JPH0642004U - Parallel fitting and chuck device using the same - Google Patents

Abstract

(57) [Summary] [Structure] Attach the screw rod 14 to the base member 11,
The parallel fitting 10 is configured. Scroll chuck 20
The mounting groove 2 between each top claw 23 on the chuck body 21 of
5 is formed. 3 in each mounting groove 25 with mounting bolts 28
Attach the individual parallel fittings 10. The bottom surface 11a of the base member 11 and the tip end surface 12a of the screw rod 14 are formed parallel to each other, and the distance between these surfaces is the same for all three parallel fittings 10. The processed end surface 24b on one end side of the work 24 is pressed against the tip surface of the screw rod 14 to move the claw 2
The work 24 is fixed by 3, and the other end side of the work 24 is end-cut. [Effect] When the one end face 24b is cut and the other end face 24c is cut after the end face 24b is cut, the parallelism between the end faces 24b and 24c in the end face cutting from both end sides can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paralleling metal fitting and a chucking device using the metal fitting, and in particular, in a cutting device such as a lathe or a frying machine, it is possible to accurately obtain the flatness of each surface when cutting a workpiece from both ends. The present invention relates to a paralleling metal fitting and a chuck device using the metal fitting.

[0002]

[Prior art]

 When processing a work from both ends in a cutting machine such as a lathe or a milling machine, first, the work is fixed to a chuck and processed from one end face side. After this processing is completed, the work is removed and the end surface side that has been processed is held by the claws, and the other end surface side is processed. In this way, it is necessary to change the work piece for machining from both end surface sides, and the parallelism between the machining surface from one end surface side and the machining surface from the other end surface side may not be parallel. For this reason, it is also practiced to process the soft jaws to improve the accuracy of holding the work and the accuracy of the parallelism of the processing surfaces from each end surface side. Also, in the milling machine, when processing from the both end surface sides, two pieces of so-called yokan are placed in parallel or T-shape on the upper surface of the chuck body, so that both end surface sides are It is designed to increase the parallelism of the machined surface during machining.

[0003]

[Problems to be solved by the device]

 However, the soft jaw is expensive, and it is necessary to process the contact surface in accordance with the work, so that there is a problem that efficient cutting cannot be performed. Further, in the case of a work whose holding length by the claw is 10 mm or less, the holding force becomes weak and the work stability at the time of cutting is deteriorated, and similarly there is a problem that the parallel accuracy becomes poor. In addition, when the parallelism is obtained by using the square members, there is a problem that the parallel accuracy is lowered depending on how the square members are placed.

An object of the present invention is to provide a paralleling metal fitting capable of improving the parallelism accuracy of the processed surfaces in machining from both end surfaces and a chuck device using the paralleling metal fitting. .

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 is such that at least three chucking devices are attached to the chucking body between the claws by a mounting device having a plurality of claws that are movable in the radial direction of the chucking body. In the paralleling metal fitting, the paralleling metal fitting is composed of a base member, a projecting member erected at one end of the base member, and an elongated hole formed in the base member. During use, after attaching each parallel fitting to the chuck body, the tip of each protruding member is cut to make the bottom surface and the end surface of the base member parallel, and the tip surface of this protruding member is Press the end face of and hold the work with the claw. This improves the parallelism of each end face in the end face cutting process from both end face sides.

According to the second aspect of the present invention, at least three chuck devices having a plurality of claws that are movable in the radial direction of the chuck body are mounted on the chuck body between the claws via mounting bolts. In the parallel metal fitting, a base member, a protruding member standing on one end of the base member, and an elongated hole formed in the base member constitute a paralleling metal member, and the bottom surface of the base member and the tip surface of the protruding member are formed. And are formed in parallel, and the distance between the bottom surface and the tip surface is the same for each metal fitting.

According to a third aspect of the present invention, a screw hole is formed at a mounting position of the projecting member of the base member, and the projecting member is formed with a male screw portion to be mounted in the screw hole through a step surface. The distance between the surface and the tip surface of the projecting member is the same for each projecting member.

According to a fourth aspect of the present invention, a screw hole is formed at a protruding member mounting position of the base member, the protruding member is a screw rod attached to the screw hole, and a lock nut for fixing the screw rod to the screw hole. It is composed of and.

According to a fifth aspect of the present invention, in a chuck device having a plurality of claws that are movable in the radial direction of a chuck body, a base member, a protruding member that is erected at one end of the base member, and a base member. The paralleling metal fitting is composed of the long hole formed in the above, and the bottom surface of the base member of this paralleling metal fitting and the tip end surface of the protruding member are parallel, and the distance between these two surfaces is the same. At least three pieces are provided, and on the chuck body side, at least three mounting grooves are formed between the claws in the radial direction of the chuck body and in the circumferential direction of the chuck body, and at least three mounting grooves are formed. Screw holes are formed in the mounting grooves. After forming, the base member of the parallel metal fitting is fixed in the mounting groove with the mounting bolt, the end surface of the work is pressed against the tip surface of each protruding part material, and the work is held by the claws. Is.

