CN210996266U

CN210996266U - Square step bolt cold heading forming trimming die

Info

Publication number: CN210996266U
Application number: CN201921681921.3U
Authority: CN
Inventors: 范旭超; 范艳普; 张运茂
Original assignee: Ningbo Qingxi Metal Intelligent Technology Co ltd
Current assignee: Ningbo Qingxi Metal Intelligent Technology Co ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-07-14
Anticipated expiration: 2029-10-09

Abstract

The utility model provides a cubic step bolt cold-heading shaping side cut mould belongs to cubic step bolt production technical field. The square step bolt cold heading forming trimming die comprises a stamping die, a shearing knife and a forming die. The stamping die comprises an upper die, a stand column and a mounting seat, wherein the stand column is arranged between the upper die and the mounting seat. The machined part is treated to the punching press post and is processed the shaping, drive telescopic machanism after the shaping, telescopic machanism is cylinder or electric putter, the expansion end through cylinder or electric putter promotes limit baffle and moves down, make limit baffle drive cut the burr at sword downstream to cubic step bolt edge and tailor, the telescopic machanism shrink after shearing, reset spring after the compression promotes limit baffle and shifts up, the sword that shears after the drive moves down shifts up, the shaping chamber that sets up is injectd the shaping to the machined part, the setting of tailorring the die cavity is convenient for tailor unnecessary rim charge, one shot forming.

Description

Square step bolt cold heading forming trimming die

Technical Field

The utility model relates to a square step bolt production field particularly, relates to a square step bolt cold-heading shaping side cut mould.

Background

A cold heading expansion processing method is usually adopted in the traditional process of square step bolt parts, the effective use surface of a square step after expansion processing is only 0.7 time of the height of the step, the step is not full, and the sliding risk is caused during use. The novel process adopts the cold heading forming and trimming process to form the square steps, the effective applicable surface of the square steps is equal to the step height, the steps are full, and the problem of slipping when being applied is solved.

The cold heading process is one of the novel processes for machining less and no cutting metal under pressure. The method is a processing method which utilizes the plastic deformation generated by metal under the action of external force and redistributes and transfers the volume of the metal by means of a die so as to form the required part or blank. The cold heading process is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets, pins, and the like.

The burr after the square step of the square step bolt after the cold heading forming pressing has pressing deformation exists at the edge, and needs to be sheared and removed, the existing process needs to be further processed and cut, the working procedures are increased, the working efficiency is reduced, the production cost is higher, and the mass production is not facilitated.

SUMMERY OF THE UTILITY MODEL

In order to compensate above not enough, the utility model provides a cubic step bolt cold-heading shaping side cut mould aims at improving parts machining production efficiency and manufacturing cost's problem.

The utility model discloses a realize like this:

a square step bolt cold heading forming trimming die comprises a stamping die, a shearing knife and a forming die.

The stamping die comprises an upper die, a stand column and a mounting seat, wherein the stand column is arranged between the upper die and the mounting seat, and a through hole is formed in the middle of the upper die.

The shearing knife is inserted into the through hole in a inserted mode, the shearing knife is arranged in a hollow square mode, the lower surface of the mounting seat is fixedly provided with the stamping column, the lower end of the stamping column is inserted into the hollow position of the shearing knife in an inserted mode, the lower surface of the mounting seat is fixedly provided with the telescopic mechanism, and the telescopic mechanism is connected with the upper end of the shearing knife.

The forming die comprises a lower die, a cushion block and a base, wherein the cushion block is arranged between the lower die and the base, a forming cavity is formed in the middle of the lower die, a bolt hole is formed in the bottom of the forming cavity, a cutting cavity is formed in the edge of an upper port of the forming cavity, a hole groove is formed in the middle of the cushion block and is equal to the inner diameter of the bolt hole, an extrusion assembly is arranged at the bottom of the hole groove, and the cross section of the stamping column is the same as the shape and the specification of the cross section of the forming cavity.

The stamping die is arranged on the upper side of the forming die, and a positioning assembly is arranged between the stamping die and the forming die.

The utility model discloses an in an embodiment, still include reset assembly, reset assembly includes reset spring and limit baffle, the reset spring lower extreme with go up mould fixed connection, limit baffle sets up reset spring's upper end, reset spring upper end with limit baffle lower surface is connected, cut the sword with limit baffle fixed connection.

The utility model discloses an in an embodiment, set up threaded hole on the upper end lateral wall of shearing the sword, the last connecting bolt that is provided with of limit baffle, connecting bolt with screw hole threaded connection.

The utility model discloses an in the embodiment, the blind hole has been seted up to the upper surface of last mould, the blind hole internal fixation has the telescopic link, reset spring cup joints the telescopic link outside.

