KR102171497B1 - Apparatus for manufacturing inner fin of oil cooler - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing an inner fin for an oil cooler, which can maintain the processing pitch-specific distance between protrusions and recesses when inner pins, of which the cross sections are formed in a continuous protrusion and recess shape, are manufactured, and can increase quality uniformity. In a progressive mold, the upper surface of a strip is punched by an upper mold on punching grooves of a lower mold to manufacture the inner pins, of which the cross sections are formed in the continuous protrusion and recess shape. The lower mold includes: a left lower mold fixed and provided on the left side of the right surface of the punching grooves in a cross-sectional view; a right lower mold which is formed on the right side of the right surface of the punching grooves in the cross-sectional view and is elastically supported to be able to move vertically so that the left surface of the right lower mold makes surface contact with the right surface of the left lower mold, and which has position fixing grooves formed on the right sides of the punching grooves to be recessed so that recesses formed at intervals of one pitch are inserted thereinto and fixed thereto; and a lowering step guide pin which is provided on the front of the left lower mold and elastically supported to be able to move vertically together with the right lower mold, and guides lowering of the upper mold so that a right surface is formed primarily and a left surface is formed secondarily from the recesses of the strip by being linked with the right lower mold when the upper surface of the strip is punched by the punch due to lowering of the upper mold.

Description

Manufacturing device of inner fin for oil cooler {APPARATUS FOR MANUFACTURING INNER FIN OF OIL COOLER}

The present invention relates to an apparatus for manufacturing an inner pin for an oil cooler capable of maintaining a constant distance for each processing pitch between irregularities when manufacturing an inner pin whose cross section is formed in a continuous irregular shape, and improving uniformity of quality. will be.

In general, oil used in automobiles increases the temperature of the oil due to frictional heat during operation, and accordingly, the viscosity of the oil decreases, eventually losing the characteristics of the oil, causing abrasion on the frictional part. .

Therefore, it is necessary to maintain the temperature of the oil at an appropriate temperature, and for this, an oil cooling device, that is, an oil cooler, is installed inside the radiator that cools the engine coolant of a vehicle, and the oil is cooled with the engine coolant flowing inside the radiator.

Conventional oil coolers are described in'oil cooler plate stacked heat exchanger' of Korean Patent Publication No. 10-2011-0076344,'oil cooling device' of Korean Patent Publication No. 10-2003-0051213, and Korean Patent Publication No. 10-2012. -0124306'vehicle heat exchanger' and'engine oil cooler element' of Korean Patent Publication No. 10-1214869.

These oil coolers are provided with cooling fins to increase heat exchange efficiency between the inlet and outlet through which oil enters and exits, and is called an inner fin because these cooling fins are installed inside the oil cooler. For example, it appears in the'oil cooler radiating fins for automatic transmissions' of Published Utility Model Publication No. 20-2008-0006506, and as shown in FIG. 1, the inner fin F is formed in a continuous uneven cross-section. The reason why the inner fin F has an uneven shape is to maximize heat exchange efficiency while forming turbulent flow when oil enters and flows into the oil cooler.

The oil cooler inner pin (IF) having the shape as described above is continuously and stepwise from left to right by unrolling the strip (S) from the strip roll (R) wound in a roll form for mass production. After being supplied and processed, it is manufactured by cutting the required length. For example, as shown in FIG. 2, it includes a progressive mold 10 and a grapher 20 installed in front of the progressive mold 10 to grip the strip S and supply it to the right by a predetermined length.

At this time, the progressive mold 10, as shown in Figs. 2 to 4, supports the lower surface of the strip (S) supplied through the grapher 20, and the lower mold having a punching groove (11a) formed on the upper surface (11), and an upper mold (12) installed to be elevating above the lower mold (11) and provided with a punch (12a) protruding downwardly toward the punching groove (11a). As shown in Figure 2, when the upper mold 12 rises, the strip (S) moves by 1 pitch through the grapher 20, and the upper mold 12 descends as shown in FIGS. 3 and 4 When the punch (12a) hits the upper surface of the strip (S) and is molded into the punching groove (11a), the recess (S1) is formed in the strip (S).

