KR20100060872A - Coiling and cutting apparatus for manufacturing ring gear blank - Google Patents

Abstract

PURPOSE: A coiling and cutting apparatus for manufacturing a ring gear blank is provided to secure high precision by effectively reducing inner diameter deviation during coiling. CONSTITUTION: A coiling and cutting apparatus for manufacturing a ring gear blank comprises a feed roller(20), a main bending roller(30), a plurality of molding guide rollers(40), a bar(10), and an overlap guide roller(50). The bar passes through the main bending roller and the molding guide rollers. The overlap guide roller guides a ring shape made by overlap. A coiling process and a cutting process are performed at the same time so that ring gear blanks can be manually and automatically produced one by one.

Description

Coiling and cutting apparatus for manufacturing ring gear blank}

The present invention relates to a coiling and cutting device for producing ring gear blanks, and more particularly, to semi-finished products for engines (BLANK) and start ring gears, mass rings, mass rings, ring flanges for axle housings, and the like. In order to obtain a more accurate inner diameter during manufacturing, the tapering process is performed simultaneously with the coiling process of forming an overlap on the same circumference of the rectangular tapered bar to enable manual / automatic flow production one by one.

In general, the ring gear is a main component installed on the outer circumferential surface of the flywheel or coupled with the drive plate to rotate the crankshaft bite with the pinion of the starting motor, and the ring gear is mounted to efficiently transmit the driving force of the engine. It is installed to mesh with the output shaft of the transmission is rotated together.

When manufacturing a blank for a ring gear, which is a step prior to processing a gear meshed with an output shaft of a transmission on an outer circumferential surface of a conventional ring gear, first, a wire rod is rolled to produce a square tapered bar, and then approximately 5000 A long bar of ㎜ is bent (= coiled) by four to seven continuous windings in the form of a spring (= coil) having a predetermined diameter using a bending machine, and then the inner diameter of the coil is expanded to obtain a uniform dimension. After the cutting process, the cutting unit is cut into a dedicated cutting machine to produce a certain amount of overlap, and thus the cut ends are welded to produce a single ring in order to obtain a relatively uniform inner diameter.

At this time, the bending (coiling) process is a work to make the weight to move the worker in a good shape, in order to secure a clean cutting surface in recent years to cut a variety of cutting methods, that is, round saw, water jet, band saw blade, gas cutting method The cutting operation using a cutting machine is commercially available. The most widely used round saw cutting method has the advantage that the cutting surface can be obtained by the cutting process, while the cutting speed of the saw blade is slowed down. It has the defect that the saw blade is damaged even in the process stagnation and the small shaking during the coiling cutting.The waterjet cutting method has the disadvantage that the equipment is expensive and the rust occurs because of the water remaining during the cutting, and the band saw cutting method is quite High productivity but difficult to achieve precise inner diameter, and gas cutting Can not be obtained relatively clean cut surface, and also require an apparatus for collecting pollution it generates a gas, and there are environmental hazards has been an obstacle to practical use.

In particular, since the coiling process and the cutting process cannot be performed at the same time, the work force must be arranged because a worker for straightening the bar by straightening the bar by straightening the coil through the vertical / horizontal leveler must be arranged. It requires a lot, and the coiling process takes about 12 seconds, while the cutting process takes about 40 seconds, so bottlenecks occur in the cutting process, which limits the increase in production. It is an important factor. In conventional coiling, manufacturing tolerances are largely generated due to intermittent roll slip, and the defective rate is increased. The existing method produces 3 to 7 coilings. Inevitably there is an unfinished curve section at the beginning and end, which is cut off when making individual rings. There have been many problems such as a lot of scrap due to the production cost rises.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the present invention is a semi-finished product for engine (BLANK) and start ring gear, mass ring (MASS RING), T / Q RING, axle housing ring flange In order to obtain a more accurate inner diameter during the manufacturing process, such as the coiling process of forming an overlap of the square tapered bars on the same circumference and the cutting process simultaneously, the manual / automatic flow production is possible one by one, resulting in shortening of the manufacturing labor. It can improve the work efficiency, greatly increase the productivity, effectively reduce the deviation of the inner diameter dimension when coiling, ensure high precision, and reduce the consumption of raw materials as the scrap is generated only at the first and last stages. Coiling and cutting station for ring gear blank manufacturing which can effectively reduce the manufacturing cost The purpose is to provide value.

In order to achieve the above object, the present invention, while unwinding the coil produced continuously in the cold rolling process, while the calibration roller is tilted during calibration through the vertical / horizontal leveler, the straightened bar is controlled by the required length and transported. A ring wrapped around the supply roller, which is installed in order to be installed, the main bending roller which is spaced in front of the supply roller, and is supplied with the bar passing through the supply roller, and rotates, and which is installed on the main bending roller, and which passes through the main bending roller. Composed of a plurality of forming guide rollers to rotate to form a shape, and an overlap guide roller for guiding the ring forming the overlap as the bar passing between the main bending roller and the plurality of forming guide rollers passing through the coil The ring process and the cutting process The ring gear blank for making coiling and cutting device according to one at a time characterized in that the manual / automatic production flow is provided.

