TWI571334B - The forming method and device of the mother joint of the universal joint - Google Patents

Description

Method and device for forming female joint of universal joint

The invention relates to a molding method and a device thereof, in particular to a molding method and a device for a female joint of a universal joint.

When the hand tool is used, it is often limited by the excessively narrow and excessively turned use space, and the hand tool cannot be inserted into the operation. Generally, the user overcomes this problem by adding a universal joint. Referring to FIG. 1 , a universal joint 1 includes a male coupling member 11 , a connecting member 12 pivotally connected to the male coupling member 11 , and a female coupling member 13 pivotally connected to the other end of the connecting member 12 . One end of the male coupling member 11 and the female coupling member 13 not connected to the connecting member 12 can be respectively coupled with a hand tool and a fitting thereof (not shown), and the rotating shafts of the male coupling member 11 and the female coupling member 13 are perpendicular to each other. The male coupling member 11 and the female coupling member 13 are pivotable relative to the connecting member 12 in mutually perpendicular directions, thereby providing the hand tool with a higher degree of freedom for the user to reach into a narrow and turning point. Use more space to operate.

The common female coupling member 13 includes a body portion 131, and a lug portion 132 disposed at the same end of the seat portion 131 at intervals, and a portion of the body portion 131 extending through the seat portion 131 and extending through the seat portion 131 Through hole 133. The seat portion 131 and the lug portions 132 cooperate to define a movable slot 134 for insertion of one end of the connector member 12. The female coupling member 13 is generally cut to the whole process. The method of cutting is made, so the material utilization rate is low and the cost is increased and the resources are wasted. In the cutting process, the strength of the finished product is also reduced due to the continuity of the blank. In addition, the cutting process is When the shape of the blank is reciprocated, when the shape to be formed is complicated, it is necessary to perform reciprocating cutting in different directions of the blank by a plurality of passes, which is time-consuming and labor-intensive.

Accordingly, it is an object of the present invention to provide a molding method which can improve material utilization, increase product strength, and reduce processing time.

Therefore, the method for molding the female joint of the universal joint of the present invention comprises a preparation step, a pre-forging step, a lug processing step, and a through hole processing step. In the stocking step, a set length of columnar blank is prepared. In the pre-forging step, the columnar blank is placed in a pre-forging die to shape the column-shaped blank into a pre-forging. In the lug processing step, the pre-forging member is placed in a lug forming mold, the pre-forging member is formed into a body portion, and the lug portions are formed at the same end of the seat portion at intervals of two phases, and the convex portions are convex. The ear and the body of the seat cooperate to form a movable slot. In the through hole processing step, the seat portion of the pre-forging member is placed in a through-hole forming mold upward, and a through hole extending longitudinally through the seat portion is formed on the seat portion in a stripping manner. .

Another object of the present invention is to provide a molding apparatus for a female joint of a universal joint which can improve the material utilization rate, enhance the strength of the finished product, and reduce the processing time.

Thus, the forming device of the female coupling member of the universal joint of the present invention is used to process a columnar blank. The molding device comprises a pre-forging die, A lug forming mold and a through hole forming mold. The pre-forging die includes a pre-forging master mold for accommodating the column-shaped billet, and a pre-forging male mold reciprocable relative to the pre-forging master mold to form a pre-forging piece. The lug forming mold comprises a lug forming master mold for accommodating the pre-forging member, and a lug forming male mold reciprocable relative to the lug forming master mold, the lug forming master mold having a cavity, The cavity has a body region, and two lug regions that are connected to the body region and are respectively located on both sides of the lug forming male mold.

The through hole forming mold includes a pass for receiving the pre-forging piece a hole forming master mold, and a through hole forming male mold reciprocable relative to the through hole forming master mold, the through hole forming mother mold having a through hole forming mother mold body surrounding a forming groove for receiving the preforging piece And a through-hole forming male mold core extending into the molding groove, the through-hole forming male mold having a through-hole forming male mold core which is formed in a hollow shape toward the through-hole forming mother mold body and surrounds a returning groove .

The effect of the invention is that the blank can be obtained according to the above steps Formed as a female joint of a universal joint, and without secondary cutting, it can improve material utilization and save processing time and pass.