When the concave portion (S1) is continuously formed in the strip (S) by one pitch in this way, the convex portion (S2) is naturally formed between the concave portion (S1) and the concave portion (S1), and the cross section is formed in a continuous irregular shape. The inner pin (IF) is manufactured.

However, in the apparatus for manufacturing an inner pin for an oil cooler according to the prior art described above, as shown in Figs. 3 and 4, the punch 12a hits the upper surface of the strip S and fits into the punching groove 11a. When forming (S1), the left portion (A) and the right portion (B) of the strip (S) on the basis of the concave portion (S1) is introduced into the punching groove (11a), the concave portion (S1) is formed. Therefore, when forming the recess (S1) of the strip (S), the supply distance of the strip (S) must be adjusted through the grapher (20) by calculating the amount of the right part (B) flowing in, the strip through the grapher (20) There is a problem that the supply distance is not constant when supplying (S) continuously. In addition, when forming the concave portion S1 through the continuous punching of the punch 12a, the inflow amount of the left portion (A) and the right portion (B) of the strip (S) is not constant, so that the concave portion (S1) and the concave portion (S1) As the distance between one pitch between them changes little by little, as a result, there is also a problem that the product dimensions are not constant.

An object of the present invention conceived in order to solve the above problems is to maintain a constant distance for each processing pitch between the irregularities when manufacturing an inner pin whose cross section is formed in a continuous irregular shape, and to improve quality uniformity. It is to provide an apparatus for manufacturing an inner pin for an oil cooler capable of.

In order to achieve the above object, the apparatus for manufacturing an inner pin for an oil cooler according to the present invention is an inner in which the cross section is formed in a continuous uneven shape by processing a strip continuously and stepwise supplied from left to right through a progressive mold. In the apparatus for manufacturing an inner pin for an oil cooler for manufacturing a pin, the progressive mold is provided to support a lower surface of the strip, a lower mold having a punching groove formed on an upper surface thereof, and to be elevating and descending above the lower mold, And an upper mold having a punch protruding downward toward the punching groove and punching the upper surface of the strip to form a concave portion by fitting into the punching groove, and the lower mold is based on the right side of the cross section of the punching groove It is elastically supported to move up and down on the right side based on the right side of the cross section of the punching groove so that the left lower mold fixedly installed on the left side and the left side contact the right side of the left lower mold, and 1 pitch on the right side of the punching groove A right lower mold with a depressed position fixing groove in which a preformed concave portion is inserted at intervals and a position fixing groove is formed, and the upper left mold is installed in front of the lower left mold and is elastically supported so as to move up and down together with the right lower mold. When the upper surface of the strip is punched down through the punch, it interlocks with the lower right mold to guide the lowering of the upper mold in two steps so that the concave portion of the strip is first formed on the right side and then the left side is formed secondly. It characterized in that it comprises a step guide pin.

In addition, the lower mold further includes a descending step guide spring for elastically supporting the lower right mold and the descending step guide pin together, and when the upper mold is raised, each of the lower right mold and the descending step guide pin The upper surface is characterized in that it is located higher than the upper surface of the left lower mold.

In addition, when the upper mold is first lowered, the lower surface of the upper mold contacts the upper surface of the lowering step guide pin, and the right side of the punch is molded to the right side of the cross section of the punching groove, which is the upper left end of the lower right mold. Among the concave portions of the strip, a right side in cross section is formed, and when the upper mold is lowered for the second time by a force greater than the spring force of the lowering step guide spring, the upper surface of each of the lower right mold and the lowering step guide pin is the upper surface of the lower left mold. While positioned on the same plane as the punch, the punch is inserted into the punching groove to form a left side in cross-section among the concave portions of the strip.

In addition, the progressive mold is installed in the right direction of the lower right mold, and the pitch is continuously and stepwise moved from left to right by 1 pitch interval between the recess and the recess formed by punching the strip through the punch. It characterized in that it further includes wealth.

In addition, the pitch supply unit is installed to be slidable left and right in the right direction of the lower right mold and elastically supported to the right direction, and the pitch supply frame is installed on the pitch supply frame, based on the pitch supply frame. A pitch subframe that is elastically supported to face upwards, and one end is rotatably installed on an upper portion of the pitch subframe, and a pair of first formed to be held at the other end by one pitch interval between the concave and concave portions of the strip The first rocking member is elastically supported so that the locking hook faces upward, and is installed to protrude downward from the upper mold, and when the upper mold is lowered, the pitch supply frame is slid to the left, and when the upper mold is raised It characterized in that it comprises a pitch moving pusher for sliding the pitch supply frame to the right.