Further, in the invention according to claim 6, a scale for indicating the position of the protruding member is provided on the edge portion of the chuck body where the mounting groove is formed, and the base member is used for indicating the position of the protruding member. It is provided with an indicator line.

[0011]

[Action]

 The work is held by the claw, and one end face side of the work is cut in this state. Next, the work is removed from the chuck, and the base member is positioned so that the tip of the projecting member is positioned at the position where it abuts the machined surface of the work and is fixed by the mounting bolt. Thereafter, the work is pressed against the tip of the projecting member, the work is fixed by the claw, and the other end face side is cut. Since the bottom surface of the base member and the tip surface of the protruding member are parallel to each other, and the distance between the bottom surface and the tip surface is set to be the same in each parallel fitting member, the work piece is set to 3 mm. It is held parallel to the plane perpendicular to the center line of the chuck by the point support. As a result, even if the work is changed and the machining is performed from both ends, these machining surfaces become parallel, and this parallelism is firmly held by the parallel metal fittings, improving the parallelism of the machining edges. To do.

[0012]

【Example】

 FIG. 1 is a perspective view showing a paralleling metal fitting of the present invention. The parallel fitting 10 is composed of a base body 11, a protruding member 12 vertically mounted on one end of the base body 11, and an elongated hole 13 formed in the base body 11. The base body 11 is composed of a strip plate, and the end portion side to which the projecting member 12 is attached is tapered. A threaded hole 17 is formed in the tapered end portion 16 in a direction orthogonal to the bottom surface of the base body 11.

The protruding member 12 is composed of a screw rod 14 and a lock nut 15, and is of a soft jaw type whose protruding amount can be set arbitrarily. The screw rod 14 is attached to the screw hole 17 of the base body 11 and is fixed by a lock nut 15 so as not to loosen.

FIG. 2 is a perspective view showing a scroll chuck 20 using three parallel fittings 10. As is well known, the scroll chuck 20 rotates a scroll built in a chuck body 21 by means of a pinion (both not shown) to radiate a master pawl (master jaw) 22 meshing with a scroll to the chuck body 21. It is moved in a line direction, and the top jaw (top jaw) 23 presses the cylindrical work 24 from three directions.

A metal fitting mounting groove 25 is formed in the chuck body 21 between the top claws 23 in the radial direction of the chuck body 21. As shown in FIG. 3, three metal fitting mounting grooves 25 are formed at 120 ° intervals in the circumferential direction of the chuck body 21. The width W1 of the mounting groove 25 is set to be substantially the same as or slightly wider than the width W2 of the base body 11 of the parallel fitting 10 (W1 = W2 + 0.1 mm), and the groove depth is, for example, 2 to 5 mm. is there. Therefore, the parallel fitting 10 is slidably movable in the mounting groove 25 and is held in the mounting groove 25, so that its rotation is restricted. Screw holes 26 and 27 are formed in the mounting groove 25 along the center line thereof. The screw hole 26 is used when the outer diameter of the work is small, and is for attaching the parallel fitting 10 with the protruding member 12 thereof facing inward. The screw hole 27 is used when the outer diameter of the work is large, and is used to attach the paralleling metal fitting 10 with the protruding member 12 thereof facing outward. Mounting bolts 28 are attached to the screw holes 26 and 27, whereby the parallel fitting 10 is fixed in the mounting groove 25.

As shown in FIG. 3, a scale line 30 is formed on one of the edges of the metal fitting mounting groove 25 of the chuck body 21. The scale line 30 is, for example, in 1 mm increments, and a numeral 31 is engraved every 10 mm. In addition, instruction marks 32a and 32b for instructing the scale are engraved on the side of the base member 11 of the parallel fitting 10. By making the scales designated by the instruction marks 32a and 32b the same as that of the respective paralleling metal fittings 10, the respective projecting members 12 can be easily arranged on the same circumference of the chuck body 21, and the respective parallelizing metal pieces can be arranged. The metal fitting 10 can be easily positioned. The instruction mark 32a is used when processing a work having a small diameter. The instruction mark 32b is used when processing a large-diameter workpiece. In this case, the parallel fitting 10 is mounted in the mounting groove 25 in the direction opposite to that shown in FIG. 3, so that the indicator mark 32b on the opposite side indicates the scale line 30. In this way, instead of sharing the graduation lines 30, dedicated graduation lines may be formed on both side edges of the mounting groove 25.