2‧‧‧Pre-forging mould

21‧‧‧Pre-forging master

22‧‧‧Pre-forging male model

3‧‧‧Recessed molding die

31‧‧‧Recessed molding master

311‧‧‧Recessed molding

312‧‧‧ recessed molding master

313‧‧‧ accommodating slots

314‧‧‧First bump

32‧‧‧ concave forming male mold

321‧‧‧second bump

4‧‧‧Lug forming mould

40‧‧‧ cavity

401‧‧‧ body area

402‧‧‧Lug area

41‧‧‧Lent forming master

42‧‧‧Lug forming male mold

5‧‧‧Pre-forging die

51‧‧‧Pre-steering forging master

511‧‧‧End

512‧‧‧Pre-forged section

52‧‧‧Pre-tilting forging male model

521‧‧

522‧‧‧Extension

523‧‧ ‧ paragraph difference

6‧‧‧Pre-forging hole mould

61‧‧‧Pre-forged hole master

611‧‧‧Pushing Department

612‧‧‧Second oblique forging

62‧‧‧Pre-forging hole male model

7‧‧‧through hole forming mould

71‧‧‧through hole forming master

710‧‧‧forming trough

711‧‧‧through hole forming mother body

712‧‧‧through hole forming master mold

713‧‧‧Slope section

72‧‧‧through hole forming male mold

720‧‧‧Return slot

721‧‧‧through hole forming male mold

81‧‧‧ Preparation steps

82‧‧‧Pre-forging steps

83‧‧‧ recess processing steps

84‧‧‧Lar processing steps

85‧‧‧Pre-tilting step

86‧‧‧Pre-forging hole steps

87‧‧‧through hole processing steps

9‧‧‧Pre-forgings

91‧‧‧Depression

92‧‧‧ body

93‧‧‧Lugs

94‧‧‧ Activity slot

95‧‧‧Pre-tilt section

96‧‧‧Blind hole

97‧‧‧Second inclined section

98‧‧‧through holes

99‧‧‧Slope section

A‧‧‧Female joints

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is a side view showing a universal joint; FIG. 2 is a schematic view showing the universal joint of the present invention. FIG. 3 is a cross-sectional view showing a pre-forging die in the embodiment; FIG. 4 is a cross-sectional view showing a recess forming die in the embodiment; Figure 5 is a cross-sectional view showing a lug forming mold in the embodiment; Figure 6 is a cross-sectional view showing a pre-forged die in the embodiment; Figure 7 is a cross-sectional view showing a pre-preparation in the embodiment FIG. 8 is a cross-sectional view showing a through hole forming mold in the embodiment; FIG. 9 is a flow chart showing an embodiment of a forming method of the female joint of the universal joint of the present invention; FIG. The side view illustrates the female coupling member of the universal joint formed in the present embodiment; and FIG. 11 is a side view, which is an explanatory view of FIG.

Referring to FIG. 2, an embodiment of a molding device for a female joint of a universal joint according to the present invention comprises a pre-forging die 2, a recess forming die 3, a lug forming die 4, a pre-forging die 5, and a The pre-forging hole die 6 and a through-hole forming die 7.

Referring to FIG. 3, the pre-forging die 2 includes a pre-forging die 21, and a pre-forging die 22 reciprocally movable relative to the pre-forging die 21. Referring to Fig. 4, the recess molding die 3 includes a concave molding master 31, and a concave molding die 32 reciprocally movable relative to the recess molding master 31. The concave molding master 31 has a concave molding mother mold body 311, and a concave molding female mold core 312 disposed in the concave molding mother mold body 311. The concave forming female mold body 311 cooperates with the concave forming female mold core 312 to define a receiving groove 313 into which the end of the concave forming male mold body 32 extends. The end of the recess forming female mold 312 has a first projection portion 314 extending in the direction of the concave molding male mold 32. The end of the recess forming male mold 32 has a concave toward the concave The second bump portion 321 extending in the direction of the molding master 31.

Referring to FIG. 5, the lug forming mold 4 includes a mold cavity. A lug forming female mold 41 of 40, and a lug forming male mold 42 reciprocally movable relative to the lug forming female mold 41. The cavity 40 is extendable to the end of the lug forming male mold 42 and has a body region 401, and two are spaced apart from each other and connected to the seat region 401, and are respectively located at the two of the lug forming male molds 42. The lug region 402 on the side.

Referring to FIG. 6, the pre-forging die 5 includes a pre-forged die. 51, and a pre-steering male die 52 reciprocally movable relative to the pre-forged die 51. The pre-slanting forging die 51 has a distal end portion 511 facing the pre-forged male die 52, and four pre-forged portions 512 which are inclined at intervals and are gradually folded toward the pre-forged male die 52. (Because of the viewing angle relationship, two of them are shown in broken lines in Fig. 6). The pre-forged male die 52 has a die portion 521 and a projection 522 extending from the end of the die portion 521 toward the distal end portion 511 of the pre-forged die 51. A step 523 is defined between the mold core portion 521 and the convex portion 522 at two sides of the mold core portion 521.