In addition, in the first swing member, the right side of each of the first locking hooks is in contact with the left side of the concave portion of the strip to move the concave portion of the strip in the right direction when the pitch supply frame moves in the right direction, and the first The left side of each of the locking hooks is formed to be inclined, so that when the pitch supply frame moves in the left direction, the other end rotates downward and crosses the concave portion of the strip.

In addition, the progressive mold may further include a pitch supply support unit for limiting the movement of the strip to the left when the pitch supply frame moves to the left by the operation of the pitch supply unit.

In addition, the pitch supply support part, a pitch support frame installed in the left direction of the pitch supply frame and elastically supported upward, one end is rotatably installed on the upper portion of the pitch support frame, and the strip at the other end It characterized in that it comprises a second rocking member that is elastically supported so that the pair of second locking hooks formed so as to be engaged by a 1-pitch interval between the concave portion and the concave portion.

In addition, the second rocking member restricts the concave portion of the strip from moving in the left direction when the right side of each of the second locking hooks is contacted with the left side of the concave portion of the strip and moves in the left direction of the pitch supply frame, The left side of each of the second locking hooks is formed to be inclined, so that when the concave portion of the strip moves in the right direction, the other end rotates downward and guides the concave portion of the strip to move in the right direction.

In the manufacturing apparatus of an inner pin for an oil cooler according to the present invention, when manufacturing an inner pin whose cross section is formed in a continuous uneven shape through a progressive mold consisting of a lower mold and an upper mold, processing between the irregularities through the pitch supply unit and the pitch supply support unit In addition to the lower left mold fixedly installed based on the right side of the punching groove and the lower right mold that is elastically supported upwards and downwards, the inflow of the strip is controlled through the descending step guide pins when punching the recesses of the inner pin. Since it can be set constant, it has the effect of improving the uniformity of quality.

1 is a perspective view showing a generally widely used inner pin for an oil cooler,
2 is a side cross-sectional view showing an apparatus for manufacturing an inner pin for an oil cooler according to the prior art,
3 and 4 are side cross-sectional views showing a process of forming a concave part in a strip while the punch of the upper mold descends from the embodiment of FIG. 2 and is inserted into the punching groove of the lower mold,
5 is a side cross-sectional view showing an embodiment of an apparatus for manufacturing an inner pin for an oil cooler according to the present invention,
6 is a side cross-sectional view illustrating an enlarged view of a pitch supply unit and a pitch supply support unit in the embodiment of FIG. 5;
7 is a side cross-sectional view showing a state just before the upper mold descends and the punch punches the strip in the embodiment of FIG. 5;
8 to 10 are side cross-sectional views showing enlarged main portions of the sequential operation process of the pitch supply unit and the pitch supply support unit in the embodiment of Fig. 7,
FIG. 11 is a side cross-sectional view showing a state in which step 1 lowering of the upper mold is completed in the embodiment of FIG. 7,
FIG. 12 is an enlarged side cross-sectional view showing a state in which the punch forms the right side first among the main portions of the strip in the embodiment of FIG. 11;
13 is a side cross-sectional view showing a state in which the two-step lowering of the upper mold is completed in the embodiment of FIG. 11;
FIG. 14 is an enlarged side cross-sectional view showing a state in which a punch forms a left side of the main part of the strip in an enlarged manner in the embodiment of FIG. 13;
FIG. 15 is a side cross-sectional view showing a state in which the upper mold rises in the embodiment of FIG. 13 and the strip is moved to the right by 1 pitch interval between the recessed part and the recessed part by the operation of the pitch supply part and the pitch supply support part.
16 to 18 are side cross-sectional views showing an enlarged view of a sequential operation process of a pitch supply unit and a pitch supply support unit in the embodiment of FIG. 15.

Hereinafter, a preferred embodiment of an apparatus for manufacturing an inner pin for an oil cooler according to the present invention will be described in detail with reference to the accompanying drawings.

