KR20110078988A - Piercing device - Google Patents

Abstract

PURPOSE: A piercing device is provided to simultaneously form a plurality of holes on the hub of a planet carrier by making the vertical force of a press act laterally. CONSTITUTION: A piercing device comprises an upper assembly and a lower assembly. A fixing unit selectively compressing the upper part of work is installed on the upper assembly. The lower assembly comprises a piercing unit(210), a compressing unit(220) and a discharge path. The piercing unit makes a plurality of side holes pass through the side of the work. The compressing unit selectively compresses the inner side of the work. The discharge path guides the discharge of chip generated by the piercing unit.

Description

Piercing device

The present invention relates to a piercing device, and more particularly, to simultaneously form a plurality of side holes formed in the hub portion of the planet carrier used for the automatic transmission of the vehicle, to easily fix and take out the workpiece, as well as to easily discharge the chip. And a piercing device configured to.

In general, the planet carrier (Planet Carrier) refers to the parts used in the automatic transmission of the vehicle.

Such a planet carrier is divided into a hub portion having a large gear shape and a shaft portion having a small gear shape.

In addition, since the hub portion and the shaft portion have a large cross-sectional difference, the hub portion is manufactured by a drawing method, and the shaft portion is separately manufactured by cold forging, and then the hub portion and the shaft portion are welded to each other and the planet carrier ( Planet Carrier) is being used.

Further, in order to pierce a plurality of holes formed in the hub portion, holes are drilled one by one with a piercing device.

Therefore, in such a conventional technology, there is a problem that the work is difficult and the work time is excessively required. That is, when 24 holes are formed in the hub part, there is a problem that 24 piercing operations are required.

An object of the present invention is to solve the above problems, and to provide a planet carrier piercing device for forming a plurality of piercings formed on the side of the hub at the same time.

Another object of the present invention is to provide a piercing device in which the pressing of the work is selectively performed to fix the work as well as to easily take out the work.

It is still another object of the present invention to provide a piercing apparatus capable of continuous operation by facilitating the discharge of chips generated by piercing operations.

A piercing apparatus according to the present invention for achieving the above object, the upper assembly is provided with a fixing means for selectively pressing the upper portion of the workpiece; Piercing means for penetrating a plurality of side holes in the side of the workpiece, the pressing means for selectively pressing the inner side of the workpiece, and the discharge passage for guiding the discharge of the chip (chip) generated by the piercing means is provided And a lower assembly.

According to the planet carrier piercing device for an automatic transmission for a vehicle according to the present invention, there is an advantage that the work efficiency is improved. That is, in the present invention, the force of the press acting up and down acts laterally, so that a plurality of holes are simultaneously formed in the hub portion of the planet carrier.

Therefore, the present invention has the advantage that the work efficiency is improved 20 to 30 times compared to molding holes one by one as in the prior art. That is, compared with the conventional technology of forming 24 holes one by one, there is an advantage of improving the work efficiency of several tens of times.

In addition, in the conventional method of forming a plurality of holes, respectively, it is difficult to accurately select a working position, and a problem may occur in which a plurality of holes are not pierced in place. Since multiple holes are processed at the same time, the position and processing state become the same, and thus the product quality is improved.

In addition, in the present invention, the pressing means is operated to close the inner side of the workpiece to the upper assembly is lowered. Then, when the piercing operation is completed, the pressing means is automatically separated from the workpiece. Therefore, the fixing of the workpiece is firmly made, so that the piercing work is more precisely performed, as well as taking out the workpiece is advantageous.

In the present invention, passages to the side and the bottom are formed in the lower assembly to guide the discharge of the chip. Therefore, there is an advantage that the failure of the equipment due to the accumulation of chips can be prevented and the continuous work can be performed.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of the piercing apparatus by this invention is demonstrated with reference to drawings.

The piercing apparatus according to the present invention can be used in various kinds or types of products requiring piercing, but for the convenience of description, the case of forming a piercing on the planet carrier product of the automatic transmission for a vehicle will be described as an example.

1 shows an example of a planet carrier produced by the present invention in a perspective view.

As shown in the drawing, the planet carrier 10 includes a hub portion 20 having a large diameter, a shaft portion 30 having a small diameter, and the like.

The hub portion 20 includes a base surface forming a bottom surface and a side surface formed vertically upward from an edge of the base surface. And, the side of the hub portion 20 is formed with a plurality of side holes 22 penetrating laterally at equal intervals.

2 to 8 show one embodiment configuration of a piercing apparatus according to the present invention. That is, FIGS. 2 to 8 show the configuration of the piercing apparatus for forming a plurality of side holes 22 at equal intervals on the side of the hub portion 20 of the planet carrier.