Next, the operation of this embodiment will be described. As shown in FIG. 4, in order to process one end surface 24a side of the work 24, first, the work 24 is fixed by the top claw 23. In this state, the work 24 is cut into a desired shape. For example, as shown in FIG. 4, cylindrical bodies having different diameters are concentrically stacked, and the upper end face 24a and the step face 24b are end face cut. In this state, the parallel fitting 10 may be removed from the chuck 20, or may be retracted and fixed to a position that does not hinder the holding of the work 24 as shown in FIG.

After cutting the end faces of the end face 24 a and the step face 24 b, the work 24 is removed from the chuck 20. After that, the mounting bolt 28 is loosened and set at a position where the protruding member 12 abuts the step surface 24 b of the work 24, and then the mounting bolt 28 is tightened to fix the paralleling metal fitting 10 to the chuck body 21. In the present embodiment, since the parallel jaw metal fitting 10 of the soft jaw type is used, the chuck 20 is rotated while the parallel metal fitting 10 is fixed, and the tip of the screw rod 14 as the protruding member 12 is cut to form the protruding member. The tip end surface 12a of 12 and the bottom surface 11a of the base member 11 are made parallel to each other.

Next, as shown in FIG. 5, the work 24 is fixed by the top claw 23 in a state in which the processed step surface 24 b on the end surface side is pressed against the front end surface 12 a of the protruding member 12. After that, the other end surface 24c side of the work 24 is cut. Since the workpiece 24 is supported at three points by the tip surface 12a of each protruding member 12 of the parallel projecting metal fitting 10, by performing cutting in this state, a new machining end surface 24c is machined first, and the machining end surface 24a, It can be formed parallel to 24b. When this parallel accuracy was measured with a micrometer, the unevenness was within the range of 10 microns, and it was found that sufficient parallel accuracy was obtained in normal cutting.

In addition, in the above-described embodiment, the processing in which the parallelism of each end face is emphasized in the end face cutting has been described, but in addition to this, when performing cylindrical cutting, in the state shown in FIG. The body 21 and the flange portion 40 that holds the body 21 can be fixed by loosening the mounting screws 41, and in this state, the chuck body 21 is hit with a wood hammer or the like to perform centering. This allows the outer diameter cutting surfaces to be machined concentrically when machining from both end surfaces.

Further, in the above-described embodiment, the projecting member 12 is constituted by the screw rod 14 so as to be detachable and easily reworked. However, in addition to this, as shown in FIG. A parallel fitting 52 in which the member 50 is fixed to the base plate 51 by welding or the like may be used. In this case, the protruding member 50 may be formed of a round bar instead of being formed of a square bar. In addition to welding, the protruding member may be formed by bending.

As shown in FIG. 7, the parallel fitting 60 may be composed of a base member 61 and a plurality of projecting members 62, 63, 64 selectively screwed thereto. In this case, the projecting members 62, 63, 64 are formed with some typical dimensions (for example, 3, 6, 9 mm, 5, 10, 15 mm, etc.) and are made to fit the size of the work, The protruding members 62, 63, 64 are selected and used. Then, the mounting male screw portion 65 is made smaller than the diameter of the main body of each of the protruding members 62, 63, 64, and a step surface 66 is formed between this and the protruding members 62, 63, 64. The screw 64 is screwed into the screw hole 67 of the base member 61. The length of the step surface 66 and the length of the tip surface 68 are the same, and they are set to be the same. Then, by attaching those having the same length to each base member 61, it is possible to easily form the paralleling metal fitting having a desired height. Reference numeral 69 indicates a notch for engaging a wrench, and by engaging a wrench with this and turning the projecting members 62, 63, 64, the projecting member can be screwed into the screw hole 67 of the base member 61. .

Further, in the above embodiment, the chuck device of the lathe has been described as an example. However, the chuck device of the milling machine can be similarly attached and used. As a result, there is no need to parallelize with square materials, and even beginners can reliably cut parallel surfaces with high accuracy.

Further, in the above-mentioned embodiment, the contact portion of the top claw is not specially processed and used in a normal state. However, as shown in FIG. The work end surface of the workpiece may be pressed against the contact surface side of the projecting member by the component force of the inclination angle of the work contact surface 71 when the top claw 70 is tightened. This ensures that the work is pressed against the contact surface, so that the parallelism can be further improved. The inclination degree θ may be, for example, about 1/100 to 2/100, and it is desirable that the top claw 70 be made of the same material as the soft claw so as not to scratch the work. .

Further, although the scroll chuck has been described as an example in the above embodiment, the present invention may be applied to a single-acting chuck having four claws.