In the apparatus for manufacturing an inner pin for an oil cooler according to the present invention, as shown in Figs. 5 to 18, the strip (S) that is continuously supplied in stages from left to right is processed through the progressive mold 100 to have a continuous cross section. An apparatus for manufacturing an inner pin for an oil cooler that manufactures an inner pin (IF) formed in an uneven shape, and the progressive mold 100 includes a lower mold 200 and a punch 310 having a punching groove 210 formed thereon. The upper mold 300 is included, and the lower mold 200 includes a left lower mold 220, a right lower mold 230 and a descending step guide pin 240. In addition, a pitch supply unit 400 and a pitch supply support unit 500 may be further included in order to continuously and stepwise supply the strip (S).

First, the progressive mold 100 is a mold for gradually processing a material supplied in a continuous and stepwise manner to form a final shape into a specific shape.In the present invention, each inner pin IF is formed in a continuous uneven shape. The final inner pin (IF) is to be formed by continuously processing each recess (S1) by a certain length in stages.

This progressive mold 100 includes a lower mold 200 and an upper mold 300 as shown in FIG. 5, and the lower mold 200 supports the lower surface of the strip S, and a punching groove on the upper surface 210 is formed, the upper mold 300 is installed so as to be elevated above the lower mold 200, and a punch 310 protruding downward toward the punching groove 210 is provided to the strip The upper surface of (S) is punched and molded into the punching groove 210 to form a recess (S1).

Here, the lower mold 200 includes a left lower mold 220, a right lower mold 230 and a descending step guide pin 240 as shown in FIG. 5. The lower left mold 220 is fixedly installed on the left side with respect to the right side of the cross section of the punching groove 210. In addition, the right lower mold 230 is elastically supported so that the left side is in contact with the right side of the left lower mold 220 so as to be movable up and down on the right side with respect to the right side of the cross section of the punching groove 210, and the punching groove On the right side of 210, a position fixing groove 231 in which a preformed concave portion S1 is inserted at an interval of 1 pitch is inserted and a position fixing groove 231 is depressed. At this time, the descending step guide pin 240 is installed in front of the lower left mold 220 as shown in FIGS. 7 and 11 to 14 and is elastically supported so as to move up and down together with the lower right mold 230 , When punching the upper surface of the strip (S) through the punch (310) with the lowering of the upper mold (300), the concave portion of the strip (S) is primarily formed on the right side by interlocking with the lower right mold (230). After that, the lowering of the upper mold 300 is guided in step 2 so that the left side is formed secondly.

In addition, the lower mold 200 further includes a lowering step guide spring 250 for elastically supporting the lower right mold 230 and the lowering step guide pin 240 together as shown in FIG. 5, When the upper mold 300 is raised, the upper surface of each of the lower right mold 230 and the lowering step guide pin 240 is positioned higher than the upper surface of the lower left mold 220.

More specifically, when the upper mold 300 first descends, as shown in FIGS. 11 and 12, the lower surface of the upper mold 300 contacts the upper surface of the lowering step guide pin 240, and the punch 310 The right side of) is fitted to the right side in cross-section of the punching groove 210, which is the upper left end of the lower right mold 230, to form the right side in cross-section among the recesses (S1) of the strip (S), and guide the descending step. As shown in FIGS. 13 and 14 when the upper mold 300 is lowered by a force greater than the spring force of the spring 250, the upper surface of each of the lower right mold 230 and the lowering step guide pin 240 is The punch 310 is inserted into the punching groove 210 while being positioned on the same plane as the upper surface of the lower left mold 220 to form the left side in cross section among the recesses S1 of the strip S. do.

That is, in the case of an apparatus for manufacturing an inner pin for an oil cooler according to the prior art, when forming a recess (S1) on the strip (S) when referring to FIGS. 3 and 4, the recess (S1) at a time when the punch (12a) descends. Because it is formed, the left part (A) and the right part (B) of the strip (S) are punched together by a punch (12a) and introduced into the punching groove (11a), and at this time, a plurality of recesses (S1) are continuously formed. If so, there is a problem in that the amount of inflow of the left portion (A) and the right portion (B) of the strip (S) is not constant, and the spacing between the concave portion (S1) and the concave portion (S1) is also not constant.

