JPS6021137A - Production of needle or the like by rolling method - Google Patents

Abstract

PURPOSE:To enable simultaneous working of a large number of needles or the like and to reduce working stage and cost by subjecting a piano wire to surface working such as conical heading, pointing, etc. by a rolling method thereby forming the stem part of the needles or the like. CONSTITUTION:A piano wire 1 is inserted into a flat heade 3 and a pointer 4 by which said wire is worked to a blank material 2 for a needle or the like having alternately a conical head part 7 and a pointed head part 8. Such material 2 is fed to a drawing device, by which the material is drawn to form a needle point having a prescribed size. The material is then formed with a string groove 16 by a string groove working device 15 and thereafter one side part of a needle stem part 19 is plain-milled by a plain milling device. A large number of the needles or the like are simultaneously worked by the above-mentioned method, by which the stage is reduced and the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing needles based on a rolling method, which has various advantages, instead of the conventional polishing method.

[Prior art]

Conventionally, the manufacturing of needles requires multiple steps as described below, and each processing step involves various problems and causes high costs, so there has been a demand for improvement in the manufacturing method. That is, as shown in Fig. 9, a needle material (bJ) is prepared by cutting piano wire (a) to a predetermined size by polishing with a grindstone to form a countersunk portion tc+ so that one end of the needle material (bJ) forms a countersunk shape, and the other end is A pointed head (dl) was formed by polishing with a whetstone to form a pointed point.

In addition, as shown in Fig. 10, countersunk parts (C1) are formed by grinding with a grindstone at both ends of the needle material (bl), and grooves facing the upper and lower molds are formed so that the central part of the material has a small diameter. As shown in the vertical cross-sectional view, the ptos type (el) was used to press-form into a pointed shape, and then a deburring operation was performed to form each pointed head (dl). It had the following shortcomings.

■Requires a lot of work, more than 5 steps, to finish.

■Material loss is large as the material is rubbed off by polishing.

■Multiple dust is generated due to metal and abrasive grains.

■The whetstone wears out a lot.

■There is a lot of noise.

■The polished surface becomes highly heated, causing decarburization of the carbon network and changing the material of the needle material.

Next, as shown in the figure, the countersunk and pointed needle material is pounded by a distraction machine in a press mold [f] as shown in the longitudinal cross-sectional view, which consists of two molds. Although the edges of the side surfaces are removed by rotation and rotational stretching is performed, the disadvantages of this processing method are as follows.

■There is a lot of noise.

■Mold consumption is large.

■Since a large amount of oil flows, a lot of oil is consumed and a lot of oil dust is generated.

■It takes a long time to adjust and change the mold. In particular, adjusting the mold requires a high level of skill and requires a specialist.

As shown in Figures 12a to 12c, a thread hole (g) having a shape as shown in a partially enlarged view is provided near the tip of the stretched needle material (b).

Next, as shown in FIGS. 13 to 15, in order to provide thread grooves (hl) in the needle material 1b, grooves are formed by cutting with a cutter or by press working, but most of the grooves are formed by cutting. , these drawbacks are as follows.

■When using the cutting method, a large amount of cutting waste is produced.

■The cutter wears out a lot.

■When using the press method, the press requires a large amount of power and is noisy.

■When using the cutting method, burrs remain on the inner surface of the groove and on both sides of the groove, and the finished groove bottom is not smooth. In addition, in the case of the press method, cracks occur due to the press, and polishing is required in the next step regardless of the method.

■In the case of the cutting method, the cross-sectional shape of the groove tends to be distorted, and it is impossible to cut shapes other than right angles between the inner wall and the bottom of the groove. It was not possible to form a groove with a particular groove ring shape.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing needles that eliminates the drawbacks of conventional methods for manufacturing needles.

[Structure of the invention]

In the manufacturing process of needles, the present invention includes countersunk processing by rolling, pointed processing, distraction processing, grooving processing,
This method of manufacturing needles is characterized by including a step of surface treatment such as hand finishing.

Next, the present invention will be explained in detail by way of example with reference to the drawings.

〔Example〕

Figure 1 shows a rolling method using piano wire (11) cut to an appropriate length, which has a pair of parallel rotating shafts +51 and +61, and is installed alternately at equal intervals on the shafts. The above-mentioned processing device shows the blood soaking processing device (3) and the pointed head processing device (4).The piano wire (1) is simultaneously subjected to countersunk processing by rolling and processing to attach the pointed end by rolling. Then, they are processed into a shape as shown in the figure, each having alternating shaped portions (7) and pointed portions (8).

Figure 2 shows the countersinking processing device (3), with the rotation axis f
51. (A pair of rollers each fixed to 61 + 91
．． Consists of QOI. The roller (9) has a continuously changing curvature, for example, a shape similar to the cross-sectional shape of a conch shell, and has a V-shaped blade (11) on its outer periphery. Also roller (9)
It is also possible to form it in the shape of a disk mounted eccentrically with respect to the rotating shaft (5).