The utility model discloses an in an embodiment, the telescopic link includes pipe box and slide bar, the one end of slide bar slides and pegs graft in the pipe box, be provided with the stopper in the pipe box, the stopper is fixed the tip of slide bar.

The utility model discloses an in one embodiment, locating component is including location guide pin bushing and locating pin, the location guide pin bushing is fixed to be pegged graft the lower mould upper surface, the locating pin is fixed to be pegged graft the lower surface of last mould, the locating pin with the cooperation of location guide pin bushing is pegged graft.

The utility model discloses an in the embodiment, the die cavity is four directions step die cavity, it is the circular arc die cavity to tailor the die cavity, the punching press post with the die cavity and the coaxial setting of bolt hole.

The utility model discloses an in one embodiment, extrude the subassembly and include pressure spring and sliding sleeve, the sliding sleeve slides and sets up the hole inslot, the pressure spring sets up the sliding sleeve bottom.

The utility model discloses an in the embodiment, reset assembly is provided with two sets ofly, reset assembly symmetry sets up the both sides of punching press post, telescopic machanism is provided with two sets ofly, telescopic machanism symmetry sets up the both sides of punching press post, telescopic machanism is cylinder or electric putter.

The utility model discloses an in one embodiment, the stand sets up the corner of last mould, the stand is fixed the lower surface of last mould, mount pad upper surface with the stand lower extreme is connected.

The utility model has the advantages that: the square step bolt cold heading forming trimming die obtained by the design is used, the punching column processes and forms the workpiece to be processed, drives the telescopic mechanism after forming, the telescopic mechanism is a cylinder or an electric push rod, the movable end of the cylinder or the electric push rod pushes the limit baffle to move downwards, so that the limit baffle drives the shearing knife to move downwards to cut burrs at the edge of the square step bolt, the telescopic mechanism contracts after shearing, through setting up the reset assembly, reset spring through after the compression promotes limit baffle and shifts up, drives the shearing sword after moving down and shifts up, and the shaping is injectd the machined part to the shaping chamber that sets up, and the setting of cutting out the die cavity is convenient for tailor unnecessary rim charge, and one shot forming reduces manufacturing procedure, has improved work efficiency, and reduction in production cost is favorable to going on of batch production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a point a in fig. 1 according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a shearing knife according to an embodiment of the present invention;

fig. 4 is a schematic view of a telescopic rod structure provided by the embodiment of the present invention;

fig. 5 is a schematic view of a forming mold structure according to an embodiment of the present invention.

In the figure: 100-stamping a die; 130-upper die; 133-blind holes; 150-column; 170-mounting seat; 173-punching the column; 175-a shear knife; 177-a telescoping mechanism; 179-threaded hole; 300-forming a mould; 330-lower die; 333-bolt hole; 335-a forming cavity; 337-cutting the cavity; 350-cushion blocks; 370-a base; 500-a reset assembly; 530-a return spring; 550-limit baffle; 553-connecting bolt; 570-telescopic rod; 573-pipe sleeve; 575-sliding bar; 577-a limiting block; 700-an extrusion assembly; 730-pressure spring; 750-sliding sleeves; 900-a positioning assembly; 930-positioning guide sleeves; 950-locating pins.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the utility model provides a. Embodiments, all other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1, the present invention provides a technical solution: a cold heading forming and trimming die for a square step bolt comprises a stamping die 100, a shearing knife 175 and a forming die 300.

Referring to fig. 1 and 2, the stamping die 100 includes an upper die 130, a pillar 150 and a mounting seat 170, the pillar 150 is disposed between the upper die 130 and the mounting seat 170, and a through hole is formed in the middle of the upper die 130.

Please refer to fig. 4, it should be noted that the square step bolt cold heading forming trimming die further includes a reset assembly 500, the reset assembly 500 includes a reset spring 530 and a limit baffle 550, the lower end of the reset spring 530 is fixedly connected with the upper die 130, the upper surface of the upper die 130 is provided with a blind hole 133, a telescopic rod 570 is fixed in the blind hole 133, and the reset spring 530 is sleeved outside the telescopic rod 570; the telescopic rod 570 comprises a pipe sleeve 573 and a sliding rod 575, one end of the sliding rod 575 is inserted into the pipe sleeve 573 in a sliding manner, a limiting block 577 is arranged in the pipe sleeve 573, the limiting block 577 is fixed at the end of the sliding rod 575, the upper limiting baffle 550 is made to move up and down stably by arranging the telescopic rod 570, the limiting baffle 550 is arranged at the upper end of the return spring 530, the upper end of the return spring 530 is connected with the lower surface of the limiting baffle 550, the shearing knife 175 is fixedly connected with the limiting baffle 550, and the return assembly 500 is arranged to drive the shearing knife 175 moving up and return to the.