In addition, when the rectangular tapered bar passes through the calibration roller, the upper calibration roller is characterized in that the entire area is in contact with the bar is tilted to be corrected.

In addition, the plurality of forming guide rollers are disposed and installed in the coiling direction from the center of the upper end of the main bending roller, and any one of the forming guide rollers of the plurality of forming guide rollers is controlled by a servo motor to form a precise inner diameter. It is characterized by that.

In addition, the overlap guide roller is characterized in that the bar is installed so as to face the lower portion of the main bending roller so that the bar can be cut after forming an overlap while rising through the gap.

As described above, the present invention uses a rectangular tapered bar to obtain a more accurate inner diameter in the manufacture of semi-finished products for engines, start ring gear, mass rings, T / Q rings, axle housing ring flanges, and the like. In addition to the coiling process of forming an overlap on the same circumference, the cutting process is carried out at the same time to enable manual / automatic flow production one by one. It is possible to effectively reduce the deviation of the inner diameter during coiling to ensure high precision, and to reduce the production cost by effectively reducing the amount of raw materials used as the scrap is generated only at the first and last stages. It is a very useful invention that has greatly improved the efficiency and reliability of the.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention for achieving the above object will be described in detail.

1 is a perspective view sequentially showing the operating state of the coiling and cutting device for producing a ring gear of the present invention, Figure 2 is a front view showing the operating state of the calibration roller during the calibration of the bar according to the invention, Figure 3 after cutting It is a perspective view which shows the ring in which the overlap was formed, FIG. 4 is explanatory drawing of the planar state which shows the ring formed in the ellipse without forming the overlap after cutting, and FIG. 5 is a front view for demonstrating the state at the time of cutting.

In the coiling and cutting device for manufacturing a ring gear blank of the present invention, while unwinding a coil manufactured continuously in a cold rolling process, the calibration rollers 70 and 72 are tilted during calibration through a vertical / horizontal leveler. A supply roller 20 is installed to control and transport the straightened and straightened rectangular tapered bar 10 to the required length. The rectangular tapered bar 10 is a straightening roller 70 or 72. When passing through the upper calibration roller 70 is provided with a structure in which the entire area is tilted so that the entire area in contact with the bar 10 to be corrected.

In addition, in front of the supply roller 20 is provided a main bending roller 30 is rotated by receiving a bar 10 passing through the supply roller 20 is spaced a predetermined distance, the main bending roller 30 The upper part of the plurality of forming guide rollers 40 to rotate to form a ring shape wrapped around the bar 10 passing through the main bending roller 30 in the coiling direction from the center of the upper end of the main bending roller 30 It is arranged and installed.

At this time, it is preferable that at least one or more supply rollers 20 are installed so that the bar 10 can be continuously supplied without waiting for the operation to be stopped, and among the plurality of forming guide rollers 40 described above. One of the molding guide rollers 40 is controlled by a servo motor (not shown) to form a precise inner diameter. The precise inner diameter is such that the length and the driving of the servo motor are transferred from the supply roller 20. It can be formed as it is synchronized.

In addition, as the bar 10 passes through the main bending roller 30 and the plurality of forming guide rollers 40, the ring OL is formed in the lower portion of the main bending roller 30. The overlap guide roller 50 for guiding is opposed to the bar 10 so as to penetrate therebetween to form an overlap to form a ring 60 and to be cut by a cutting machine (not shown). Installed and configured.

1 to 5, the present invention configured as described above, when the coiling and cutting process for the ring gear blank manufacturing process proceeds while unwinding the coil produced continuously in the cold rolling process vertical / horizontal leveler The upper straightening roller 70 of the straightening rollers 70 and 72 is tilted so that the entire surface is in contact with the bar 10, and the straightened rectangular tapered bar 10 is rotated by the required length by the control. The main bending roller 30 and the main bending roller 30 which are installed and rotated to be spaced a predetermined distance in front of the supply roller 20 continuously through the supply roller 20 and are disposed from the top to the center of one side of the main bending roller 30. It continues to be passed while passing through the plurality of forming guide rollers 40 formed in a ring shape, and continues to face the lower portion of the main bending roller 30 Through the overlap guide rollers 50 installed so as to rise, the shape of the ring 60 which forms the overlap OL while rising through the cutting machine is cut by the cutting machine. This can easily proceed to a possible state.

At this time, the reason for forming the overlap (OL) when manufacturing the ring 60 is that if the overlap is not formed a deviation of the inner diameter is generated, the ring 60 does not form an overlap, the gap between both ends of the ring 60 When the opening is formed, as shown in FIG. 3, as the ring 60 is formed as an ellipse, an error occurs when manufacturing a ring gear for securing a precise inner diameter, as well as the opening by flash butt welding (Flash butt welding). If the spacing increases during welding, welding defects are generated and additional work is needed to close the opening.

In other words, if the overlap OL is not formed, the two cut portions are not butt together, and thus, fusion is hardly performed during flash butt welding, so when a high load is applied, breakage occurs, and a portion is welded while the opening is welded. Since the base material portion forming the circumference of is lost by the welding spark and pressure welding, the inner diameter is reduced, and as the roundness decreases, the above overlap is compensated for the loss caused by welding and pressure welding, and the roundness can be maintained.