Referring to FIG. 7, the pre-forging hole die 6 includes a pre-forged hole die. 61, and a pre-forged hole male mold 62 reciprocally movable relative to the pre-forged hole master mold 61. The pre-forged hole master mold 61 includes a punch portion 611 facing the pre-forged hole male mold 62, and four second inclined forged portions 612 which are inclined at intervals and gradually merged toward the pre-forged hole male mold 62. The viewing angle relationship is shown in Fig. 7 as two of them in a broken line.

Referring to FIG. 8, the through hole forming mold 7 includes a through hole forming mother a die 71, and a through hole reciprocally movable relative to the through hole forming master 71 Type male mold 72. The through hole forming master mold 71 has a through hole forming mother mold body 711 surrounding a molding groove 710, and a through hole forming female mold core 712 extending in the molding groove 710. The through-hole forming mother mold body 711 has four inclined surface segments 713 which are inclined at intervals and which are gradually folded in the direction of the through-hole forming male mold 72 (two of them are shown by broken lines in FIG. 8 due to the viewing angle relationship) . The through hole forming male mold 72 has a through hole forming male mold core 721 which is formed in a hollow shape toward the through hole forming mother mold body 711 and surrounds a returning groove 720.

Referring to FIG. 9, the molding of the female joint of the universal joint of the present invention is shown. One embodiment of the method is carried out by using a molding device of the male coupling of the universal joint. Therefore, the device structure described in the embodiment is an embodiment of the molding device of the female coupling of the universal joint. Therefore, I will not repeat them here. The forming method includes a stocking step 81, a pre-forging step 82, a recess processing step 83, a lug processing step 84, a pre-forging step 85, a pre-forging step 86, and a through-hole processing step 87.

In the stocking step 81, a set length of columnar embryos is prepared. Material (not shown). Referring to FIG. 3 and FIG. 9, in the pre-forging step 82, the columnar blank is placed in the pre-forging master 21 of the pre-forging die 2, and the pre-forging die 22 is directed toward the pre-forging die. 21 moves and joins to forge the blank into a pre-forged piece 9 of a set length. Referring to FIG. 4 and FIG. 9, in the recess processing step 83, the pre-forging member 9 is placed in the receiving groove 313 of the concave molding master 31, and the concave molding male mold 32 is matched with the recess. The two ends of the pre-forging member 9 are respectively stamped with a recessed portion 91 by the first bump portion 314 of the recess forming mold 31 and the second bump portion 321 of the recess forming mold 32, and the pre-forging portion is made The outer diameter of 9 is increased.

Referring to Figures 5 and 9, in the lug processing step 84, The pre-forging member 9 is placed in the cavity 40 of the lug forming female mold 41, and the pre-forging member 9 is formed into a seat portion 92 that cooperates with the seat body region 401 in cooperation with the lug forming male mold 42. And two are respectively matched with the lug regions 402 and spaced apart from each other, and are connected to the lug portions 93 of the seat portion 401. An active slot 94 for the movement of the connector (not shown) is defined between the body portion 92 and the lug portions 93. The outer diameter of the pre-forging piece 9 is increased after molding.

Referring to Figures 6 and 9, in the pre-slanting step 85, the pre- The forging member 9 is placed in the pre-slanting forging die 51 in a direction opposite to the upper and lower steps of the previous step, such that the end portion 511 of the pre-steering forging die 51 is abutted against the seat portion 92 of the pre-forging member 9 and located therein. Between the convex lugs 93, the pre-tilted portions 512 are respectively abutted against the side edges of the opposite lug portions 93 on opposite sides. The pre-slanting forging die 51 is mated with the pre-forged male die 52 such that the protruding portion 522 of the pre-forging die 52 is abutted against the outer edge of the remaining recess 91 of the pre-forging 9. The recesses 91 are further pressed to force the lug portions 93 to fill the step 523, respectively. And the side edges of each of the lug portions 93 on opposite sides are pressed to form a pre-tilt section 95, and the distance between the pre-tilt sections 95 of each lug portion 93 is away from the seat body portion. The direction of 92 is gradually reduced, so that the lug portion 93 is gradually folded away from the seat portion 92, and one end of each pre-slanting portion 95 facing the seat portion 92 is not connected to the seat portion 92. After the molding, the outer diameter of the pre-forging member 9 is increased and the inner diameter is constant, and the height of the seat portion 92 is also increased. The pre-slanting step 85 is used to slow the processing of the tilting features and to ensure machining accuracy.

