CN212598337U - Ball stud opening and closing die - Google Patents

Abstract

The utility model provides a ball head bolt opening and closing die, belonging to the field of drawing dies, comprising a die sleeve, a middle sleeve, a die core and a lower part forming die; the middle sleeve is fixed on the die sleeve, a truncated cone-shaped shrinkage hole is formed in the middle sleeve, hemispherical surfaces are arranged on the opposite surfaces of the die core and the lower forming die, a hole matched with the rod part of the bolt is formed in the middle of the die core, the die core comprises three die halves which are divided along the circumferential direction, telescopic columns and telescopic grooves for accommodating the telescopic columns are respectively arranged on the opposite side surfaces of the two die halves, the outer side surfaces of the die halves are in contact fit with the inner wall of the shrinkage hole, and compression springs are sleeved outside the telescopic columns; and an ejection hole for the ejector pin to pass through is formed in the middle of the lower forming die. The utility model provides a problem that the turning bulb material utilization rate that exists is low among the prior art.

Description

Ball stud opening and closing die

Technical Field

The utility model relates to a tensile mould, more specifically the theory relates to a bulb die that opens and shuts.

Background

The machining of the ball stud is usually realized by turning, and meanwhile, the machining can be finished by the matched rotation of the feeding cutter and the chuck, but the utilization rate of materials for turning is low. Turning is particularly inconvenient for some products with irregular connection of the shaft part and the bulb part.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model provides a ball stud die that opens and shuts, it has solved the problem that the turning bulb material utilization rate that exists is low among the prior art.

The utility model provides a ball head bolt opening and closing die, which comprises a die sleeve, a middle sleeve, a die core and a lower forming die; the middle sleeve is fixed on the die sleeve, a truncated cone-shaped shrinkage hole is formed in the middle sleeve, hemispherical surfaces are arranged on the opposite surfaces of the die core and the lower forming die, a hole matched with the rod part of the bolt is formed in the middle of the die core, the die core comprises every three die segments, telescopic columns and telescopic grooves for accommodating the telescopic columns are respectively arranged on the opposite side surfaces of the two die segments, the outer side surfaces of the die segments are in contact fit with the inner wall of the shrinkage hole, and compression springs are sleeved outside the telescopic columns; and an ejection hole for the ejector pin to pass through is formed in the middle of the lower forming die.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model utilizes the matching of the middle sleeve and the mold core, and the workpiece is fed into the mold cavity under the action of the feeding structure; the mould halves move towards the contraction direction of the contraction hole and are closed, and finally the mould halves are completely attached to match with the lower forming mould to form a spherical membrane; after the forming, the feeding structure is withdrawn, and the mold cores are automatically and radially separated from each other under the action of the compression spring, so that the machined workpiece can be ejected out through the ejector pins. The utility model discloses can accomplish the compound die shaping of bulb with the help of traditional stamping equipment, the work piece syntropy is taken out, compares in lathe work, does not have the loss of material almost.

Drawings

Fig. 1 is an overall schematic view of the present invention.

Fig. 2 is a schematic view of the mold halves mating with the intermediate sleeve when deployed.

The die comprises a die sleeve 1, a middle sleeve 2, a die core 3, a lower forming die 4, a thimble 5, a cushion die 6, a top block 7, a contraction hole 21, a die section 31, a telescopic column 32, a telescopic groove 33, a compression spring 34 and a guide rod 35.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 1 and 2, the utility model provides a ball stud opening and closing die, which comprises a die sleeve 1, a middle sleeve 2, a die core 3 and a lower forming die 4; the middle sleeve 2 is fixed on the die sleeve 1, a truncated cone-shaped shrinkage hole 21 is arranged in the middle sleeve 2, hemispherical surfaces are arranged on the opposite surfaces of the die core 3 and the lower forming die 4, a hole matched with the rod part of the bolt is arranged in the middle of the die core 3, the die core 3 comprises three die halves 31 divided along the circumferential direction, telescopic columns 32 and telescopic grooves 33 for accommodating the telescopic columns 32 are respectively arranged on the opposite side surfaces of the two die halves 31, the outer side surfaces of the die halves 31 are in contact fit with the inner wall of the shrinkage hole 21, and compression springs 34 are sleeved outside the telescopic columns 32; and an ejection hole for the thimble 5 to pass through is formed in the middle of the lower forming die 4. According to the above technical scheme, the utility model discloses a working process does: because of the action of the compression spring 34, the telescopic column 32 and the telescopic groove 33, the gravity action is overcome, each mould section 31 is in a separated state at first, when the material is sent down from the upper part, the mould section 31 is pushed downwards, at the moment, the compression spring 34 starts to compress, the telescopic column 32 moves towards the inside of the telescopic groove 33, the mould sections 31 are gradually closed, and the mould sections are completely closed when the lower part of the middle sleeve 2 is reached and form a spherical mould cavity with the lower forming mould 4; meanwhile, the material is gradually extruded and deformed by pressure to form the ball head. After the forming is finished, the feeding structure retracts, at the moment, the die section 31 is opened again due to the elastic force of the compression spring 34, a space for taking out the ball head is reserved in the middle, and then the machined workpiece is taken out through the ejector pin 5. The diameter of the lower end of the shrinkage hole 21 is the same as that of the lower end of the mold core 3, the mold core 3 is just positioned at the lower part of the shrinkage hole 21 after being shrunk, a lower part forming mold 4 can be conveniently arranged to be matched with the shrinkage hole, and meanwhile, the maximum stress area of the periphery of the mold core 3 is ensured. And a die cover is arranged at the upper end of the contraction hole 21, and a through hole for the workpiece to stretch into and take out is formed in the die cover. The mold cover can prevent the mold core 3 from being removed upward from the shrinkage cavity 21. It should be noted that, since the feeding portion has the same function as the conventional stamping feeding, a person skilled in the art can set the feeding portion according to experience, and thus a specific structure is not given.

