TW201720639A - Tube hydroforming apparatus and sealing punch thereof - Google Patents

Abstract

A tube hydroforming apparatus used for fabricating a tube by hydroforming includes a first mold, a pushing member, a second mold and a sealing punch. The pushing member drives a pushed member of the sealing punch to make the pushed member pushing a sealing ring installed within the tube during hydroforming process. The sealing ring is pushed to be deformed by the pushed member, and the deformed sealing ring is able to seal the tube to prevent liquid in the tube from outflowing.

Description

Pipe fitting hydroforming mechanism and sealing punch thereof

The present invention relates to a pipe fitting hydroforming mechanism and a sealing punch thereof, in particular, in a process of hydroforming a pipe member, a sealing member is pushed by a pressing member of a sealing punch to deform and seal the sealing ring. Pipe fitting hydroforming mechanism for pipe fittings and sealing punch thereof.

The conventional pipe processing process places a pipe member in a mold of a hydroforming machine, and a hydraulic punch is disposed on each of the two openings of the pipe member, and the hydraulic punch is used to transport a liquid into the pipe member. The tube wall of the tube is deformed and filled in the cavity of the mold.

However, in the processing of different pipe fittings (such as U-tubes), since the distance between the two openings of the pipe fittings is relatively close, it is not advantageous to provide the hydraulic punch.

In addition, if there is only one hydraulic punch, one of the openings of the pipe member needs to be sealed to perform the hydroforming process. However, since the hydraulic pressure in the pipe member is large, when the pipe member is improperly sealed, it is easy to cause liquid to flow out of the pipe member. Perform a hydroforming process.

The main object of the present invention is to provide a pipe fitting hydroforming mechanism for hydroforming a pipe member, the pipe fitting hydroforming mechanism comprising a first die, a pushing block, a second die and a sealing punch, the first The mold has a first forming surface, the second mold has a second forming surface, the first forming surface and the second forming surface are for restraining the tube, the sealing punch comprising a shaft, a sealing ring, and a And a stopper member, the shaft rod sequentially penetrates the sealing ring and the pushing member, and a first end portion of the shaft rod is provided with a limiting portion, and the sealing ring is restricted to the limiting portion A second end of the shaft is coupled to the blocking member, and the pushing member is located between the sealing ring and the stopping member, and the pushing block is located in the first mold The limiting portion and the sealing ring are disposed in the tubular member, and the pushing block abuts the pushing member to move the pushing member toward the sealing ring, and the pushing member pushes The seal ring deforms the seal ring that is limited between the limit portion and the push member Sealing the tube.

Another object of the present invention is to provide a sealing punch for a tubular hydraulic forming mechanism for sealing a tubular member, the sealing punch comprising a shaft, a sealing ring, a biasing member and a stopping member, the shaft a first end of the shaft has a limiting portion, and the sealing ring is limited between the limiting portion and the driven member, the shaft is a second end portion is coupled to the blocking member, the pushing member is located between the sealing ring and the stopping member, the limiting portion and the sealing ring are disposed in the tubular member, when the pushing member faces the When the seal ring moves, the pusher pushes the seal ring such that the seal ring that is confined between the limit portion and the push member deforms to seal the pipe member.

In the process of hydroforming, the pushing block abuts the pushing member, and the pushing member moves toward the sealing ring and pushes the sealing ring so as to be limited to the limiting portion and the pushed member. The seal ring is deformed and seals the tube to prevent liquid from flowing out of the tube during the hydroforming process.

Referring to FIG. 1 , a pipe fitting hydroforming mechanism 100 for hydraulically forming a pipe fitting 200 includes a first die 110 , a pushing block 120 , a second die 130 , and a sealing punch 140 having a first forming surface 111, the second mold 130 having a second forming surface 131, in the embodiment, the first forming surface 111 and the second forming surface One or both of the 131s are provided with a forming groove (not shown). The tube member 200 is disposed between the first mold 110 and the second mold 130. The first forming surface of the first mold 110 The second forming surface 111 is used to restrain the tubular member 200.

Referring to FIG. 1 , in the embodiment, the tubular member 200 has a first opening 210 and a second opening 220 for sealing the first opening 210 of the tubular member 200 to avoid hydraulic pressure. The liquid in the forming process flows out of the first opening 210 of the tube member 200.

Referring to FIG. 1 , in the embodiment, the second opening 220 of the tubular member 200 is provided with a punch mechanism 300 for transporting liquid into the tubular member 200 so that the tubular member 200 is liquid. The pressure is expanded and deformed, and since the tube member 200 is confined between the first forming surface 111 and the second forming surface 131, the tube wall of the tube member 200 may be deformed and filled in the first forming surface. In the forming groove of the 111 and the second forming surface 131, the punch mechanism 300 may be selected from the "finely adjustable tube forming punch mechanism" of Taiwan Patent Application No. 94110486 or other conventional liquid supply punches. The mechanism, the invention is not limited to the aspect of the punch mechanism 300.