Referring to FIG. 7 and FIG. 9, in the pre-forging hole step 86, The pre-forging member 9 is placed in the pre-forging hole master mold 61 in the same direction as the previous step, and the punch portion 611 is abutted against the seat portion 92 and located between the lug portions 93, and the The second inclined forged portions 612 are respectively abutted against the pre-tilted sections 95 (see FIG. 6). The pre-forged hole master mold 61 is engaged with the pre-forged hole male mold 62, so that the pre-forged hole male mold 62 presses the recessed portion 91 of the pre-forging member 9 (see FIG. 6), so that the depressed portion 91 further forms an inward depression and depth. A blind hole 96 larger than the recessed portion 91. The pre-tilted sections 95 are respectively pressed by the second inclined forged portions 612 to form second inclined sections 97, respectively. The distance between the second inclined segments 97 of each of the lug portions 93 is also gradually decreased toward the direction away from the seat portion 92, and the end of each of the second inclined segments 97 toward the seat portion 92 remains un The seat body 92 is connected. After the molding, the outer diameter of the pre-forging member 9 is increased and the inner diameter is constant, the height of the lug portions 93 is increased, and the height of the seat portion 92 is also increased. The pre-forging step 86 can reduce the processing difficulty and ensure molding accuracy.

Referring to FIG. 8 and FIG. 9, in the through hole processing step 87, The blind hole 96 (see FIG. 7) of the pre-forging piece 9 is placed upward into the molding groove 710 of the through-hole forming mother mold body 711, and the through-hole forming female mold core 712 is abutted against the pre-forging piece 9. When the mold is closed, the through hole forming male mold 721 is the outer edge of the blind hole 96 of the pre-forging piece 9 and continues to push the pre-forging piece 9 downward, and the fixed through hole forming the male mold core The 712 is inserted into the unloading groove 720 that moves downward, and the seat portion 92 of the pre-forging piece 9 is penetrated, so that the pre-forging piece 9 is formed with a through hole 98 penetrating the seat body portion 92 and communicating with the movable groove 94. The inclined sections 713 respectively press the second inclined sections 97 (see FIG. 7), so that the pre-forgings 9 form four inclined sections 99 connecting the seat portions 92, each of the lugs. The portion 93 is gradually folded outward, and each of the slope portions 99 is connected to the seat portion 92. After the molding, the outer diameter of the pre-forging piece 9 is increased and the inner diameter is constant, and the heights of the lug portions 93 are increased, and the inner diameter of the through-holes 98 is the same as the blind holes 96.

Referring to Figures 10 and 11, the above steps can be used to form 10,000 To the female coupling member A of the joint, the female coupling member A includes a seat portion 92 surrounding the uniform hole 98, two lug portions 93 spaced apart from one side of the seat portion 92, and four separate portions A bevel section 99 is formed on the side edges of the opposite lug portions 93 on opposite sides and connected to the seat body portion 92 and disposed obliquely. The distance between the inclined sections 99 of each lug portion 93 is gradually decreased toward the direction away from the seat portion 92 as shown in Fig. 11, so that each lug portion 93 is gradually folded outward. This molding method does not require secondary cutting, which can avoid breaking the continuity of the metal and increase the strength of the finished product, and improve the material utilization rate and reduce the processing time.

In summary, the blank can be formed into one through the above steps. The female joint member A does not need to be subjected to a cutting process, so that the material utilization rate can be improved and the continuity of the material can be avoided, and the processing time and the pass can be saved, so that the object of the present invention can be achieved.

However, the above is only an embodiment of the present invention, when The scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the present invention in the scope of the invention and the patent specification are still within the scope of the invention.

81‧‧‧ Preparation steps

82‧‧‧Pre-forging steps

83‧‧‧ recess processing steps

84‧‧‧Lar processing steps

85‧‧‧Pre-tilting step

86‧‧‧Pre-forging hole steps

87‧‧‧through hole processing steps

Claims (10)