[0026]

[Effect of device]

 As described above, according to the present invention, the paralleling metal fitting is composed of the base member, the projecting member standing upright at one end of the base member, and the elongated hole formed in the base member. These are attached individually to the chuck body, and after that, the tip of each protruding member is machined to make the bottom surface and the tip surface of the base member parallel. By holding the workpiece with the claws while pressing, the parallelism of each machined surface in the end face machining can be improved when one end face is held and then the other end face is cut after machining. it can.

Moreover, since the work piece is pressed by the projecting member so as not to move in the axial direction of the main shaft, the work piece is more reliably held and is stable compared to the conventional case where the work piece is held only by the claws. It can perform various cutting processes. In particular, in the cutting of a thin work piece, it is possible to improve the parallel accuracy of the processing end surface.

Further, by attaching the protruding member to the base member by means of the male portion having a diameter smaller than that of the protruding member, the protruding member can be removed. Thus, by preparing a plurality of types of projecting members having different lengths, it is possible to select and use these depending on the size of the work. Therefore, with a simple structure of one base member and plural types of protruding members, parallel work can be performed on workpieces of all sizes.

Further, by forming a threaded hole in the base member, attaching a threaded rod to this, and locking it with a lock nut, it is possible to easily configure the parallel fitting. Moreover, a new type of threaded rod is cut into a desired length, attached to each base member, fixed to the chuck body, and the tip of each threaded rod is cut. Since it is used, it is not necessary to purchase an expensive soft nail as in the past and perform cutting processing according to the outer diameter of the work, and the equipment cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a paralleling metal fitting according to the present invention.

FIG. 2 is a perspective view showing a scroll chuck to which the parallel fitting is attached.

FIG. 3 is a front view of the same.

FIG. 4 is a side view showing a state in which a work is attached to a scroll chuck in order to process one end surface side.

FIG. 5 is a side view showing a state in which a work is attached to the scroll chuck in order to process the other end surface side.

FIG. 6 is a perspective view showing another parallel fitting.

FIG. 7 is a perspective view showing another parallel fitting.

FIG. 8 is a side view showing a work contact surface of a top claw of the scroll chuck.

[Explanation of symbols]

 10, 52, 60 Paralleling metal fittings 11, 51, 61 Base member 12, 50, 62, 63, 64 Projecting member 13 Long hole 14 Screw rod 15 Lock nut 17 Screw hole 20 Scroll chuck 21 Chuck body 23 Claw 25 Mounting groove 28 Mounting bolt 30 Scale lines 32a, 32b Instruction mark

Claims (6)

[Scope of utility model registration request] 1. In a chuck device having a plurality of claws which are movable in the radial direction of a chuck body, at least three parallel fittings attached to the chuck body between the claws via mounting bolts, and a base member, and A paralleling metal fitting comprising a projecting member standing upright at one end of the base member and an elongated hole formed in the base member. 2. In a chuck device having a plurality of claws that are movable in the radial direction of the chuck body, at least three parallel fittings that are mounted on the chuck body between the claws via mounting bolts, and a base member, A projecting member standing upright at one end of the base member and a paralleling metal member are formed from a long hole formed in the base member, and the bottom surface of the base member and the tip end surface of the projecting member are formed in parallel,
Paralleling metal fittings characterized in that the distance between the bottom surface and the tip surface is the same for both paralleling metal fittings. 3. The parallel fitting according to claim 1 or 2, wherein a screw hole is formed at a position where the base member is attached to the projecting member, and the projecting member is formed with a male screw portion to be attached to the screw hole via a step surface. A paralleling metal fitting characterized in that the distance between the step surface and the tip end surface of the protruding member is the same for both protruding members. 4. The parallel fitting according to claim 1 or 2, wherein a screw hole is formed at a protruding member attachment position of the base member, and the protruding member includes a screw rod attached to the screw hole.
A parallel fitting which is configured by a lock nut for fixing this to a screw hole. 5. A chuck device having a plurality of claws movable in a radial direction of a chuck body, wherein a base member, a projecting member standing upright at one end of the base member, and an elongated hole formed in the base member are parallel to each other. At least three parallel metal fittings are provided on the chuck body side so that the bottom surface of the base member of the parallel metal fitting and the tip surface of the protruding member are parallel and the distances between these surfaces are the same. At least three mounting grooves are formed between the claws in the radial direction of the chuck body and in the circumferential direction of the chuck body, and screw holes are formed in the mounting grooves. A chuck device characterized in that a base member of a paralleling metal fitting is fixed therein, an end face of a work is pressed against a tip end face of each projecting member, and the work is held by the claws. 6. The chuck device according to claim 5,
A chuck device characterized in that a scale line for indicating the position of the protruding member is provided on the edge portion of the chuck body where the mounting groove is formed, and an instruction mark for indicating the position of the protruding member is provided on the base member. .