CN215392282U

CN215392282U - Efficient forming device for arc shape of end face of bolt rod part

Info

Publication number: CN215392282U
Application number: CN202122984423.XU
Authority: CN
Inventors: 王长土
Original assignee: Ningbo Changhua Changsheng Auto Parts Co ltd
Current assignee: Ningbo Changhua Changsheng Auto Parts Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-01-04
Anticipated expiration: 2031-12-01

Abstract

The utility model relates to a high-efficiency forming device for an arc shape of an end face of a bolt rod part, which comprises a first station die and a second station die, wherein the first station die comprises a first stamping die and a first main die, the first stamping die is of a solid structure, a die cavity of the first stamping die is of an arc concave shape, the first main die comprises a first forming die and a first ejection ejector rod, and a gap is formed between the first stamping die and the first main die during die assembly; the second station die comprises a second punching die and a second main die, the second punching die comprises a punching rod, a pushing sleeve and a die sleeve, the die sleeve is provided with an accommodating space, the pushing sleeve is arranged in the accommodating space, one end of the pushing sleeve protrudes out of the die sleeve, the pushing sleeve is provided with a middle through hole, and the punching rod is arranged in the middle through hole. The application has effectively formed the circular arc part of stud pole portion terminal surface, has thoroughly replaced car manufacturing procedure, has reduced human cost and manufacturing cost, has reduced the product circulation cycle.

Description

Efficient forming device for arc shape of end face of bolt rod part

Technical Field

The utility model relates to a metal cold forming technology, in particular to a forming device which meets the manufacturing requirement of an automobile fastener and has high efficiency for realizing the circular arc shape of a cylindrical end surface.

Background

In the field of automobile fastener manufacturing, the shape of the fastener is mainly formed by cold heading and cold extrusion, and the process is mainly characterized in that products are produced on the basis of not removing or slightly removing materials, the application theory is the plastic deformation of metal, and the process has the advantages of high production efficiency, good product consistency, stable quality and the like. In a developed product, a stud with a rod part end surface required to be circular-arc is provided, the stud is a fastener commonly used for assembling an automobile engine shell and is composed of two sections of threads, wherein one section is interference threads (3 k) and the other section is common threads (6 h), and the stud needs to be accurately separated in the assembling process; in addition, when the threads at one end are screwed down firstly, the other end needs to be used as a driving end, and the end face of the screw needs to be inserted into the sleeve; the threaded end faces also need to be stressed during tightening. The end face of one end of the screw is designed to be arc-shaped, so that the direction can be effectively distinguished, the screw is guided into the sleeve, and the threads cannot deform when the end face is stressed.

The arc end face cannot be realized by the existing forming technology, and the arc processing and turning correspondence needs to be added after cold forming. The turning has the defects of low production efficiency, unstable arc size, missed turning, reverse turning and the like.

Therefore, the forming device of the prior art with the arc-shaped end surface of the bolt rod part also has a lifting place.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a forming device which can efficiently realize the arc shape of a cylindrical end surface and meets the manufacturing requirement of an automobile fastener, so as to solve the prior technical problem.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a high-efficiency forming device for an arc-shaped end face of a bolt shank comprises a first station die and a second station die, wherein the first station die comprises a first stamping die and a first main die, the first stamping die is of a solid structure, a die cavity of the first stamping die is in an arc shape, the first main die comprises a first forming die and a first ejection ejector rod, the first ejection ejector rod is arranged in the die cavity of the first forming die, and the die cavity of the first forming die is in a conical shape at the position of the end face of the first ejection ejector rod; when the die is closed, a gap is reserved between the first stamping die and the first main die; the second station die comprises a second stamping die and a second main die, the second stamping die comprises a stamping rod, a pushing sleeve and a die sleeve, the die sleeve is provided with an accommodating space, the pushing sleeve is arranged in the accommodating space, one end of the pushing sleeve comprises a radially convex circular supporting surface, the circular supporting surface is connected with a step surface of the accommodating space in a clamping manner, the other end of the pushing sleeve protrudes out of the die sleeve, the pushing sleeve is provided with a middle through hole, the stamping rod is arranged in the middle through hole, and the end face of the stamping rod facing the second main die is arc-shaped; the second main die comprises a second forming die and a second ejection ejector rod.

According to the efficient forming device for the arc-shaped end face of the bolt rod part, the bottom of the die cavity of the first die comprises the through air hole.

In the forming device of the arc shape of the end face of the bolt rod part of the high efficiency in the preferred embodiment of the present application, the second punching die further includes a spring, the spring is disposed in the accommodating space, and two ends of the spring are respectively connected to the pushing sleeve and the inner wall of the accommodating space.