On the other hand, in the case of the apparatus for manufacturing an inner pin for an oil cooler according to the present invention, as shown in FIGS. 11 to 14, the lower mold 200 has a separate left lower mold 220 and a right lower mold 230. , At this time, the lower left mold 220 is fixedly installed on the left side with respect to the right side of the punching groove 210, but the right lower mold 230 is movable up and down on the right side with respect to the right side of the punching groove 210 It is elastically supported. In addition, the lower right mold 230 has a depressed position fixing groove 231 in which a preformed concave portion S1 is inserted into the right side of the punching groove 210 at intervals of 1 pitch to be fixed, and the right lower mold ( A descending step guide pin 240 that is elastically supported to move up and down together with 230 is installed.

Therefore, as shown in FIGS. 11 and 12, when the upper mold 300 is first lowered, the lower surface of the upper mold 300 descends to the upper end of the lower right mold 230 and the lowering step guide pin 240, At this time, the punch 310 forms a right side of the concave portion S1 of the strip S. Here, since the lower right mold 230 has a position fixing groove 231 spaced to the right by 1 pitch interval and depressed, a preformed concave portion S1 is inserted into the position fixing groove 231 at an interval of 1 pitch. The position is fixed. Accordingly, when the right side of the recesses (S1) is formed by the punch 310, only the left side (A) of the strip (S) is introduced during punching, as shown in FIG. 12, and the deformed recesses (S1) and convex portions (S2) ) Side of the strip (S) is to be prevented from entering.

In addition, as shown in FIGS. 13 and 14, when the upper mold 300 is lowered by the second, the upper surface of the lower right mold 230 and the lowering step guide pin 240 is flush with the upper surface of the lower left mold 220. At this time, the punch 310 forms the left side of the recesses S1 of the strip S, and finally the shape of the punching groove 210 together with the right side of the recesses S1 formed during the first descent. The recessed portion S1 is formed. Accordingly, even when the left side of the concave portion S1 is formed by the punch 310, as shown in FIG. 14, only the left portion A of the strip S is introduced during punching, and the deformed concave portion S1 and the convex portion The strip (S) on the (S2) side is not allowed to flow.

As described above, while forming the right side and the left side of the concave portion S1 in two steps, only the left side A of the strip S is introduced based on the punching groove 210 when punching, and the deformed right side concave portion S1 And without damaging the convex portion S2, the 1-pitch interval between the concave portion S1 and the concave portion S1 of the inner pin IF can be formed uniformly, thereby improving uniformity of quality.

Through the above-described configuration, one pitch interval between the recesses S1 and the recesses S1 of the inner pin IF is uniformly formed, and at the same time, the supply distance of the strip S, that is, a continuous and stepwise 1 pitch interval It is necessary to secure the moving distance, and this can be achieved through the pitch supply unit 400 as shown in FIGS. 5 and 6. In addition, it may further include a pitch supply support unit 500 to prevent shaking of the strip (S) together with the pitch supply unit 400.

First, the pitch supply unit 400 is installed in the right direction of the lower right mold 230 as shown in FIGS. 5, 6, 8 to 10 and 16 to 18, and the strip (S) through the punch 310 ) Is formed by punching, and moving continuously and stepwise from left to right by 1 pitch interval between the concave portion S1 and the concave portion S1. That is, the pitch supply unit 400 may include a pitch supply frame 410, a pitch subframe 420, a first swing member 430, and a pitch movement pusher 450.

The pitch supply frame 410 is installed to be slidable left and right on the right side of the lower right mold, and is elastically supported to face the right side. In addition, the pitch sub-frame 420 is installed on the pitch supply frame 410, and is elastically supported so as to face upward based on the pitch supply frame 410. At this time, the first oscillating member 430 has one end rotatably installed on the upper portion of the pitch subframe 420, and one pitch interval between the recesses S1 and the recesses S1 of the strip S at the other end A pair of first locking hooks 431 formed so as to be engaged is elastically supported upward. In addition, the pitch moving pusher 450 is installed to protrude downward from the upper mold 300, and when the upper mold 300 is lowered, the pitch supply frame 410 is slid to the left, and the upper mold ( When 300) is raised, the pitch supply frame 410 is slid to the right.