Referring to Figures 1, 2 and 3, the sealing punch 140 includes a shaft 141, a sealing ring 142, a biased member 143 and a stopper 144. The sealing ring 142 may be selected from materials such as rubber. The sealing ring 142 is deformed by being pressed, and the shaft 141 sequentially penetrates the sealing ring 142 and the urging member 143. A first end portion 141a of the shaft 141 is provided with a limiting portion 141b. The sealing portion is provided with a limiting portion 141b. The ring 142 is constrained between the limiting portion 141b and the biasing member 143. A second end portion 141c of the shaft 141 is coupled to the blocking member 144. In the embodiment, the shaft 141 is The second end portion 141c is screwed to the stopping member 144. The pushing member 143 is located between the sealing ring 142 and the stopping member 144, and the pushing member 143 is selectively at the sealing ring 142. Moving between the stopper 144.

Referring to Figures 2 and 3, when the inner diameters of the different tubular members 200 are different or the sealing ring 142 is damaged, the shaft 141 and the stopper 144 can be separated to replace the sealing ring 142, so that the sealing ring 142 is replaced. The tubular member 200 of different inner diameters is matched, and since the second end portion 141c of the shaft 141 is screwed to the stopper 144, the second end portion 141c can be coupled to the stopper 144 by adjusting the second end portion 141c. The depth of the push member 143 is changed between the seal ring 142 and the stopper 144 to tightly seal the first opening 210 of the tubular member 200 when the seal ring 142 is pressed and deformed.

Referring to Figures 2 and 3, the push member 143 has a first guide surface 143a facing the stop member 144. Preferably, the push member 143 has a rod portion 143b and a first pushed portion 143c is coupled to the rod portion 143b. In the embodiment, the first guiding surface 143a is disposed on the first pushed portion 143c. Preferably, the first portion A pushed portion 143c is integrally formed with the rod portion 143b.

Referring to FIGS. 1 and 3, a tube forming process is performed. The tube member 200 is placed on the second forming surface 131 of the second mold 130. The limiting portion 141b, the sealing ring 142 and the rod portion are disposed. 143b is disposed in the first opening 210 of the tube member 200. The first pushed portion 143c is located outside the first mold 110, and the stopping member 144 is disposed outside the pushing block 120. In this embodiment, the 143b is disposed outside the first pushing block 120. The stopper 144 contacts the pushing block 120 , and the pushing block 120 is located between the first die 110 and the stopper 144 .

Referring to FIGS. 3 and 4, when the first mold 110 is moved toward the second mold 130, the pushing block 120 abuts the pushed member 143, and the pushed member 143 is moved toward the sealing ring 142 and pushed. The sealing ring 143, in the embodiment, the pushing block 120 is in contact with the first guiding surface 143a of the pushing member 143, and the pushing member 143 pushes the sealing ring 142 with the rod portion 143b, The sealing ring 142 is restrained between the limiting portion 141b and the biasing member 143, so that the sealing ring 142 deforms and seals the first opening 210 of the tubular member 200.

Preferably, in the embodiment, the pushing block 120 has a pushing inclined surface 121 facing the pushing member 143. When the first mold 110 moves toward the second mold 130, the The pushing inclined surface 121 is in contact with the pushing member 143. In the embodiment, the pushing inclined surface 121 is in contact with the first guiding inclined surface 143a of the pushed piece 143, so that the pushed piece 143 moves toward the sealing ring 142 and pushes The sealing ring 143 is squeezed. Preferably, the slope of the first guiding slope 143a and the pushing slope 121 are substantially the same.

Alternatively, in different embodiments, only one of the pushing slope 121 of the pushing block 120 or the first guiding surface 143a of the pushing member 143 needs to be disposed, and when the pushing block 120 contacts the receiving Similarly, when the pusher 143 is pushed, the pusher 143 can be moved toward the seal ring 142 and the seal ring 143 can be pushed.

Referring to FIGS. 1 and 3, the first accommodating space S1 is disposed between the ejector block 120 and the first die 110, and the first accommodating space S1 is configured to receive the first urging portion 143c. When the first mold 110 moves toward the second mold 130, the first pushed portion 143c can be accommodated in the first receiving space S1.

Referring to FIGS. 3 and 4, the pushing block 120 is coupled to the first mold 110. Preferably, the pushing block 120 moves synchronously with the first mold 110 when the first mold 110 faces the second mold. When the 130 is moved, the first die 110 drives the pushing block 120 to move toward the pushed member 143 to make the pushing block 120 interfere with the pushed member 143.