Specifically, FIG. 2 shows a front sectional view of the piercing apparatus according to the present invention separated into an upper assembly and a lower assembly, and FIG. A cross-sectional front view shown by comparing is shown. That is, the left part of FIG. 3 is a state in which the upper assembly and the lower assembly are in contact with each other before piercing the work, and the right part is a state immediately after piercing the work.

4 and 5 are perspective views of the upper assembly and the lower assembly of the present invention, and FIG. 6 is a perspective view of the main components of the cover of the present invention in a peeled off state. have. In addition, Fig. 7 schematically shows the configuration of the main part of the center portion of the piercing apparatus according to the present invention, and Fig. 8 shows a perspective view of the piercing means and the punch guide constituting the present invention.

As shown in these figures, the piercing apparatus according to the present invention includes an upper assembly 100 provided on the upper side and a lower assembly 200 provided on the lower side. In addition, the workpiece M is inserted between the upper assembly 100 and the lower assembly 200 to perform a piercing operation.

Here, the work (M) refers to the planet carrier (Planet Carrier) in the state that the side hole 22 is not formed in the side of the hub portion 20 of the planet carrier (Planet Carrier). In the present embodiment, as shown, the workpiece M is placed on the lower assembly 200 in an inverted state.

The upper assembly 100, the upper block 102 and the upper body 104 is provided to support a plurality of parts.

The fixing means 110 is provided at the central portion of the upper block 102 and the upper body 104.

The fixing means 110 serves to selectively compress the upper portion of the workpiece (M). That is, the fixing means 110 moves downward with the upper block 102 and the upper body 104 serves to compress and fix the upper surface of the workpiece (M).

The fixing means 110 is a mandrel 112 inserted into the workpiece M, that is, the shaft portion 30 of the Planet Carrier 10, and the upper surface of the hub portion (20) 2) and a mandrel holder 114 in close contact with the mandrel spring, and a mandrel spring 116 for pushing the mandrel 112 and the mandrel holder 114 downward.

The mandrel 112 has a cylindrical shape and has a predetermined length. The outer diameter of the mandrel 112 is configured to have a size corresponding to the inner hole of the shaft portion 30 and to freely enter and exit the inner hole of the shaft portion 30.

The mandrel 112 also serves to prevent the flow of the sliding member 224 to be described below. That is, in the case where the side hole 22 is made by the piercing punch 212 to be described below, a plurality of sliding members to be described below by the force that the piercing punch 212 pushes the workpiece (M) from the side ( When 224 is forced inward, it tries to slide upward. Therefore, in this case, since the mandrel 112 is inserted into the plurality of sliding members 224 as shown in FIG. 7, the flow of the sliding member 224 is prevented, so that the side hole 22 is accurately generated.

The mandrel holder 114, as a whole, is made of a cylindrical shape that is hollow inside, and surrounds the outside of the mandrel 112 as shown. The lower end of the mandrel holder 114 is selectively pressed to fix the upper surface (in FIG. 2) of the hub portion 20.

The mandrel spring 116 is provided on the upper side of the mandrel 112 and is made of a compression spring or the like to apply a downward force to the mandrel 112 and the mandrel holder 114. Therefore, even when a lower end of the mandrel holder 114 hits the work piece M, if the pressure is greater than or equal to a predetermined pressure, the mandrel spring 116 is reduced to prevent an excessive force from being applied to the work piece M.

On the outside of the fixing means 110, a plurality of flow pins 120 are provided radially. The flow pin 120 has a thin cylindrical shape as shown, the lower end is in contact with the upper surface of the lower assembly 200 selectively. Therefore, the plurality of floating pins 120 maintains the overall balance while maintaining a predetermined distance from each other when the upper assembly 100 and the lower assembly 200 are close to each other.

The flow pin 120 is provided to be able to flow a certain portion up and down. Therefore, the pin spring 122 is further provided on the upper side of the floating pin 120. The pin spring 122 is composed of a compression spring, and pushes the flow pin 120 to the lower side. In addition, when the interval between the upper assembly 100 and the lower assembly 200 is narrowed, and the predetermined pressure is equal to or greater, the pin spring 122 is compressed.

A plurality of upper punches 130 are provided near the edge of the upper body 104. The plurality of upper punch 130, as a whole has a thin cylindrical shape, the lower end portion is made of a truncated conical shape gradually narrower toward the lower side.

The upper punch 130 has a portion (lower end) selectively inserted into the lower assembly 200 to force the lateral movement of the piercing punch 212 to be described below.