Here, as shown in Figs. 16 to 18, the first rocking member 430 has the right side of each of the first locking hooks 431 in contact with the left side of the concave portion S1 of the strip S, so that the pitch When the supply frame 410 moves in the right direction, the concave portion S1 of the strip S is moved in the right direction, and the left side of each of the first locking hooks 431 is formed to be inclined as shown in FIGS. 8 to 10 Thus, when the pitch supply frame 410 moves to the left, the other end rotates downward and crosses the concave portion S1 of the strip S.

In addition, the pitch supply support 500 is the strip (S) when moving to the left side of the pitch supply frame 410 by the operation of the pitch supply unit 400 as shown in Figs. 5, 6, 8 to 10 and 16 to 18. ) To the left. That is, the pitch supply support part 500 includes a pitch support frame 510 and a second swing member 520.

The pitch support frame 510 is installed on the left side of the pitch supply frame 410 and is elastically supported to face upward. In addition, the second oscillating member 520 has one end rotatably installed on the upper portion of the pitch support frame 510, and a 1-pitch interval between the recessed portion S1 and the recessed portion S1 of the strip S at the other end A pair of second locking hooks 521 formed so as to be engaged by the amount are elastically supported to face upward.

Here, as shown in FIGS. 8 to 10, the second rocking member 520 has the right side of each of the second locking hooks 521 in contact with the left side of the concave portion of the strip S, so that the pitch supply frame ( When the 410 is moved in the left direction, the concave portion S1 of the strip S is limited so that it does not move in the left direction, and the left side of each of the second locking hooks 521 is formed to be inclined as shown in FIGS. 16 to 18 Thus, when the concave portion S1 of the strip S moves in the right direction, the other end rotates downward to guide the concave portion of the strip S to move in the right direction.

One recess (S1) is formed in the strip (S) according to the descending of the upper mold 300 through the pitch supply part 400 and the pitch supply support part 500 as described above, and according to the rise of the upper mold 300 The strip (S) moves from left to right at a constant interval of 1 pitch.

Hereinafter, an operation process of the apparatus for manufacturing an inner pin for an oil cooler according to the present invention will be described with reference to FIGS. 5 to 18, but a coupling relationship or a redundant description between specific components will be omitted.

As shown in FIG. 5, the upper mold 300 is raised with respect to the lower mold 200. The strip (S) is in a state that has been moved from left to right by one pitch interval, and the previously formed concave portion (S1) is inserted into the position fixing groove 231 of the lower right mold 230 to be fixed in position. Due to the spring force of the descending step guide spring 250, the lower right mold 230 and the descending step guide pin 240 are positioned higher than the upper surface of the lower left mold 220. At the same time, as shown in Fig. 6, the first swing member 430 of the pitch supply unit 400 and the second swing member 520 of the pitch supply support unit 500 are caught by the preformed concave portion S1, and the strip (S) It restricts the left and right movement.

As shown in FIG. 7, the upper mold 300 is lowered so that the punch 310 is in a state immediately before punching the upper surface of the strip S. At this time, as shown in Figs. 8 to 10, the pitch moving pusher 450 descends to slide the pitch supply frame 410 to the left. Specifically, the lower end of the pitch moving pusher 450 pushes the inclined right side of the pitch supply frame 410 to move the pitch supply frame 410 to the left, and the other end of the first swing member 430 rotates downward. While doing, the left side of each of the first locking hooks 431 goes over the concave portion S1 of the strip S. In this case, when the left side of each of the first locking hooks 431 rides over the concave portion S1, the strip (S) may be pushed out in the left direction, so that the pitch supply support part 500 is located on the left side of the strip (S). Limit movement. That is, when the right side of each of the second oscillating member 520 is in contact with the left side of the concave portion S1 of the strip S and moves to the left of the pitch supply frame 410, the concave portion S1 of the strip S Is to limit the movement to the left.

