilane .

Phenoxyethylacrylate (Phenoxyethylacrylate) was first used as an acrylate monomer, and it was confirmed that it was most suitable for the present composition among various acrylate monomers because it has adequate flowability and excellent heat resistance. The amount of each composition to be described below will be described based on 100 parts by weight of the phenoxyethyl acrylate.

Next, (Polyesteracrylate) polyester acrylate is used as an acrylate oligomer, and it has been confirmed that it is most suitable for the present composition among various acrylate oligomers since it has proper adhesiveness, strength and durability. It is preferable that such polyester acrylate is used in an amount of 150 to 250 parts by weight. It has been confirmed that adhesion, strength and durability of the protective film are remarkably lowered when the polyester acrylate is used out of the above range. As a result of repeated experiment, it was confirmed that the most preferable amount was 200 parts by weight.

Next, (2,4,6-trimethylbenzoyldiphenylphosphineoxide) 2,4,6-trimethylbenzoyldiphenylphosphine oxide is used as an initiator, and when used with the above-mentioned phenoxyethyl acrylate and polyester acrylate among various initiators It was confirmed that the most excellent physical properties can be secured. It is preferable that 30 to 40 parts by weight of 2,4,6-trimethylbenzoyldiphenylphosphine oxide is used. When the amount of the 2,4,6-trimethylbenzoyldiphenylphosphine oxide is less than 30 parts by weight, it is difficult to form a sufficient radical. When the amount is more than 40 parts by weight, , And remarkable deterioration was observed in the curing time and the flowability when the composition was used out of the above range. As a result of repeated experiment, it was confirmed that the most preferable amount was 35 parts by weight.

Next, (Polyvinylacetate) polyvinyl acetate is used as a fixing agent for improving the fixing strength of the protective agent, and the amount thereof is preferably 50 to 100 parts by weight. If it is used in an amount of less than 50 parts by weight, there is a problem that the protective agent can not be adhered well due to a decrease in the flexibility of the coating film, and when it is used in excess of 100 parts by weight, the dryness of the protective agent deteriorates. As a result of repeated experiments, it was confirmed that the optimum amount of use was 70 parts by weight.

Next, (2-Methyl-4-Isothiazoline-3-one) 2-methyl-4-isothiazolin-3-one is used as an antiseptic agent and its amount is preferably 1 to 5 parts by weight. When used outside of the above-mentioned composition range, there are no obvious problems, but repeated experiments have shown the most remarkable effect in the composition range.

Next, (Silica Aerogel) silica airgel is used as a refractory agent and a thermal insulation agent to improve the refractory and thermal insulation based on diffused pores. This silica airgel has a very high specific surface area with a porosity of 80 to 99.87% and a pore size of 1 to 50 nm. Since the silica airgel has high transparency and low thermal conductivity as a transparent low-density material, it has high potential as a transparent insulating material Lt; / RTI > Such a silica airgel is preferably subjected to hydrophobic treatment on its surface because its gel structure and physical properties are lowered when it absorbs water, and the amount thereof is preferably 25 to 35 parts by weight. There is a problem in that optimum physical properties can not be secured when the composition is used out of the above-mentioned composition range. In particular, when it is used in excess of 35 parts by weight, economical efficiency is lowered. As a result of repeated experiment, it was confirmed that the most preferable amount was 30 parts by weight.

Next, (3-Glycidoxypropylmethyldimethoxysilane) 3-glycidoxypropylmethyldimethoxysilane is used as a coupling agent for improving the interfacial adhesion of each composition, particularly polymer compositions, to improve physical properties, and the amount thereof is 10 to 25 parts by weight desirable. When used out of the composition ratio, the binding force between the compositions is not effectively expressed. As a result of repeated experiment, it was confirmed that the most preferable amount was 20 parts by weight.

Next, sodium silicate sodium silicate is added as a rust inhibitor, which is advantageous in that it is relatively economical among various rust inhibitor compositions. The sodium silicate is preferably used in an amount of 30 to 50 parts by weight. If the sodium silicate is used in an amount less than 30 parts by weight, it is difficult to ensure anticorrosive performance. If the sodium silicate is used in an amount exceeding 50 parts by weight, economical efficiency is lowered. The optimum amount to be used is 40 parts by weight in consideration of both economy and rustproofing ability.

Next, (Hydroxyethylacrylate) hydroxyethyl acrylate is added as an adhesion promoter, and hydroxyethyl acrylate is employed because it has an advantage of excellent curability. The use amount of 10 to 70 parts by weight is less than 10 parts by weight. When the amount is more than 70 parts by weight, volatility increases and toxicity is increased. As a result of the repeated experiment, it was confirmed that the most preferable amount was 40 parts by weight.

Next, (Ethylsiliconate) Ethyl Siliconate is added as a strength enhancer to increase the corrosion resistance, impact resistance, resistance to magnetic (scratch resistance) and surface hardness of the protective film, and the average particle size is 10 to 20 nm And the amount thereof is preferably 30 to 60 parts by weight. If it is used in an amount less than 30 parts by weight, sufficient strength can not be obtained. When it is used in an amount exceeding 60 parts by weight, the possibility of cracking after application increases due to excessive rigidity. As a result of the repeated experiment, it was confirmed that the most preferable amount was 40 parts by weight.