The design idea of the application is that redundant flash is formed through enough large deformation, the full requirement of end face arc forming is met, the redundant flash is cut off through a reasonable die structure, and the forming of reducing can be further carried out on subsequent stations.

Due to the adoption of the technical scheme, the utility model has the following advantages and effects:

firstly, the forming device improves the quality of the bolt and reduces the production cost;

secondly, the forming process of the forming device is stable in forming, high in reliability and simple in debugging, and can meet the requirement of batch production of products;

third, this application forming device has effectively formed the circular arc part of stud pole portion terminal surface, has thoroughly replaced the car manufacturing procedure, has reduced human cost and manufacturing cost, has reduced the product circulation cycle.

Of course, implementing any particular embodiment of the present disclosure does not necessarily have all of the above technical advantages at the same time.

Drawings

FIG. 1 is a schematic view of a first station die of the present application;

FIG. 2 is a schematic view of the closing of a first station die of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of a second station die of the present application;

FIG. 5 is a schematic view of the closing of a second station mold according to the present application;

FIG. 6 is an enlarged view of a portion of FIG. 5;

fig. 7 is a schematic view of flash detachment according to the present application.

Detailed Description

For the purpose of understanding, preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 and 4, a first station die schematic diagram and a second station die schematic diagram of the present application, the forming technology of the present application includes two stations, the first station is used for upsetting and extruding to form an arc and generate flash; the second station is used for cutting off the flash, the flash is separated from the product and then left on the die, and the flash can be separated from the die through oil flushing or air blowing technology and fall to a waste port. It should be noted that there are many components of the forming machine, the present application is directed to the technical features of the first station die and the second station die, and other components are prior art and will not be described herein again.

The following explains the forming device of efficient shank of bolt portion terminal surface circular arc shape of this application, forming device includes first station mould and second station mould, first station mould includes first die 2 and first master mode, first die 2 is solid construction, and is exactly a closely knit block and is used for bearing big striking strength, the die cavity of first die 2 is circular-arc sunken and contains transition chamfer size, mainly used shaping circular arc size, has diameter 0.5 to link up gas pocket 12 at the die cavity bottom, link up gas pocket 12 and be used for getting rid of air and lubricating oil, is favorable to the metal flow, guarantees that the circular arc takes shape fully. When the die is closed, as shown in fig. 2 and 3, a gap is formed between the first die 2 and the first main die, and a flash is generated in the gap, and the flash is not a product component and is a structure which is fully extruded and is increased to ensure the circular arc to be full. The first main die comprises a first forming die 3 and a first ejection ejector rod 4, the first ejection ejector rod 4 is arranged in a die cavity of the first forming die 3 and used for ejecting a die material after forming, the die cavity of the first forming die 3 is conical at the position of the end face of the first ejection ejector rod 4, the conical shape is a conical surface with different diameters in fig. 1 and can extrude the die material to form a chamfer, the first forming die 3 is used for forming the chamfer, and the chamfer is beneficial for the die material 5 to enter the die cavity of a second main die at a second station; and the first ejection ejector rod 4 pushes the formed mold material 5 out of the mold cavity of the first forming mold 3.

As shown in fig. 4, the second station die includes a second punch die and a second main die, the second punch die is used for cutting off excess flash after the first station die is formed, the second punch die includes a punch 8, a push sleeve 9 and a die sleeve 6, the die sleeve 6 is provided with an accommodating space, the push sleeve 9 is disposed in the accommodating space, as shown in the drawing, one end of the push sleeve 9 includes a radially protruding circular support surface, after assembly, the circular support surface is in snap-fit connection with the stepped surface of the accommodating space, the other end of the push sleeve 9 protrudes out of the die sleeve 6, the push sleeve 9 is provided with a middle through hole, the punch 8 is disposed in the middle through hole, and the end surface of the punch 8 facing the second main die is spaced from the end surface of the push sleeve 9, as shown in the drawing, the end surface of the punch 8 facing the second main die is arc; the second main die comprises a second forming die 10 and a second ejection ejector rod 11, the main die opening part of the second forming die 10 is required to be relatively sharp, a fillet R0.1-R0.2 is formed, and the die opening cuts off redundant flash on the die material 5 by utilizing shearing force.

As shown in fig. 4, the second die further includes a spring 7, the spring 7 is disposed in the accommodating space, and two ends of the spring 7 are respectively connected to the push sleeve 9 and an inner wall of the accommodating space. And in the forming process, the second punching die punches the die material 5 formed at the first station into the second main die, and the action of cutting the flash at the die orifice of the second main die is completed. When the second punching die is withdrawn, the flash is separated from the die material 5 together with the second punching die, and then the flash is separated from the second punching die through oil punching or air blowing, and the second ejection ejector rod 11 ejects the die material 5 out of the die cavity of the second main die. In the pushing process, the pushing sleeve 9 is supported by the spring 7, so that the pushing sleeve 9 always has certain elasticity, the arc-shaped mold material can be clamped in an inner hole of the pushing sleeve 9, the mold material can stably enter the mold cavity of the second main mold, and one end of the mold material entering the second main mold is chamfered, so that the problem that the mold material is scratched when the mold opening of the second main mold is relatively sharp can be avoided.