As shown in FIG. 11, the upper mold 300 is in a state in which the first lowering is completed, and the lower surface of the upper mold 300 is in contact with the upper surface of the lowering step guide pin 240. At this time, as shown in FIG. 12, the right side of the punch 310 is fitted to the right side of the cross-section of the punching groove 210, which is the upper left end of the lower right mold 230, and is primarily a concave part of the strip (S) ( In S1), the right side in cross section is formed. Here, as shown in FIG. 12, when the right side of the recessed part S1 is formed by the punch 310 because the preformed recessed part S1 is inserted into the position fixing groove 231 and the position is fixed. Only the left side (A) of the strip (S) is introduced during punching.

13, the upper mold 300 is in a state in which the second lowering is completed with a force greater than the spring force of the lowering step guide spring 250, and the right lower mold 230 and the lowering step guide pin ( 240) Each upper surface is located on the same plane as the upper surface of the left lower mold 220. At this time, as shown in FIG. 14, the punch 310 is inserted into the punching groove 210 to form a left side in cross section among the concave portions S1 of the strip S. That is, together with the right side of the concave portion S1 formed when the upper mold 300 is first lowered, a concave portion S1 that is finally depressed in the shape of the punching groove 210 when the upper mold 300 is secondly lowered is formed. . Here, even when the left side of the concave portion S1 is formed by the punch 310, only the left portion A of the strip S is introduced during punching, as shown in FIG. 14.

As shown in FIG. 15, the formation of the concave portion S1 of the strip S is completed and the upper mold 300 is in an elevated state, and at the same time as the upper mold 300 is raised, the strip S is 1 from left to right. It moves by the pitch interval, and the formed concave portion S1 is inserted into the position fixing groove 231 and fixed in position. That is, as shown in Figs. 16 to 18, the pitch moving pusher 450 rises to slide the pitch supply frame 410 in the right direction. Specifically, while the lower end of the pitch moving pusher 450 is separated from the inclined right side of the pitch supply frame 410, the pitch supply frame 410 is moved to the right, and the first locking hook of the first swing member 430 As the concave portion S1 caught in the 431 is moved in the right direction by 1 pitch interval, the strip S is also automatically moved by 1 pitch interval from the left to the right. At this time, the second rocking member 520 must move the concave portion (S1) of the strip (S) caught in the second locking hook 521 in a state in which there is no left-right movement, so that the concave portion of the strip (S) ( When S1) moves in the right direction, the other end of the second swing member 520 rotates downward and guides the concave portion of the strip S to move in the right direction.

As described above, the apparatus for manufacturing an inner pin for an oil cooler according to the present invention includes an inner pin having a continuous cross-section through a progressive mold 100 composed of a lower mold 200 and an upper mold 300. IF) during the manufacture of the pitch supply unit 400 and the pitch supply support unit 500 so that the distance for each processing pitch between the irregularities can be kept constant, and the lower left mold 220 fixedly installed based on the right side of the punching groove 210 ) And the lower right mold 230, which is elastically supported up and down, and through the descending step guide pin 240, the inflow amount of the strip (S) can be set constant when the recess (S1) of the inner pin (IF) is punched. There is an effect that can improve uniformity.

Embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those of ordinary skill in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Therefore, such improvements and changes will fall within the scope of the present invention as long as it is apparent to those of ordinary skill in the art.

S: strip
S1: Convex S2: Convex
IF: inner pin
100: progressive mold
200: lower mold
210: punching groove 220: lower left mold
230: lower right mold 231: position fixing groove
240: descending step guide pin 250: descending step guide spring
300: upper mold 310: punch
400: pitch supply unit
410: pitch supply frame 420: pitch subframe
430: first swing member 431: first locking hook
450: pitch moving pusher
500: pitch supply support 510: pitch support frame
520: second rocking member 521: second locking hook

Claims (9)