Referring to Figures 1, 3 and 4, the tube hydroforming mechanism 100 further includes a support block 150 positioned between the second mold 130 and the stopper 144, the push member 143 having another a second pushed portion 143d is coupled to the rod portion 143b. Preferably, the first pushed portion 143c and the second pushed portion 143d are symmetrically coupled to the rod body, respectively. a portion 143b, wherein the first pushed portion 143c, the rod portion 143b, and the second pushed portion 143d are integrally formed. When the pushing block 120 is in contact with the pushed member 143, the second pushed portion 143d In response to the support block 150, the pusher member 143 is moved toward the seal ring 142 and the seal ring 143 is pushed.

Referring to Figures 2, 3 and 4, in the present embodiment, the pusher member 143 has a second lead inclined surface 143e, the second lead inclined surface 143e is disposed on the second pushed portion 143d, and the second guide The inclined surface 143e faces the stopping member 144, and the second pushing portion 143d is in contact with the supporting block 150 by the second guiding inclined surface 143e. Preferably, the supporting block 150 has a supporting inclined surface 151 facing the receiving portion 151. The pushing member 143, the second pushing portion 143d is in contact with the supporting inclined surface 151 by the second guiding inclined surface 143e, and the slope of the second guiding inclined surface 143e and the supporting inclined surface 151 is substantially the same. .

Referring to FIGS. 1 and 3, a second accommodating space S2 is formed between the support block 150 and the second die 130. The second accommodating space S2 is for receiving the second urging portion 143d. When a mold 110 moves toward the second mold 130, the second pushed portion 143d can be accommodated in the second receiving space S2.

In the present invention, the sealing ring 143 is pushed in the tubular member 200 by the pushing member 143 of the sealing punch 140, so that the sealing ring 143 is pressed by the limiting portion 141b and the biasing member 143 to deform. The first opening 210 of the tubular member 200 is tightly sealed to prevent the liquid from flowing out of the tubular member during the hydroforming process, and further the squeezed member 143 is pressed by the pushing member 120 to press the sealing ring. 143. Therefore, by adjusting the moving position of the pushing block 120, the pushing member 143 can be controlled to press the sealing ring 143 to achieve the purpose of sealing the tubular member 200 by the sealing ring 143, and the sealing ring 143 can be avoided. The stopper portion 141b and the pusher 143 are excessively pressed and damaged.

The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .

100‧‧‧ Pipe fitting hydroforming mechanism
110‧‧‧First mould
111‧‧‧First forming surface
120‧‧‧Top push block
121‧‧‧Pushing bevel
130‧‧‧Second mold
131‧‧‧Second forming surface
140‧‧‧ Sealing punch
141‧‧‧ shaft
141a‧‧‧First end
141b‧‧‧Limited
141c‧‧‧second end
142‧‧‧Seal ring
143‧‧‧Pushing parts
143a‧‧‧First guiding slope
143b‧‧‧ Body
143c‧‧‧The first part of the Ministry
143d‧‧‧second push
143e‧‧‧Second inclined slope
144‧‧‧stops
150‧‧‧Support block
151‧‧‧Support bevel
200‧‧‧ pipe fittings
210‧‧‧ first opening
220‧‧‧second opening
300‧‧‧punch mechanism
S1‧‧‧First accommodation space
S2‧‧‧Second accommodating space

Fig. 1 is a schematic view showing the "hydraulic forming mechanism for pipe fittings" of the present invention. Fig. 2 is an exploded perspective view showing the "sealing punch" of the present invention. Fig. 3 is a partial cross-sectional view showing the "hydraulic forming mechanism of the pipe fitting" of the present invention before the operation. Fig. 4 is a partial cross-sectional view showing the operation of the "hydraulic forming mechanism for pipe fittings" of the present invention.

100‧‧‧ Pipe fitting hydroforming mechanism

110‧‧‧First mould

120‧‧‧Top push block

121‧‧‧Pushing bevel

130‧‧‧Second mold

140‧‧‧ Sealing punch

141‧‧‧ shaft

141a‧‧‧First end

141b‧‧‧Limited

141c‧‧‧second end

142‧‧‧Seal ring

143‧‧‧Pushing parts

143a‧‧‧First guiding slope

143b‧‧‧ Body

143c‧‧‧The first part of the Ministry

143d‧‧‧second push

143e‧‧‧Second inclined slope

144‧‧‧stops

150‧‧‧Support block

151‧‧‧Support bevel

200‧‧‧ pipe fittings

210‧‧‧ first opening

S1‧‧‧First accommodation space

S2‧‧‧Second accommodating space

Claims (17)

