JPS6160733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a spinning spindle blade.

Conventional methods for forming spindle blades include cutting a round bar into a desired shape. However, such cutting requires a large number of cutting man-hours and wastes material, and since the shape is elongated, it cannot withstand heavy cutting, therefore cutting takes time, and when the cutting speed is increased, the surface condition is poor. Cutting resistance causes internal distortion,
As a result, it becomes curved during quenching, requires a large amount of material to be removed during polishing, requires a large number of polishing steps, and has drawbacks such as increased processing costs and high prices.

Recently, rotary forging, or swaging machines, has been used as a means of processing bar-shaped materials.
The range is materials with low tensile strength, such as low carbon steel that has been subjected to tempering treatment, and the area reduction rate due to swaging is up to about 70%. It has drawbacks such as causing defects.

Furthermore, in the swaging process, a strong rotational force is applied to the material as the swaging head rotates, resulting in flaws in the gripping portion or twisting of the material.

In view of the above, the present invention provides a novel spindle blade forming method that facilitates swaging of spindle blades that are difficult to plastically deform, such as high carbon bearing steel, and prevents the occurrence of scratches at the gripping portion, that is, chucking. We aim to provide the following.

Further, according to the present invention, the upsetting process by swaging is combined with the standard spindle blade manufacturing process,
By dividing the bobbin into a bobbin fitting taper part that fits the top hole of the bobbin being used, the required spindle blade can be installed for different bobbins for each customer by simply replacing the fitting taper part upsetting mold. This has the effect of making it possible to provide

The present invention will be specifically described below based on embodiments shown in the drawings.

Figure 1 shows a known rotary saging machine S.
, a plurality of hammers 12 are symmetrically provided at the front end of a hollow main shaft 11.
A mold 3 is installed inside the hammer 12, and rollers 15 arranged in a row inside the casing 14 are installed on the outer periphery of the hammer 12, and as the main shaft 11 rotates, the hammer 12 is expanded outward by centrifugal force. At the same time, when it comes into contact with the roller 15, it is pushed by the roller 15 and moves inward, so that the workpiece, that is, the blade material A, is pressed and deformed to form it into the required size.

Fig. 2 is a processing diagram of a spindle blade according to the method of the present invention, in which the material A is cut into a predetermined length taking into account the elongation due to swaging, and the outer diameter is the central large diameter part 21 of the blade (Fig. f). Use a round bar with dimensions as close to that as possible. spindle blade 2
As shown in Fig. f, there is a reduced taper portion 2 below the approximately central large diameter portion 21 into which the warb (not shown) is fitted.
6. A lower bearing support part 22 including a straight intermediate bearing part 23, a tapered step bearing part 24, and a tapered part 25 connecting these parts, and a bobbin fitting that fits into a bobbin top hole (not shown) at the upper end. 27 and a bobbin fitting part 28 having a gently inclined shape that connects the central large diameter part and the bobbin fitting part 27.
The lower bearing support portion 22 has a stepped smaller diameter than the central large diameter portion 21.

In the present invention, in the first step, the intermediate bearing portion 23 of the small diameter portion from the large diameter portion 21 is rough-hammered to have an inclined portion that can be swaged, and in the second step, the bearing is supported with a predetermined size. 22. That is, in the first step shown in FIG.
3, and a tapered part 33 that connects these two parts to enable upsetting, and the guide part 31 is preferably made as long as possible to prevent misalignment. .

Then, one end of the blade material A is gripped by means described later, and pushed into the mold 3a for a predetermined length, and an upsetting operation is performed to obtain a rough material Aa whose lower part is roughly hammered.

Next, in the second step shown in FIG. A stepped molded portion 37 is formed to connect the intermediate bearing portion, and the stepped portion 37 is sloped as steeply as possible for the work (for example, around 36 degrees).

Using this mold 3b, the rough punched material Aa is pushed in, and by upsetting, the lower part of the blade 2 is finished into a material Ab having a predetermined shape and size.

Next, in the third step shown in FIG. d, a bobbin gripping part 28 on the upper part of the blade is formed. That is, the mold 3c is provided with a bobbin gripping part forming part 38, and the lower bearing support part 22 of the material Ab is gripped and pressed.
Formed by upsetting work to obtain material Ac.

Next, in the fourth step, the mold 3d has a molding part 3 on the inner surface that fits the bobbin fitting part 27 at the upper end of the blade.
9, and performs upsetting work in the manner described above.

Next, centers C1 and C2 of a required angle are formed on both ends using a suitable centering machine to obtain a blade molded product 2.