In an apparatus for manufacturing an inner pin for an oil cooler that manufactures an inner pin whose cross section is formed in a continuous uneven shape by processing a strip continuously and stepwise supplied from left to right through a progressive mold,
The progressive mold,
A lower mold supporting the lower surface of the strip and having a punching groove formed on the upper surface thereof,
It includes an upper mold that is installed to be elevating above the lower mold and has a punch protruding downward to face the punching groove, punching the upper surface of the strip and fitting it into the punching groove to form a recess,
The lower mold,
A left lower mold fixedly installed on the left side based on the right side of the cross section of the punching groove,
It is elastically supported so that the left side is in contact with the right side of the lower left mold so that it can move up and down on the right side based on the right side of the cross section of the punching groove, and the deformed concave portion is inserted into the right side of the punching groove at intervals of 1 pitch to fix the position. A lower right mold with a recessed position fixing groove formed therein,
It is installed in front of the lower left mold and is elastically supported to move up and down together with the lower right mold, and when the upper surface of the strip is punched through the punch by the lowering of the upper mold, the strip is interlocked with the lower right mold. An apparatus for manufacturing an inner pin for an oil cooler, comprising a lowering step guide pin for guiding the lowering of the upper mold in two stages so that the concave portion of the upper mold is first formed on the right side and then the left side is secondly formed.
The method of claim 1,
The lower mold,
Further comprising a descending step guide spring for elastically supporting the lower right mold and the descending step guide pin toward the upper side,
When the upper mold is raised, the upper surface of each of the lower right mold and the lowering step guide pin is positioned higher than the upper surface of the lower left mold.
The method of claim 2,
When the upper mold first descends, the lower surface of the upper mold contacts the upper surface of the lowering step guide pin, and the right side of the punch is joined to the right side of the cross section of the punching groove, which is the upper left end of the lower right mold, and the strip is The upper surface of each of the lower right mold and the lowering step guide pin is the same as the upper surface of the lower left mold when the upper mold second descends with a force greater than the spring force of the lowering step guide spring. An apparatus for manufacturing an inner pin for an oil cooler, characterized in that while positioned on a plane, the punch is inserted into the punching groove to form a left side in cross section of the concave portions of the strip.
The method of claim 1,
The progressive mold,
It characterized in that it further comprises a pitch supply unit installed in the right direction of the lower right mold and continuously and stepwise moved from left to right by 1 pitch interval between the concave portion and the concave portion formed by punching the strip through the punch. An apparatus for manufacturing inner pins for oil coolers.
The method of claim 4,
The pitch supply unit,
A pitch supply frame installed to be slidable left and right in the right direction of the lower right mold and elastically supported in a right direction,
A pitch sub-frame installed on the pitch supply frame and elastically supported upwardly with respect to the pitch supply frame,
A first swing that is elastically supported so that one end is rotatably installed on the upper part of the pitch subframe, and the pair of first locking hooks formed so as to be locked at the other end by 1 pitch interval between the concave portion and the concave portion of the strip face upward Absence and,
It is installed to protrude downward of the upper mold, and includes a pitch moving pusher for sliding the pitch supply frame to the left when the upper mold is lowered, and sliding the pitch supply frame to the right when the upper mold is raised. An apparatus for manufacturing an inner pin for an oil cooler, characterized in that.
The method of claim 5,
The first swing member,
The right side of each of the first locking hooks is in contact with the left side of the concave portion of the strip to move the concave portion of the strip to the right when the pitch supply frame moves in the right direction, and the left side of each of the first locking hooks is formed to be inclined. The apparatus for manufacturing an inner pin for an oil cooler, characterized in that when the pitch supply frame is moved to the left, the other end rotates downward and crosses the concave portion of the strip.
The method of claim 5,
The progressive mold,
When the pitch supply frame moves to the left by the operation of the pitch supply unit, the apparatus for manufacturing an inner pin for an oil cooler further comprises a pitch supply support part for limiting a left movement of the strip.
The method of claim 7,
The pitch supply support part,
A pitch support frame installed on the left side of the pitch supply frame and elastically supported upward,
The second swing is elastically supported so that one end is rotatably installed on the upper portion of the pitch support frame, and the second locking hook is elastically supported upwards by a pair of second locking hooks formed at the other end so as to be locked by 1 pitch between the concave and concave portions of the strip An apparatus for manufacturing an inner pin for an oil cooler, comprising a member.
The method of claim 8,
The second oscillating member,
The right side of each of the second locking hooks is contacted with the left side of the concave portion of the strip to restrict the concave portion of the strip from moving in the left direction when the pitch supply frame moves in the left direction, and the left side of each of the second locking hooks The apparatus for manufacturing an inner pin for an oil cooler, characterized in that it is formed to be inclined and guides the concave portion of the strip to move in the right direction while the other end rotates downward when the concave portion of the strip moves to the right.

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