Referring to fig. 3, the cutting blade 175 is inserted into the through hole, the cutting blade 175 is disposed in a hollow square shape, the lower surface of the mounting seat 170 is fixed with the punching column 173, the lower end of the punching column 173 is inserted into the hollow position of the cutting blade 175, the lower surface of the mounting seat 170 is fixed with the telescopic mechanism 177, the telescopic mechanism 177 is connected with the upper end of the cutting blade 175, and the telescopic mechanism 177 pushes the cutting blade 175 to move downward; cut and seted up screw hole 179 on the upper end lateral wall of sword 175, be provided with connecting bolt 553 on the limit baffle 550, connecting bolt 553 and screw hole 179 threaded connection connect through connecting bolt 553 fixed convenient to detach change, are convenient for maintain shearing sword 175.

Referring to fig. 5, the forming die 300 includes a lower die 330, a cushion block 350 and a base 370, the cushion block 350 is disposed between the lower die 330 and the base 370, the cushion block 350 is fixed between the lower die 330 and the base 370 through a bolt connection, a forming cavity 335 is disposed in the middle of the lower die 330, a bolt hole 333 is disposed at the bottom of the forming cavity 335, a cutting cavity 337 is disposed at the edge of the upper port of the forming cavity 335, the forming cavity 335 is a square step cavity, the cutting cavity 337 is an arc cavity, the formed cavity 335 defines and forms a workpiece, the cutting cavity 337 is disposed to facilitate cutting of excess rim charge, the punching post 173, the forming cavity 335 and the bolt hole 333 are coaxially disposed, a hole groove is disposed in the middle of the cushion block 350, the hole groove has an inner diameter equal to that of the bolt hole 333, an extrusion assembly 700 is disposed at the bottom of the hole groove; the extrusion assembly 700 comprises a pressure spring 730 and a sliding sleeve 750, the sliding sleeve 750 is arranged in a hole groove in a sliding mode, the pressure spring 730 is arranged at the bottom of the sliding sleeve 750, and a workpiece is pushed to extend out of the forming cavity 335 through the extrusion assembly 700, so that blanking is facilitated.

Referring to fig. 1, the stamping die 100 is disposed on the upper side of the forming die 300, and a positioning assembly 900 is disposed between the stamping die 100 and the forming die 300; the positioning assembly 900 comprises a positioning guide sleeve 930 and a positioning pin 950, the positioning guide sleeve 930 is fixedly inserted on the upper surface of the lower die 330, the positioning pin 950 is fixedly inserted on the lower surface of the upper die 130, and the positioning pin 950 is fittingly inserted with the positioning guide sleeve 930.

Specifically, in this embodiment, the subassembly 500 resets is provided with two sets ofly, the subassembly 500 symmetry that resets sets up in the both sides of punching press post 173, telescopic machanism 177 is provided with two sets ofly, telescopic machanism 177 symmetry sets up in the both sides of punching press post 173, bilateral symmetry sets up, make the atress during the punching press even, improve processingquality, telescopic machanism 177 is cylinder or electric putter, the expansion end through cylinder or electric putter promotes limit baffle 550 and moves down, make limit baffle 550 drive shear knife 175 downstream cut out the burr at four directions step bolt edge.

Specifically, in the present embodiment, the pillar 150 is disposed at a corner of the upper mold 130, the pillar 150 is fixed to a lower surface of the upper mold 130, and an upper surface of the mounting seat 170 is connected to a lower end of the pillar 150.

The working principle of the square step bolt cold heading forming trimming die is as follows: when the punching die 100 is used, a workpiece to be machined is arranged in the forming cavity 335 by fixedly installing the punching die 100 on a cold header or a crank press or a friction press, the positioning assembly 900 is arranged to ensure that the punching column 173 at the bottom of the punching die 100 is driven to be matched, inserted and pressed with the forming cavity 335 on the upper surface of the forming die 300, the possibility of dislocation is reduced, the punching column 173 is used for machining and forming the workpiece to be machined, the telescopic mechanism 177 is driven after forming, the telescopic mechanism 177 is an air cylinder or an electric push rod, the movable end of the air cylinder or the electric push rod pushes the limit baffle 550 to move downwards, the limit baffle 550 drives the shearing knife 175 to move downwards to cut burrs at the edge of the square step bolt, the telescopic mechanism 177 shrinks after shearing, the reset assembly 500 is arranged, the reset spring 530 after compression pushes the limit baffle 550 to move upwards to drive the shearing knife 175 after downward movement to, the shaping chamber 335 that sets up prescribes a limit to the shaping to the machined part, and the setting of tailorring die cavity 337 is convenient for tailor unnecessary rim charge, and one shot forming reduces manufacturing procedure, has improved work efficiency, and reduction in production cost is favorable to going on of batch production.