The lower assembly 200, the piercing means 210 to form a plurality of side holes 22 through the side of the workpiece (M), and the pressing means 220 for selectively pressing the inner side of the workpiece (M) And a discharge passage 230 for guiding the discharge of the chip generated by the piercing means 210.

In more detail, the lower assembly 200 has a lower body 202 at the lower end thereof to form an overall skeleton, and an anvil 204 is provided inside the lower body 202 to provide a plurality of parts. Will be supported.

The anvil 204 is formed in a cylindrical shape, and the discharge hole 232 for discharging the chip penetrates up and down in the center of the anvil 204.

The crimping means 220 is provided above the central portion of the anvil 204 as shown.

The crimping means 220, the core 222 is provided in the central portion of the lower assembly 200, and slides up and down along the outer surface of the core 222 and selectively with the inner surface of the workpiece (M) The sliding member 224 is in close contact with each other, and the return member 226 is applied to the sliding member 224 to return to its original shape by applying a force in one direction.

The core 222 is provided above the central portion of the anvil 204, and supports a support end 222a in contact with the anvil 204 and a guide part 222b extending upward from the support end 222a. And so on.

The guide part 222b is configured such that an outer surface thereof contacts the inner surface of the sliding member 224 to guide the vertical flow of the sliding member 224 and has a predetermined inclination angle α with respect to the vertical surface. That is, the guide part 222b has an inclination angle of about 5 ° to allow the sliding member 224 to flow up and down and to move a predetermined distance from side to side to closely fix the inner surface of the workpiece M. It is formed to have.

In addition, a core hole 234 is formed in the central portion of the core 222 to vertically penetrate and guide the vertical movement of the chip.

The sliding member 224 is installed to surround the outside of the guide portion 222b of the core 222, and slides along the outer surface of the guide portion 222b. Therefore, the inner surface of the sliding member 224 is formed to have an inclination angle α corresponding to the outer surface of the guide portion 222b of the core 222.

The sliding member 224 is further provided with a member hole 236 for chip discharge. That is, as shown, the upper end of the sliding member 224 is formed with a member hole 236 penetrating laterally. The member hole 236 is for discharging the chip generated by the side hole 22 formed by the piercing punch 212 to be described below.

The member hole 236, the core hole 234, and the discharge hole 232 form the discharge passage 230 for discharging the chip pierced in the workpiece (M). Therefore, a chip, which is a by-product of the work M, is sequentially moved along the member hole 236, the core hole 234, and the discharge hole 232, and discharged downward.

The outer side of the sliding member 224 is further provided with a compression ring 240. The compression ring 240 is made of an O-ring, and a plurality of compression rings 240 are provided to force the plurality of sliding member 224 to gather together inward. Accordingly, when the plurality of sliding members 224 sliding upward along the outer surface of the core 222, the plurality of sliding members 224 naturally gather to the center of each other.

A core block 242 is further provided below the plurality of sliding members 224. The core block 242 has a circular ring shape to support lower ends of the plurality of sliding members 224.

The return member 226 is provided below the core block 242. More specifically, the core block 242 is provided with a plurality of holes opened downward, and the return member 226 is inserted into the plurality of holes.

The return member 226 is made of a compression spring or the like, and applies a compressive force to the sliding member 224 in an upward direction. Accordingly, when the mandrel holder 114 moves downward by the force of pressing the work piece M, and then the mandrel holder 114 moves upward, the return member 226 The core block 242 and the sliding member 224 is moved upward by the elastic force of the original position.

The punch guide 244 is provided on the outside of the crimping means 220. The punch guide 244 surrounds the core 222 and the sliding member 224 and guides the flow of the piercing punch 212 to be described below.

Therefore, the punch guide 244 is provided with a guide hole 244a through which the piercing punch 212 to be described below. That is, a guide hole 244a penetrated laterally is formed near the upper end of the punch guide 244 to guide the flow of the tip portion of the piercing punch 212.

A body holder 250 is further provided above the anvil 204, and a plurality of piercing means 210 is provided above the body holder 250.

The piercing means 210 includes a piercing punch 212 that flows laterally to form the side hole 22, a punch holder 214 to which the piercing punch 212 is fixed, and the punch holder 214. Is composed of a punch spring 216 and the like forcing the to be in place.

The piercing punch 212 is formed to a predetermined length and flows laterally, and serves to form a plurality of side holes 22 on the side of the workpiece (M). The piercing punch 212 is fixed to the punch holder 214 to flow laterally.