FIG. 3 is a related layout diagram of the entire apparatus for automatically carrying out each of the above steps, including a supply conveyor 4 for material A, a swaging machine S1 for the first step, a swaging machine S2 for the second step, and a reversing machine. device T,
Swaging machine S3 for the third process, swaging machine S4 for the fourth process, delivery conveyor 5,
Following the conveyor, centering machines Ca and Cb are installed in sequence, and each swaging machine is equipped with a material gripping device H.
1, H2, H3, and H4 (hereinafter collectively referred to as simply H) are arranged oppositely, and a material conveying means D is provided between them. The sending section 4a of the supply conveyor 4 and the receiving section 5a of the sending conveyor 5
The swaging machines and reversing devices T are arranged at the same pitch, respectively, and the conveying means D includes at least three material support members 6a, 6b, 6b, 6c……
(hereinafter collectively referred to as 6) is attached to a mounting base 71 with the same pitch as the above-mentioned pitch, and the mounting base 71 is mounted on a traveling base 72 via a lifting means 73 having a fluid cylinder 74 and a link mechanism 75. The carriage 72 is provided with a reciprocating drive means 76, such as a fluid cylinder, for reciprocating between the pitches.

Further, as shown in FIG. 6, the support member 6 is provided with left and right pairs of gripping claws 61c and 61b, each of which is attached to the shaft 6.
2a and 62b, and a trochanter 63 at the other end.
a, 63b, and is engaged with a pressing block 65 that is raised and lowered by an opening/closing cylinder 64, and the shaft 63
Although not shown, springs a and 63b are provided with restoring springs. Then, as the pressing block 65 rises, the claw 6
The tips of the claws 1a, 61b grip the material A, and as the block 65 descends, the restoring spring releases the tips of both claws, and the support members 6a, 6b...
There are traverse cylinders 77a, 77b, 77c...
... (hereinafter generically referred to simply as 77), and is reciprocated by the cylinder in a direction perpendicular to the mounting base 71, that is, in the direction of the material gripping devices H1, H2, H3, . . .

As shown in FIGS. 7 to 9, the gripping device H mainly includes a collection chuck 82 operated by a fastening fluid cylinder 81, and a top cover 83 at the tip is configured to guide and support the material in each process. As shown in FIGS. 7 and 9, the stepped portions 83a and 83b support the central step 26 of the material, respectively.
to support the material so that it is not pushed in during the swaging process.

However, in the first and second steps, as shown in FIG. 8, a steel ball 85 is held in a stopper 84, and the tip of the material is supported by the ball.

This gripping device H rotates in the rotational direction of the swaging machine at a rotation speed slower than that, and grips the material gently, in other words, allows the material to follow rotation due to the swaging process to a certain extent. The rotary cylinder 87 is equipped with a sprocket wheel 86 that is interlocked with an appropriate drive source M (Fig. 3), and a bearing 89 is installed in the case 88. A fastening fluid cylinder 81 is attached to the proximal end, and the top cover 83 is attached to the distal end. The inner hole at the tip of the rotating cylinder is made into an inclined surface that fits the tip of the collector chuck 82, and the chuck is fitted and supported.The operating rod 90, which is connected to the rod of the cylinder 81, is connected to the rotating cylinder 87 by a key 91. , a connecting tube 9 screwed into the rear end of the chuck 82;
2 are engaged with each other by a ring 93, and as the operating rod 90 moves back and forth, the connecting cylinder 92 moves forward and backward together, but the connecting cylinder is held so as to freely rotate. This is because, as will be described later, normally the collet chuck 82 and the connecting tube 92 are rotated together with the rotary tube 87, but when the material is rotated at a speed higher than the rotational speed of the rotary tube 87 during swaging processing, the collet chuck 82 and the connecting tube 87 are rotated. The tube 92 is designed to follow this to some extent.

A support rod 94 is provided at the rear end of the material supported by the collection chuck 82, and a pressure spring 95 is interposed between the rod 94 and the operating rod 90, and the spring 95 constantly pushes the material through the rod 94. It is designed to apply pressing force to the FIG. 9 shows another example of the rod 94, in which the rod 94a is attached to the lower step bearing portion 24 of the material.
It is provided with the same taper hole 94b as the one shown in FIG. 96 in Figure 7
is a fluid cylinder for advancing and retracting the gripping device H relative to the swaging machine.

Next, the molding method of the present invention having the above configuration will be explained.

A large number of materials A loaded on the supply conveyor 4 are sequentially moved and held at a supply position for one material by appropriate means in the delivery section 4a.

In this state, the material conveying means D moves one pitch to the left by the operation of the reciprocating cylinder 76, and the left end support member 6a reaches the above-mentioned feeding section 4a as shown in FIG. The machine stops, operates the opening/closing cylinder 64 based on the start command to open the gripping claws 61a and 61b, raises the claws using the elevating means 73, pinches the material A, and closes the claws with the cylinder 64 to grip it. . Next, the cylinder 76 moves back to the position of the swaging machine S1 for the first step, and the traverse cylinder 77 supplies the material A to the opposing material gripping device H1.
After that, the gripping claws 61a and 61b are opened, and the elevating means 7
3 to lower the support member 6 and move the traverse cylinder 7
7 and the operation of the reciprocating drive cylinder 76, the support member 6a is moved below the sending portion 3a and stopped. This allows the first swaging machine S
A second support member 6b is located at a position facing the second swaging machine S2, and a third support member 6c is located at a position facing the second swaging machine S2 and downward.