A method for molding a female joint of a universal joint, the molding method comprising: a preparation step of preparing a columnar blank of a set length; and a pre-forging step of placing the columnary blank in a pre-forging die, Forming the columnar billet into a pre-forging piece; a lug processing step, placing the pre-forging piece in a lug forming mold, forming the pre-forging piece into a body portion, and forming the block body at two intervals a lug portion at the same end, the lug portion and the body portion cooperate to form a movable groove; and a through hole processing step of placing the seat portion of the pre-forging member upward in a through hole forming mold, and A through hole extending longitudinally through the seat body is formed on the body portion by means of removing the material. The method of forming a female joint of a universal joint according to claim 1, wherein in the through hole processing step, each of the lug portions are pressed at opposite side edges to form an extension to the seat a beveled section of the body, and each lug portion is gradually folded away from the seat body portion, and each beveled section is connected to the seat body portion. The method for molding a female joint of the universal joint according to claim 2, further comprising a recess processing step between the pre-forging step and the step of processing the lug, wherein the step of processing the recess is the pre-processing The forging piece is placed in a concave forming mold, so that both ends of the pre-forging piece are respectively formed with a concave portion. The method for molding a female joint of the universal joint according to claim 3, further comprising a pre-processing between the step of processing the lug and the step of processing the through hole a forward forging step, in which the pre-forging member is placed in a pre-forged die, so that the side edges of each of the lug portions on opposite sides are pressed to form a pre-tilt portion, respectively. A lug portion is gradually folded away from the body portion, and an end of each pre-tilt portion facing the seat portion is not connected to the seat portion. The method for molding a female joint of the universal joint according to claim 4, further comprising a step of pre-forging between the pre-forging step and the through-hole processing step, in the step of pre-forging The pre-forging piece is placed in a pre-forging hole mold, and the pre-forging piece is further pressed toward the upper concave portion to form an inward depression, and the depth is larger than the blind hole of the concave portion, and each pre-tilt section is pressed Further forming a second inclined section, the distance between the second inclined sections of each of the lug portions away from the one end of the seat body portion is smaller than the distance between the ends of the pre-tilt sections away from the seat body portion, each One end of the two inclined sections facing the seat body is not connected to the seat body portion, and in the through hole processing step, the blind hole of the pre-forging member is placed upward into the through hole forming mold. A molding device for a female joint of a universal joint for processing a columnar blank, the molding device comprising: a pre-forging die, comprising a pre-forging master mold for accommodating the columnar blank, and a a pre-forging male mold reciprocable relative to the pre-forging master mold to form a pre-forging; a lug forming mold comprising a lug forming master mold for receiving the pre-forging member, and a lug relative to the lug a lug forming male mold for reciprocating the forming master mold, the lug forming female mold having a cavity having a cavity a body region, and a lug region connecting the body regions and respectively located on opposite sides of the lug forming male mold; and a through hole forming mold including a through hole forming master mold for receiving the pre-forging member, and a through hole forming male mold reciprocable with respect to the through hole forming master mold, the through hole forming mother mold having a through hole forming mother mold body, and a through hole forming female mold core, the through hole forming mother mold body surrounding a molding groove for accommodating the pre-forging member, the through-hole forming female mold core is extended in the molding groove, and the through-hole forming male mold has a hollow molding shape and a hollow shape toward the through hole The through hole of the trough forms a male mold. The molding device of the female coupling member of the universal joint according to claim 6, wherein the through-hole molding mother body has four inclined and symmetrically inclined inclined surface segments, the inclined surface segments are away from the through hole The direction of the forming male mold is gradually folded. The molding device for the female coupling member of the universal joint according to claim 7, further comprising a concave forming mold, the concave forming mold comprising a concave forming female mold for accommodating the pre-forging, and a relative a concave forming male mold for reciprocating movement of the female mold at the concave portion, the concave forming female mold having a concave forming mother mold body, and a concave forming female mold core disposed in the concave forming female mold body, The concave forming female mold body cooperates with the concave forming female mold body to define a receiving groove for accommodating the pre-forging piece, and the end of the concave forming female mold core has a first direction extending toward the concave forming male mold a bump portion having a second bump portion extending toward the concave molding master in the end of the recess forming male mold. The molding device for the female coupling member of the universal joint according to claim 8 is further provided The invention includes a pre-forging die, the pre-forging die comprising a pre-forging die for accommodating the pre-forging, and a pre-forging male die reciprocable relative to the pre-forging die The oblique forging master mold has a distal end portion facing the pre-slanted forging male mold, and four pre-oblique forged portions which are spaced apart and symmetrically inclined, and the pre-tilted forged portions are gradually received in the direction of the pre-slanted forging male mold The pre-tilted male mold has a mold portion and a projection extending from the end of the mold portion toward the end portion. The molding device for the female coupling member of the universal joint according to claim 9, further comprising a pre-forging hole mold, the pre-forging hole mold comprising a pre-forging hole master mold for accommodating the pre-forging piece, and a relative a pre-forging hole male mold reciprocatingly moving the pre-forged hole master mold, the pre-forging hole master mold comprising a punch portion facing the male mold of the pre-forged hole, and four second oblique forging portions which are spaced apart and symmetrically arranged obliquely, The second inclined forged portion is gradually folded in the direction of the male die of the pre-forged hole.