When the production process is carried out, referring to fig. 1, fig. 2 and fig. 3, a schematic diagram of upsetting, extruding and forming an arc and generating a flash at a first station is shown, a cylindrical blank 1 is moved to a die orifice of a first forming die 3 of a first main die through a clamping mechanism (not shown), the first die 2 pushes the blank into a die cavity of the first forming die 3, the extrusion and upsetting are continued, a forming is completed, a die material 5 is obtained, a first ejection ejector rod 4 pushes the formed die material 5 out of the die orifice of the first forming die 3, and the process of upsetting, extruding and forming the arc and generating the flash at the blank 1 is completed.

Referring to fig. 4, 5 and 6, the second station is used for cutting off the flash, the flash is left on the die after being separated from the product, and the flash can be separated from the die by oil flushing or air blowing, and falls to a scrap opening, as shown in the figure, the die material 5 is moved to a die opening of a second main die by a clamping mechanism (not shown), the back of a push sleeve 9 in the second die is supported by a spring 7, the front end of the push sleeve 9 is sleeved on the arc end surface of the formed die material 5, the die material 5 is pushed into a die cavity of the second main die, and the structure that the spring 7 is used for supporting the push sleeve 9 can prevent the die material 5 from tilting when entering the die opening, so that the die material is scratched by the die opening. The push sleeve 9 pushes the die material 5 to the flash to be in contact with the die surface of the second main die, the second die continues to move forwards, the spring 7 continues to compress, the punch rod 8 in the second die pushes the die material 5, the die material 5 continues to be pushed into the die cavity of the second main die, at the moment of being pushed into the die cavity of the second main die, the flash is cut off by the die opening of the second main die, the punch rod 8 continues to push the die material 5 into the die cavity of the second main die, the flash is completely separated from the die material, and at the moment, the flash is sleeved on the punch rod 8. After the die material 5 is separated from the flash, the second die begins to retreat backwards, in the retreating process, the spring 7 begins to rebound, the push sleeve 9 pushes the annular flash away from the punch rod 8, as shown in fig. 7, then the flash directly falls or adheres to the end face of the push sleeve 9, and the flash is separated from the push sleeve 9 through cooling oil impact or air gun blowing, so that the forming process is completed.

The technology that this application provided can realize cold forming processing one shot forming under the mode of getting rid of few material, very big improvement production efficiency and product quality's stability.

Of course, it is not necessary for any particular embodiment of the inventive concept to be implemented to achieve all of the above technical effects at the same time.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and it is intended that all equivalent variations and modifications of the present invention as those skilled in the art can be made without departing from the spirit and scope of the present invention.

Claims

1. The efficient forming device for the arc-shaped end face of the bolt shank is characterized by comprising a first station die and a second station die, wherein the first station die comprises a first stamping die and a first main die, the first stamping die is of a solid structure, a die cavity of the first stamping die is in an arc shape, the first main die comprises a first forming die and a first ejection ejector rod, the first ejection ejector rod is arranged in the die cavity of the first forming die, and the die cavity of the first forming die is in a conical shape at the position of the end face of the first ejection ejector rod; when the die is closed, a gap is reserved between the first stamping die and the first main die;

the second station die comprises a second stamping die and a second main die, the second stamping die comprises a stamping rod, a pushing sleeve and a die sleeve, the die sleeve is provided with an accommodating space, the pushing sleeve is arranged in the accommodating space, one end of the pushing sleeve comprises a radially convex circular supporting surface, the circular supporting surface is connected with a step surface of the accommodating space in a clamping manner, the other end of the pushing sleeve protrudes out of the die sleeve, the pushing sleeve is provided with a middle through hole, the stamping rod is arranged in the middle through hole, and the end face of the stamping rod facing the second main die is arc-shaped; the second main die comprises a second forming die and a second ejection ejector rod.

2. The efficient bolt shank end face arc shape forming apparatus of claim 1, wherein the bottom of the cavity of the first die includes a through air hole.

3. The efficient forming device for the arc shape of the end surface of the bolt shank according to claim 1, wherein the second die further comprises a spring, the spring is arranged in the accommodating space, and two ends of the spring are respectively connected with the pushing sleeve and the inner wall of the accommodating space.