The gripping device H1 grips the supplied material A with the collection chuck 82, and moves the material A to the first swaging machine S1 by operating the advance/retreat cylinder 96.
feed on the side. The machine S1 is equipped with the aforementioned mold 3a, and performs rough punching on the lower half of the material A. In this case, the present invention is characterized in that the material is loosely gripped and rotated in the rotational direction of the swaging machine at a slower speed.For example, when the rotational speed of the swaging machine is 360 rpm, the gripping device H gives a rotation of approximately 40rpm.

After the rough punching is completed, the gripping device H1 moves backward and stops at an intermediate position. Next, the conveying means D operates the elevating means 73 to raise the support members 6a, 6b, and so on.
The above material (in this case, the material as described above)
Hold Aa). In this case, the support member 6a grips the material A in the manner described above. After that, the gripping device H1 is moved back.

The conveying means D supplies the material A gripped by the support member 6a to the first gripping device H1 in the manner described above, and supplies the material Aa gripped by the second support member 6b to the second gripping device H2. The second gripping device H2 also loosely grips the material Aa in the manner described above, and while rotating at a slow speed pushes the material Aa into the second swaging machine S2 to finish the lower half of the blade, that is, the lower bearing support portion. The material is Ab.

The material Ab is sent to the reversing device T by the third support member 6c in the manner described above, and is reversed front to back by appropriate means, and the inverted material Ab is received by the support member 6d and supplied to the third gripping device H3. death,
In the same manner, the third swaging machine S3 is used to finish the bobbin gripping part, and although the explanation is omitted, the swaging machine S4 is used to finish the bobbin fitting part 27, and the conveying means D is supported. It is sent out to the sending conveyor 5 by the member 6f.

According to the invention, each gripping device H is rotated in the direction of rotation of the swaging machine and at a slower speed, and the collection chuck is rotated in the direction of rotation of the swaging machine and at a slower speed, and the collection chuck is rotated in the direction of rotation of the swaging machine. Since the material is gripped to allow slipping, the material will not be twisted due to the rotation of the swaging machine, and the gripping surface will not cause defects due to slipping while being gripped. This is done automatically and continuously, which is extremely efficient, and because the lower bearing support part, which has a small diameter with a step, requires two processes: rough striking and finish striking, it does not undergo plastic deformation like high carbon bearing steel. Since the swaging process of the difficult spindle blade is made easy, and the bobbin fitting part 27 to be fitted into the bobbin top hole is formed in the fourth step, the first to third steps are fixed. For spindle blade types (for example, the standard 7-inch lift type), there is no need to change the mold, and only the mold for the fourth process needs to be changed according to the customer's bobbin shape, making it extremely efficient. It has advantages such as being able to be manufactured efficiently and at low cost.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view of the mechanism of the swaging machine, Fig. 2 is a processing process diagram of the spindle blade, Fig. 3 is an overall layout diagram showing an embodiment of the present invention, and Fig. 4 is an explanatory diagram of the mechanism of the swaging machine.
5 is a front view of the conveyance means, FIG. 6 is a vertical cross-sectional view of its support member, FIG. 7 is an overall vertical cross-sectional view of the first embodiment of the material gripping device, and FIG. 8 is a vertical cross-sectional view of the first embodiment of the material gripping device. FIG. 9 is a longitudinal cross-sectional view of the main part of the second embodiment of the same as above, and FIG. 9 is a longitudinal cross-sectional view of the main part of the third embodiment of the same. A...Material, D...Material transport means, H1, H
2, H3...gripping device, S1, S2, S3... swaging machine, 2... spindle blade,
3... Mold, 4... Material supply conveyor, 5... Delivery conveyor, 6... Support member, 61a, 61
b...Gripping claw, 64...Opening/closing cylinder, 73...
Lifting means, 76... Reciprocating drive cylinder, 77...
Cylinder for traverse, 81... Cylinder for fastening, 82
...Collection chuck, 96...Cylinder for advancing and retracting.

Claims (1)

[Claims] 1. A first step of roughly punching a lower predetermined length approximately to the diameter of the intermediate bearing part using a blade material cut to a predetermined size; The second step is finishing punching, and the third step is finishing punching the bobbin fitting part, which is gently sloped from the central large diameter part toward the tip. The fourth step is finishing hammering of the material, and the fifth step is attaching the required center to both ends. The gripping device, which mainly consists of a collect chuck, rotates slower than the rotational direction of the swaging machine, and the gripping device suppresses the rotation of the material by the swaging machine. A method for forming a spindle blade for spinning, which is characterized by allowing.