For example, in order to manufacture a ring having an inner diameter of 100 mm, a length of 100 mm x 3.141592, that is, 314 mm is required, but 100 mm x 3.14 + 10 mm when the amount of flying (sprayed) during welding is 10 mm. As described above, the opening of the ring should not be generated during the manufacture of the ring to help the formation of the circle, and the welding amount for each cross-sectional area during the manufacture of the ring should be controlled.

In addition, while cutting the thin cross-sectional area, for example, Φ5 mm is relatively easy in the cutting process, the maximum cross-sectional area of 20 × 20 mm (width × length) is cut at regular intervals, so that before and during the welding, the fracture surface is separated from the welding spark. This is eliminated by pressure welding. At this time, since the fracture surface generated during shearing after welding should not remain, the shear and fracture surface must exist within one side of 3mm, and the deformation occurs during cutting as shown in FIG. 4. In order to prevent the cutting surface (C) is fixed in front of the cutting surface (C) of the bar (10 not to move) and then fixed.

In addition, the reason why the roundness is improved when manufacturing the ring 60 by the present invention is to calculate the amount that the fracture surface is eliminated by welding spark and pressure welding in advance when the overlapping part is welded at the same inner diameter. The uniform inner diameter can be easily secured by cutting after welding, because the overlapping part disappears after being worked on the same circumference, and the roundness of 0.4 ~ 1.2 mm is generated in the general method. When the present invention is applied, the roundness can be improved to about 0.4 to 0.8 mm.

In addition, in the related art, a coil manufactured continuously in a cold rolling process is unrolled while uncoiler is calibrated through a vertical / horizontal leveler to straighten the bar 10 and a worker who performs a coiling operation. Three people including one person and one worker doing the cutting work were required. However, when the device of the present invention is applied, one person can carry out calibration, coiling, and cutting work, thereby greatly reducing workforce. On average, the coiling work takes 12 seconds and the cutting work takes 40 seconds, resulting in a bottleneck in the cutting process. Throughput can be greatly increased.

In addition, the inner diameter is very important when manufacturing the ring 60 according to the present invention, but the conventional coiling has a defect rate of 0.5% due to the large manufacturing tolerances due to the intermittent roll slip phenomenon, The apparatus of the present invention allows a precise inner diameter to be obtained during manufacture, thereby effectively reducing the defective rate.

In the conventional method, an unfinished curve section is generated at the first and last stages inevitably generated when 3 to 7 coilings are made, and this part is cut into scraps when manufacturing individual rings. Although a lot of scrap has been generated, which leads to an increase in manufacturing cost, when the device of the present invention is applied, scrap is generated only at the first and last stages, thereby minimizing scrap and effectively reducing manufacturing costs.

1 is a perspective view sequentially showing the operating state of the coiling and cutting device for producing a ring gear of the present invention

Figure 2 is a front view showing the operating state of the calibration roller during the calibration of the bar according to the invention

Figure 3 is a perspective view showing the overlap ring formed after cutting

Figure 4 is an explanatory view of a planar state showing a ring formed of an ellipse without forming an overlap after cutting

5 is a front view for explaining a state at the time of cutting

Explanation of symbols on the main parts of the drawings

10; Bar 20; Supply roller

30; Main bending roller 40; Forming guide roller

50; Overlap guide roller 60; ring

70,72; Calibration roller OL; Overlap

Claims (4)

In the cold rolling process, the uncoiler is continuously released and the straightening rollers 70 and 72 are tilted while being calibrated by vertical / horizontal levelers. A supply roller 20 which is installed to make A main bending roller 30 which is spaced apart in front of the supply roller 20 and is supplied with the bar 10 passing through the supply roller 20 to rotate; A plurality of forming guide rollers 40 installed at an upper portion of the main bending roller 30 and rotating to surround the bar 10 passing through the main bending roller 30 and to form a ring shape; As the bar 10 passing between the main bending roller 30 and the plurality of forming guide rollers 40 is passed, the overlap guide roller 50 is configured to guide the ring shape in which the overlap OL is formed. Coiling and cutting device for the manufacture of ring gear blanks, characterized in that the coiling process and the cutting process at the same time to perform the manual / automatic flow production one by one. The upper straight roller 70 is tilted so that the entire area contacts the bar 10 and is calibrated when the rectangular tapered bar 10 passes through the straight rollers 70 and 72. Coiling and cutting device for producing ring gear blanks, characterized in that. The molding guide roller of claim 1, wherein the plurality of molding guide rollers 40 are disposed in a coiling direction from a center of an upper end of the main bending roller 30, and the molding of any one of the molding guide rollers 40 is performed. Guide roller (40) is a coiling and cutting device for producing a ring gear blank, characterized in that controlled by a servo motor to form a precise inner diameter. The lower portion of the main bending roller 30 according to claim 1, wherein the overlap guide roller 50 forms an overlap while the bar 10 rises through the bar 10 to form an overlap. Coiling and cutting device for producing a ring gear blank, characterized in that installed so as to face.

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