In addition, the distal end portion of the piercing punch 212 is installed to be inserted into the guide hole 244a of the punch guide 244, as shown in the lower assembly 200 according to the flow of the punch holder 214. Flowing inward to form the side hole 22 on the side of the workpiece (M).

The punch holder 214, the piercing punch 212 is to flow to the left and right by the upper punch (130). Therefore, an insertion surface 214a is formed to be inclined at the outer edge of the punch holder 214 to facilitate contact of the piercing punch 212. That is, as shown, the upper end of the outer edge of the punch holder 214 forms an inclined surface that becomes narrower toward the upper side, the inclined surface is the insertion surface (214a).

The punch spring 216, as shown, is provided inside the lower end of the punch holder 214, the force is always applied to push the punch holder 214 to the outside (border direction). Accordingly, when the punch holder 214 is pushed inward by the upper punch 130 and then the upper punch 130 is out of the lower assembly 200, the punch holder 214 punches again by the compression force of the punch spring 216. The holder 214 is moved outward to its original position.

A holder clamp 218 is further provided inside the upper end of the punch holder 214.

The outer side of the punch holder 214, as shown, a punch receiving portion 260 is formed. The punch accommodating part 260 is a portion into which the upper punch 130 is inserted. That is, the punch accommodating part 260 has a quantity corresponding to the quantity of the upper punch 130, so that the upper punch 130 is selectively accommodated.

The left and right widths (inner diameter) of the punch accommodating part 260 (as in FIG. 2) are smaller than the outer diameter of the upper punch 130. Therefore, when the upper punch 130 is inserted into the punch accommodating part 260, the punch holder 214 is pushed inward, and the piercing punch 212 flows inward.

A stopper 262 is wrapped around the outer side of the punch accommodating part 260, and a ring-shaped stopper ring 264 is provided on the outside of the stopper 262 to support the stopper 262.

The cover 270 is provided on the punch holder 214. The cover 270 is formed of one or two or more components to form an upper appearance of the lower assembly 200. The cover 270 is formed with a plurality of punch holes 272 through which the upper punch 130 is selectively inserted.

The crimping means 220 and the piercing means 210 described above operate sequentially or simultaneously. That is, as the upper assembly 100 descends, the crimping means 220 and the piercing means 210 operate sequentially or simultaneously, thereby fixing and piercing the workpiece.

It looks at the operation of the piercing device according to the present invention as described above.

First, the planet carrier 10 is mounted upside down on the lower assembly 200 as shown in FIG. 2.

Then, the upper assembly 100 is lowered to approach the lower assembly 200.

In this case, it will be in the state like FIG.

At this time, as shown, the mandrel 112 is inserted into the shaft portion 30, the lower end of the mandrel holder 114 is in close contact with the upper surface (in Figure 9) of the hub portion 20. Press the planet carrier 10.

The lower end of the upper punch 130 is inserted into the punch hole 272 of the cover 270.

Subsequently, when the upper assembly 100 is further lowered, the planet carrier 10 is pressed down by the mandrel holder 114 to be lowered further down. Therefore, the sliding member 224 supporting the planet carrier 10 slides downward along the outer surface of the core 222. That is, when the pressing force of the upper assembly 100 is greater than the elastic force of the return member 226, the sliding member 224 moves downward.

When the sliding member 224 is pushed down as described above, the member hole 236 of the sliding member 224 is equal to the position of the piercing punch 212. That is, the upper and lower positions of the member hole 236 and the piercing punch 212 are placed at the same position as shown in the right figure of FIG.

3, the sliding member 224 is supported by the core 222 so that the sliding member 224 is no longer lowered, and the sliding member 224 is gradually lowered downward. Will move outwards. That is, since the guide portion 222b of the core 222 has a slope that gradually increases in width toward the lower side, the sliding member 224 sliding down along the outer surface of the core 222 naturally moves outward. Done.

Therefore, since the sliding member 224 is pressed down by the planet carrier 10 and expands downward while descending downward, the outer surface of the sliding member 224 is formed on the inner surface of the hub portion 20 of the planet carrier 10. Closely and firmly supported.

On the other hand, as the upper assembly 100 is lowered, the upper punch 130 also gradually descends, so that the lower end of the upper punch 130 is in contact with the punch holder 214 of the piercing means 210. . That is, the punch holder 214 comes into contact with the insertion surface 214a first.

Accordingly, the punch holder 214 is naturally pushed inward, and thus the piercing punch 212 is pushed inward, so that the hub portion 20 of the planet carrier 10 as shown in the right side of FIG. It will penetrate through.