Next, (Ehtylenediaminetetracetate) Ethylenediaminetetraacetate is used as an adsorption enhancer, and enhances the adsorption force during the initial construction of the protective film, thereby improving the adhesion. The preferable amount of ethylenediamine tetraacetate to be used is 1 to 5 parts by weight, and when it is used out of the above-mentioned composition range, the adsorption strengthening effect is not adequately expressed.

Next, (Tetraethoxysilane) tetraethoxysilane is added to enhance the water repellency and water repellency of the protective film by hydrolysis and condensation, and to improve the anticorrosive property, and it is preferably 0.5 to 2.5 parts by weight, and when it is used less than 0.5 part by weight Water repellency, water repellency and anticorrosive property are insignificant, and when it is used in excess of 2.5 parts by weight, the workability is lowered. As a result of repeated experiment, the most preferable amount of use was confirmed to be 2 parts by weight.

The protective film of the present invention having the above-described composition and composition range is not required to be limited in drying temperature, and can be easily cured because it is not flowable, and therefore it is easy to provide a protective film and furthermore has excellent anticorrosive properties , And has an anticorrosive property, and further has an advantage of being excellent in water resistance.

[Example]

In order to test the effect of the protective composition according to the present invention and the protective layer formed thereon, 500 g of the protective agent (500 g) mixed in the composition ratio of each of Examples 1 to 3 was coated on the test block, After forming a protective film on the outer surface of the block, experiments were conducted according to Experimental Examples 1 to 4 using the respective test blocks (see the component table below).

[Ingredient List]

[Experimental Example 1]

As a result of measuring the UV curing time of each of the test blocks of Examples 1 to 3, it was measured as about 1 minute for Example 1, about 1 minute 30 seconds for Example 2, and 2 minutes for Example 3. [ Therefore, in all of Examples 1 to 3, the overall curing time was short, and in all the examples, rapid curing proceeded without flow.

[Experimental Example 2]

As a result of performing a cross-cut test on each of the test blocks of Examples 1 to 3, no peeling occurred in the error range of 1% in all of Examples 1 to 3 (peel ratio <1%).

Thereafter, scratching experiments were carried out through scratchers having irregular protruding portions on the outer surfaces of the test blocks of Examples 1 to 3, respectively. As a result, in Example 1, most of the protective film was broken. In Examples 2 and 3, The breakage of the protective film did not occur at all (breakage rate less than 5%).

Therefore, it was confirmed that Examples 2 and 3 were superior to Example 1 in adhesion strength and strength of the protective film.

[Experimental Example 3]

Experiments were carried out on the outer surfaces of the test blocks of Examples 1 to 3 through a torch for 10 minutes to directly spray the flame. As a result, in Examples 1 and 2, some combustion and melting occurred. In Example 3, however, Only the protective film was not burned at all.

Therefore, it can be confirmed that Example 3 is superior in fire resistance and heat insulating property to Examples 1 and 2.

[Experimental Example 4]

Water was sprayed on the outer surface of each of the test blocks of Examples 1 to 3 for 6 hours. After removing the protective film and examining the degree of internal invasion of the test block, a small amount of moisture was detected in Examples 1 and 2, No moisture was detected at all.

Therefore, it was confirmed that Example 3 was superior in water resistance to Examples 1 and 2.

While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

I: Intermediate product G: O-ring groove
A: Processing device
T: Turntable
1: Body 11:
12: moving slit 13: guiding projection
20: press finger 21: guide groove
211: first inclined portion 212: narrowed portion
213: second inclined portion 214: wide portion
22: pressure side 23:

Claims (4)

A method of processing a metal product having an O-ring,
A designing step of generating design data such that the dimensions and shape of each part of the metal product from the metal material are realized, the metal product including o-ring grooves for the provision of the o-rings;
A machining step of machining the metal material according to the design data to produce an intermediate product including the O-ring groove; And
An O-ring groove forming step of disposing the intermediate product on a turntable and rotating the turntable to perform a mapping operation on the O-ring groove;
Lt; / RTI &gt;
Wherein the turntable includes a body having a mounting portion on which the intermediate product is disposed, and a fixing means provided on the body and fixing the intermediate product to the mounting portion,
Wherein the body further comprises a plurality of moving slits radially disposed about the seating portion,
Wherein the fixing means comprises a pressing finger provided on each moving slit and moving back and forth along the moving slit,
Wherein the pressing finger includes a to-be-guided groove provided on a side surface thereof,
Wherein the guided grooves include a first inclined portion provided on the opening side and narrowed toward the inner side, a narrowed portion extending inwardly from the first inclined portion, an inner side extending from the narrowed portion, And a wide portion extending inward from the second inclined portion,
Wherein the inner wall of the moving slit is provided with a guide projection projecting inward and having a shape corresponding to the guide groove. delete delete delete

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