A pipe fitting hydroforming mechanism for hydroforming a pipe member, the pipe fitting hydroforming mechanism comprising: a first die having a first forming surface; a pushing block; a second die having a second forming surface, The first forming surface and the second forming surface are for restraining the pipe member; and a sealing punch comprising a shaft rod, a sealing ring, a biasing member and a stopping member, the shaft rod sequentially penetrates the sealing member a ring and a biasing member, a first end of the shaft is provided with a limiting portion, the sealing ring is limited between the limiting portion and the driven member, and a second end of the shaft is coupled In the blocking member, the pushing member is located between the sealing ring and the stopping member, and the pushing block is located between the first mold and the stopping member, the limiting portion and the sealing ring Provided in the tube member, the pushing block abuts the pushing member, moving the pushing member toward the sealing ring and pushing the sealing ring so as to be limited between the limiting portion and the pushed member A sealing ring seals the tube. The pipe fitting hydroforming mechanism according to claim 1, wherein the pushing member has a first guiding slope, the first guiding surface faces the stopping member, and the pushing block abuts the first guiding inclined surface, The pusher is pushed against the seal ring. The pipe fitting hydroforming mechanism according to claim 1, wherein the pushing block has a pushing inclined surface facing the pushing member, and the pushing member abuts the pushing inclined surface. The pipe fitting hydroforming mechanism according to claim 1, wherein the pushing member has a first guiding inclined surface, the pushing block has a pushing inclined surface, the first guiding inclined surface abutting the pushing inclined surface, and the The slope of the first guiding slope is substantially the same as the slope of the pushing slope. The pipe fitting hydroforming mechanism according to claim 2, wherein the pushing member has a rod body portion and a first pushing portion, the first pushing portion is coupled to the rod body portion, the rod body portion The first urging portion is located outside the first mold, the urging member is in contact with the sealing ring by the shank portion, and the first guiding surface is disposed on the first urging portion. The pipe fitting hydroforming mechanism of claim 5, wherein the first pushing space and the first die have a first receiving space for receiving the first receiving portion. . The pipe fitting hydroforming mechanism according to claim 1, wherein the pushing block is coupled to the first die, and the first die drives the pushing block to move toward the pushing member to make the pushing block Resist the victim. The pipe fitting hydroforming mechanism of claim 1, wherein the stopper contacts the pushing block. The pipe fitting hydroforming mechanism of claim 5, further comprising a support block located between the second die and the stopper, the pusher further having a second receiving a pushing portion that opposes the support block to move the pusher toward the seal ring and push the seal ring. The tubular hydroforming mechanism of claim 9, wherein the biasing member has a second guiding inclined surface, the second guiding inclined surface is disposed on the second pushed portion, and the second guiding inclined surface faces the blocking a stopper, the second pushed portion is in contact with the support block by the second lead inclined surface. The pipe fitting hydroforming mechanism according to claim 9, wherein the supporting block has a supporting inclined surface facing the pushing member, the second guiding inclined surface abutting the supporting inclined surface, and the second guiding inclined surface is opposite The slope of the support ramp is substantially the same. The pipe fitting hydroforming mechanism of claim 9, wherein the support block and the second die have a second accommodating space for accommodating the second urging portion. A sealing punch for a hydraulic forming mechanism of a pipe fitting for sealing a pipe member, the sealing punch comprising a shaft rod, a sealing ring, a pushing member and a stopping member, the shaft rod sequentially running through the sealing ring and a first end of the shaft is provided with a limiting portion, the sealing ring is limited between the limiting portion and the pushed member, and a second end of the shaft is coupled to the a stopper, the pusher is located between the seal ring and the stopper, the limiting portion and the seal ring are disposed in the tubular member, and the pusher is pushed when the pusher member moves toward the seal ring The piece pushes the seal ring such that the seal ring that is confined between the limit portion and the push member deforms to seal the tube. The sealing punch of the pipe fitting hydroforming mechanism according to claim 13, wherein the pushing member has a first guiding inclined surface facing the stopping member, wherein the first guiding inclined surface is used for A push block opposes to cause the pusher to push the seal ring. The sealing punch of the pipe fitting hydroforming mechanism according to claim 14, wherein the pushing member has a rod body and a first pushed portion, and the first pushed portion is coupled to the rod portion. The rod body contacts the sealing ring, and the first guiding surface is disposed on the first pushed portion. The sealing punch of the pipe fitting hydroforming mechanism of claim 15, wherein the pushing member further has a second pushed portion, the second pushed portion is coupled to the rod portion, the second receiving portion The push portion is adapted to be in contact with a support block to urge the push member against the seal ring. The sealing punch of the pipe fitting hydroforming mechanism according to claim 16, wherein the pushing member has a second guiding inclined surface, the second guiding inclined surface is disposed on the second pushed portion, and the second guiding portion The inclined surface faces the stopping member, and the second pushed portion interferes with the supporting block by the second guiding inclined surface.