The roller 00) is disc-shaped and has a similar 7-shaped blade (1
2).

The sharp head attachment processing device (4) is similar to the countersinking processing device (3), so a description thereof will be omitted.

The example in Fig. 3 is a flattening processing device (3) and a distraction processing device (
13a) are arranged alternately, so that the piano wire (1) is countersunk and stretched at the same time. The needle material (2) obtained through this step is sent to a second stretching device (13b) for performing the second stage of stretching. In this way, the drawing process is carried out in two or more stages to form a tip of a predetermined size, and then a thread hole is formed using conventional techniques.

Next, the thread groove (16) is formed into the needle material (2) using a rolling type thread groove processing device (15) as shown in FIGS. 4 and 5.
Provided at the tip of the needle. The thread groove processing device (15) is used to process needle materials (
It consists of a pair of rollers: a disk-shaped grooving roller (17) with a rounded outer peripheral edge that contacts the roller 21, and a bearing roller (18) having a pulley-shaped grooved outer peripheral edge. As shown in FIG. 6, the thread groove (16) of the needle material (2) has a rounded cross section at its periphery and bottom, so thread breakage does not occur.

Figures 7 and 8 show the needle handle part (19
) with the - side section flattened, and (20) is the handle. Except that the hand processing device has a flat shaping roller in which the outer peripheral edge of the groove cutting shaping roller (17) has the same thickness as or slightly larger than the outer diameter of the handle (19) of the needle material (2). have a similar structure.

As detailed above, in the present invention, a pair of press rollers are used to form the main body of the needle by processing the needle material from a piano wire of a predetermined size by rolling method in one or multiple stages. countersunk processing, pointed processing, distraction processing,
Perform surface processing such as grooving and hand finishing.

According to the present invention, since the rolling method is used, there are the following effects.

〔Effect of the invention〕

■ A large number of needle materials can be processed at the same time, such as countersunk processing and pointed head processing, or countersunk processing and stretching processing, which shortens the process and reduces costs.

■ No noise.

■ The countersunk part and pointed head are formed by rolling the needle material, so there is no wastage of material.

■ Since it does not require consumables such as a grindstone and does not generate dust, it requires less materials, improves the working environment, and is sanitary.

■ For example, the sewing machine needle of the present invention manufactured by the rolling method has a smooth surface, a U-shaped groove, a strong shaft, a smooth inner surface of the groove, no thread breakage, and no decarburization during processing. It has low quenching strength, low material fatigue during processing, and high mechanical strength.

[Brief explanation of drawings]

FIG. 1 is a conceptual front view showing countersunk processing and pointed head attaching processing of needle materials according to the method of the present invention, and their processing equipment, and FIG. 2 is a front view of the pointed head taken along line nn in FIG. FIG. 3 is a side view of the dipping processing device, and FIG.
The figure is a conceptual front view showing the grooving process and the processing apparatus according to the present invention, FIG. 5 is a side view taken along line V-V in FIG. 4, and FIG. 6 is a sectional view of the needle tip after grooving process. Figure 7 is a plan view showing the handle after hand processing, Figure 8 is Figure 7 ■-■
9 is a flowchart showing the conventional countersunk processing and pointed head hanging processing of needle material by polishing, and FIG. 10 is the conventional countersunk processing and pointed head attaching processing of needle material. FIG. 11 is a flowchart showing the drawing process of needle material, and FIG. 12a is another example flowchart showing
The figure shows i! after thread hole formation. l [i A conceptual front view showing the material, Fig. 12b is an enlarged front view of the thread hole portion, Fig. 12c is an enlarged plan view of the thread hole portion, and Fig. 13 is a conceptual diagram of the needle material after fabrication. 14 is a plan view, and FIG. 15 is a sectional view taken along the line xv-xv in FIG. 13. (11-Piano wire (21-Needle material) (31--One plate attaching processing device (41--One point end attaching processing device +5), +61--Rotating shaft (71-Counter attaching part (8)
)・-Pointed head +91--Roller QO whose curvature changes continuously)
-Roller (11), (12)・-Sword (13a),
(13b) - Stretching device (14) ~ Thread hole (15)
- Thread groove processing device (16) - Single groove (17) - Grooving shaping roller (18) - Single bearing roller (19) - Handle (20
) --Ippiratori part (A-Piano wire (b)-Needle material
tc+-countersunk part (dl--pointed head (el, (fl-press type (g)
l-1-thread hole (hl-thread hole patent applicant Katsuhiko Fukuyama agent Masu Kodo (and 2 others)

Claims (1)

[Claims] 1. In the manufacturing process of needles, rolling is characterized by including the steps of countersunking by rolling, point hooking, stretching, grooving, and surface processing such as hand finishing. Method of manufacturing needles by method.