Further, a cushion die 6 is arranged in the die sleeve 1, the lower end of the cushion die 6 is flush with the bottom of the die sleeve 1, the lower forming die 4 is fixed on the cushion die 6, a mounting hole is formed in the middle of the cushion die 6, two ends of the ejector pin 5 are respectively located in the mounting hole and the ejection hole, an ejector block 7 for driving the ejector pin 5 to move in the vertical direction is further arranged in the mounting hole, and the ejector pin 5 is fixed on the ejector block 7. The ejector block 7 is matched with the mounting hole, so that the ejector pin 5 is more stable up and down, and meanwhile, the ejector block 7 provides a fixed mounting space for the end part of the ejector pin 5. The die sleeve 1 is fixedly arranged, the lower end of the die sleeve is supported by a fixing plate fixedly connected with equipment, one end of the ejector block 7 penetrates through the fixing plate, a driving plate is arranged at the lower end of the ejector block, connecting rods are fixed on two sides of the driving plate, and the connecting rods vertically penetrate through the fixing plate and are fixedly connected with a feeding part of the equipment. A general formed power device is a hydraulic machine, and a connecting rod can be fixed with a piston rod of the hydraulic machine, so that the ejector pin 5 can move up and down along with the stamping, the situation that the ejector pin 5 retracts untimely or is ejected in advance can not occur, and the ejector pin 5 is prevented from being damaged.

Further, be equipped with guide bar 35 in the flexible groove 33, the coaxial guiding hole that is equipped with in the flexible post 32, guide bar 35 one end sliding connection is in the guiding hole, and the other end is fixed in flexible groove 33 bottom, one of them end of compression spring 34 is fixed in flexible groove 33 bottom. The guide rod 35 plays a role in guiding and can prevent the spring or the telescopic column 32 from deviating and damaging the spring.

Further, the central angle corresponding to the arc surface of each mold half 31 is 120 °, and the planes on both sides of each mold half 31 are respectively provided with a telescopic groove 33 and a telescopic column 32. Thus, each mould half 31 is the same, and can be replaced for use at any time when damaged; and the motion track of each mold half 31 is easier to grasp.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (5)

1. The ball stud opening and closing die is characterized by comprising a die sleeve, a middle sleeve, a die core and a lower forming die; the middle sleeve is fixed on the die sleeve, a truncated cone-shaped shrinkage hole is arranged in the middle sleeve, hemispherical surfaces are arranged on the opposite surfaces of the die core and the lower forming die, a hole matched with the rod part of the bolt is formed in the middle of the die core, the die core comprises three die halves which are divided along the circumferential direction, the opposite side surfaces of the two die halves are respectively provided with a telescopic column and a telescopic groove for accommodating the telescopic column, a compression spring is sleeved outside the telescopic column, and the outer side surfaces of the die halves are in contact fit with the inner wall of the shrinkage hole; and an ejection hole for the ejector pin to pass through is formed in the middle of the lower forming die.

2. The ball stud opening and closing die as claimed in claim 1, wherein a cushion die is provided in the die case, a lower end of the cushion die is flush with a bottom of the die case, the lower forming die is fixed to the die cushion, a mounting hole is provided in a middle of the cushion die, both ends of the ejector pin are respectively located in the mounting hole and the ejector hole, an ejector block for driving the ejector pin to move in a vertical direction is further provided in the mounting hole, and the ejector pin is fixed to the ejector block.

3. The ball stud opening and closing die as claimed in claim 1 or 2, wherein a guide rod is provided in the telescopic slot, a guide hole is coaxially provided in the telescopic post, one end of the guide rod is slidably connected in the guide hole, the other end of the guide rod is fixed to the bottom of the telescopic slot, and one end of the compression spring is fixed to the bottom of the telescopic slot.

4. The ball stud split mold of claim 3, wherein the arc surface of each mold half has a corresponding central angle of 120 °, and the flat surfaces on both sides of each mold half are provided with a telescopic groove and a telescopic post, respectively.

5. The ball stud opening and closing die according to claim 4, wherein the lower end of the shrinkage hole has the same diameter as the lower end of the die core, and the upper end of the shrinkage hole is provided with a die cover, and the die cover is provided with a through hole for inserting and removing a workpiece.

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