It should be noted that the specific model specification of the air cylinder or the electric push rod in the specification needs to be determined by model selection according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, so detailed description is omitted.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold heading forming trimming die for a square step bolt is characterized by comprising

The stamping die (100) comprises an upper die (130), an upright post (150) and a mounting seat (170), wherein the upright post (150) is arranged between the upper die (130) and the mounting seat (170), and a through hole is formed in the middle of the upper die (130);

the shearing knife (175) is inserted into the through hole, the shearing knife (175) is arranged in a hollow square shape, a punching column (173) is fixed on the lower surface of the mounting seat (170), the lower end of the punching column (173) is inserted into the hollow position of the shearing knife (175), a telescopic mechanism (177) is fixed on the lower surface of the mounting seat (170), and the telescopic mechanism (177) is connected with the upper end of the shearing knife (175);

the forming die (300) comprises a lower die (330), a cushion block (350) and a base (370), the cushion block (350) is arranged between the lower die (330) and the base (370), a forming cavity (335) is formed in the middle of the lower die (330), a bolt hole (333) is formed in the bottom of the forming cavity (335), a cutting cavity (337) is formed in the edge of the upper port of the forming cavity (335), a hole groove is formed in the middle of the cushion block (350), the inner diameter of the hole groove is equal to that of the bolt hole (333), an extrusion assembly (700) is arranged at the bottom of the hole groove, and the cross section of the stamping column (173) is the same as the cross section shape and specification of the forming cavity (335);

the stamping die (100) is arranged on the upper side of the forming die (300), and a positioning assembly (900) is arranged between the stamping die (100) and the forming die (300).

2. The cold heading forming trimming die for the square stepped bolts as claimed in claim 1, further comprising a reset assembly (500), wherein the reset assembly (500) comprises a reset spring (530) and a limit baffle (550), the lower end of the reset spring (530) is fixedly connected with the upper die (130), the limit baffle (550) is arranged at the upper end of the reset spring (530), the upper end of the reset spring (530) is connected with the lower surface of the limit baffle (550), and the shearing knife (175) is fixedly connected with the limit baffle (550).

3. The cold heading forming and trimming die for the square step bolt as claimed in claim 2, wherein a threaded hole (179) is formed in the upper end side wall of the shearing knife (175), a connecting bolt (553) is arranged on the limit baffle (550), and the connecting bolt (553) is in threaded connection with the threaded hole (179).

4. The cold-heading forming and trimming die for the square stepped bolts as claimed in claim 3, wherein a blind hole (133) is formed in the upper surface of the upper die (130), a telescopic rod (570) is fixed in the blind hole (133), and the return spring (530) is sleeved outside the telescopic rod (570).

5. The cold heading forming trimming die for the square stepped bolt as claimed in claim 4, wherein the telescopic rod (570) comprises a pipe sleeve (573) and a sliding rod (575), one end of the sliding rod (575) is slidably inserted into the pipe sleeve (573), a stopper (577) is arranged in the pipe sleeve (573), and the stopper (577) is fixed at the end of the sliding rod (575).

6. The cold heading forming trimming die for the square step bolt as claimed in claim 1, wherein the positioning assembly (900) comprises a positioning guide sleeve (930) and a positioning pin (950), the positioning guide sleeve (930) is fixedly inserted on the upper surface of the lower die (330), the positioning pin (950) is fixedly inserted on the lower surface of the upper die (130), and the positioning pin (950) is fittingly inserted with the positioning guide sleeve (930).

7. The cold heading forming trimming die for the square step bolt as claimed in claim 1, wherein the forming cavity (335) is a square step cavity, the cutting cavity (337) is a circular arc cavity, and the stamping column (173) and the forming cavity (335) are coaxially arranged with the bolt hole (333).

8. The cold heading trimming die for the square stepped bolt according to claim 1, wherein the extrusion assembly (700) comprises a compression spring (730) and a sliding sleeve (750), the sliding sleeve (750) is slidably disposed in the hole slot, and the compression spring (730) is disposed at the bottom of the sliding sleeve (750).

9. The cold heading forming trimming die for the square stepped bolt as claimed in claim 2, wherein the reset assemblies (500) are arranged in two groups, the reset assemblies (500) are symmetrically arranged on two sides of the stamping column (173), the telescopic mechanisms (177) are arranged in two groups, the telescopic mechanisms (177) are symmetrically arranged on two sides of the stamping column (173), and the telescopic mechanisms (177) are air cylinders or electric push rods.

10. The cold heading forming and trimming die for the square step bolt as claimed in claim 1, wherein the upright posts (150) are arranged at the corners of the upper die (130), the upright posts (150) are fixed on the lower surface of the upper die (130), and the upper surface of the mounting seat (170) is connected with the lower ends of the upright posts (150).