In this case, the plurality of side holes 22 penetrate through the hub portion 20 of the planet carrier 10 by the plurality of piercing punches 212.

In addition, due to the formation of the side holes 22, the chips cut in the hub 20 of the planet carrier 10 are discharged downward along the discharge passage 230. That is, the chip, which is a by-product of the work M, is sequentially discharged out of the lower assembly 200 by moving the member hole 236, the core hole 234, and the discharge hole 232.

After the side hole 22 is formed by the above process, the upper assembly 100 moves upward and is returned to its original position.

As such, as the upper assembly 100 moves upward, the upper punch 130 also rises upward. Therefore, as shown in the right side of FIG. 3, when the upper punch 130 inserted into the punch accommodating part 260 is pulled out, the punch holder 214 is pushed out by the force of the punch spring 216. It is in place.

On the other hand, when the upper assembly 100 rises upward, the mandrel holder 114 holding the planet carrier 10 also rises upward, so that the sliding member 224 is driven by the force of the return member 226. Moves upwards.

The plurality of sliding members 224 are moved upward by the force of the return member 226 and are gathered at the center (inside) with each other by the force of the compression ring 240. Accordingly, a plurality of sliding members 224, which have been in close contact with the inner surface of the hub portion 20 of the planet carrier 10, are collected inward and separated from the inner surface of the hub portion 20 of the planet carrier 10. .

When the upper assembly 100 moves upward as described above, all of them are returned to their original positions as shown in FIG. 2, so that the work piece M, that is, the planet carrier 10, is placed on the upper side of the sliding member 224. When lifted upward, it is easily separated from the lower assembly 200.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

For example, in the above embodiment, for convenience of description, the compression spring is illustrated as a member for repositioning a predetermined part, such as the punch spring 216, but despite the name of the term, the original position of the corresponding part Of course, a variety of other members or means can be used in addition to the compression spring as long as it has the function of applying a force for.

1 is a perspective view showing an example of a planet carrier (Planet Carrier) produced by the present invention.

Figure 2 is a front sectional view showing the configuration of a preferred embodiment of a piercing device according to the present invention.

Figure 3 is a front cross-sectional view comparing the state before and after forming a piercing on the workpiece in accordance with an embodiment of the present invention.

Figure 4 is a perspective view showing the configuration of the upper assembly constituting an embodiment of the present invention.

5 is a perspective view showing the configuration of a lower assembly constituting an embodiment of the present invention.

6 is a perspective view of the cover of the lower assembly constituting the embodiment of the present invention removed.

Figure 7 is a partial perspective view showing the main portion of the central portion of the piercing device according to the present invention.

8 is a perspective view showing the configuration of a piercing means and a punch guide constituting an embodiment of the present invention.

Figure 9 is a front sectional view showing a contact state of the upper assembly and the lower assembly constituting an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100. Upper assembly 110. Fastening means

120. Flow Pin 130. Upper Punch

200. Lower assembly 210. Piercing means

220. Crimping means 230. Discharge passage

240. Compression ring 250. Body holder

260. Punch Receptacle 270. Cover

Claims (5)

An upper assembly 100 having a fixing means 110 for selectively crimping an upper portion of the workpiece M; Piercing means 210 for penetrating a plurality of side holes 22 in the side of the workpiece (M), pressing means 220 for selectively compressing the inner side of the workpiece (M), and the piercing means (210) The lower assembly (200) having a discharge passage for guiding the discharge of the chip (chip) generated by the; piercing device having a configuration comprising a. The method of claim 1, wherein the piercing means 210, A piercing punch 212 which flows laterally to form the side hole 22 and a punch holder 214 to which the piercing punch 212 is fixed; In the upper assembly 100, And a portion of which is selectively inserted into the lower assembly (200), the upper punch (130) for forcing the lateral movement of the piercing punch (212); The method of claim 1 or 2, wherein the pressing means 220, The core 222 provided at the center of the lower assembly 200 and the sliding member 224 sliding sliding up and down along the outer surface of the core 222 to be in close contact with the inner surface of the workpiece (M). And a return member (226) for applying the force in one direction to the sliding member (224) to return to the original position. The method of claim 3, wherein the discharge passage, A member hole 236 formed at one side of the sliding member 224 to guide the lateral movement of the chip, and formed up and down at a central portion of the core 222 to guide the vertical movement of the chip; And a discharge hole (232) provided below the core hole (234) to guide the discharge of the chip. According to claim 3, wherein the crimping means 220 and the piercing means 210, Piercing device, characterized in that to operate in sequence or at the same time, according to the lowering of the upper assembly (100) to fix and pierce the workpiece.

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