CN217990819U

CN217990819U - Stamping rod and cold heading mechanism with same

Info

Publication number: CN217990819U
Application number: CN202221848124.1U
Authority: CN
Inventors: 陈前
Original assignee: Taizhou Gubei Auto Parts Co ltd
Current assignee: Taizhou Gubei Auto Parts Co ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2022-12-09
Anticipated expiration: 2032-07-15

Abstract

The utility model discloses a dash stick and take cold heading mechanism of towards stick belongs to cold heading processing technology field, the problem of showing how the roughness improves in the work piece processing has been solved, its technical scheme main points are towards the stick has been designed, the side that is close to the tip on the head of towards the stick is provided with at least one ring of drawing light, perhaps utilize towards the stick assembly to strike on cold heading mechanism, set up the bed die in the upset die holder, the assembly is towards the stick in the bed die, the pole is spacing to slide in the bed die, the rear of upset die holder is provided with the pendulum fork, the pendulum fork slides through ball cover and upset die holder and is connected, the middle part of pendulum fork articulates on the support, the support is fixed on the slider, fixed the assembly is equipped with the upset guide pillar on the slider, be provided with the passageway in the upset guide pillar, be provided with the spring in the passageway, the ejector pin assembly is contradicted with the spring and the other end is contradicted on the rear end of upset die holder in the passageway, reduce the vibration to towards the stick, the improvement machining precision has been reached, the surface roughness, the output is improved, reduce manufacturing cost's effect.

Description

Stamping rod and cold heading mechanism with same

Technical Field

The utility model relates to a cold-heading processing technology field especially relates to a dash stick and take cold-heading mechanism towards stick.

Background

At present, automobile parts, such as a shock absorber bushing and other automobile parts, are mostly machined and manufactured by a cold heading machine, and the cold heading process can be used for machining parts with various specifications. The cold heading process is introduced as follows:

(1) According to the metal deformation theory, a certain pressure is applied to a metal blank at normal temperature to cause the metal blank to deform in a die cavity, and the metal blank is molded according to a specified shape and size.

(2) It is necessary to select a good quality metallic material with good "flow" properties, such as rivet and screw steel, which have strict standards for chemical composition and mechanical properties.

(3) The cold heading bolt and nut forming machine has various models and series of models. The equipment performance is reliable, the efficiency is high, and the product quality is stable.

(4) The product has large forming upsetting force and large equipment investment at one time due to the configuration power. Therefore, the production specification M24 or less is most economical.

(5) Has better surface quality and higher dimensional accuracy. Because of the cold work hardening during the upsetting process, the deformation is not suitable to be too large. And cracking is reduced.

(6) The cold heading process is applicable to products with large batch and various specifications, so that the cost can be reduced.

The modern cold header has been added to a multi-station domestic newer variety from the past simple two-station, namely, a 5-die 6-die lengthened cold header.

In the process of producing the bush, when the last step of cold heading is found, the inner surface of the bush has lines, namely the inner surface is not smooth, researches find that the influence on the inner surface of a product is very serious after the punching of a punching rod in the last step of cold heading, when a hollow inner wall product, such as the inner wall of the bush, needs to be subjected to cold heading, the punching rod with a polished rod structure is adopted for punching, and the inner wall forms more obvious punching marks after punching, such as more shallow marks like water lines, which influences the quality of the bush, so that the processing quality needs to be further improved.

Therefore, how to improve the smoothness of the inner wall of the punched hole is a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, solve the technical problem in the correlation technique to a certain extent at least, provide a cold-heading mechanism towards stick and area towards stick, have and can improve towards the smooth degree of hole inner wall and the advantage of adaptation in cold junction mechanism.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a punching rod, includes the punching rod main part, and the punching rod main part includes base portion, neck and head, passes through the cambered surface transition between neck and the base portion, and the neck diameter is less than base portion diameter, passes through the cambered surface transition between head and the neck, and the head diameter is less than base portion diameter, the side that is close to the tip on the head is provided with at least one ring of drawing light, the radius of the ring of drawing light is 1.5mm 0.5.

Preferably, a plurality of the light-pulling rings are connected end to end.

Preferably, the front end of the polishing ring closest to the end part of the head part is provided with a ring groove, and the radius of the ring groove is 2.5mm +/-0.5.

Preferably, the end of the head is provided with a 15-degree chamfer which is transited with the side surface of the head through a circular arc with the radius of 0.3 mm.

A cold heading mechanism with a punch comprises the punch, a lathe bed, a clamper, a copper sleeve, a heading die holder, a swing fork, a bracket, a mandril, an heading guide pillar and a slide block, wherein the clamper is fastened on the lathe bed, the copper sleeve is assembled in the clamper, the heading die holder is arranged in the copper sleeve and is connected with the copper sleeve in a sliding way,

the upsetting die comprises a die holder, a female die is arranged in the die holder, a punch is assembled in the female die and slides in the female die in a limiting manner, a pendulum fork is arranged behind the upsetting die holder and is connected with the upsetting die holder in a sliding manner through a ball sleeve, the middle of the pendulum fork is hinged to a support, the support is fixed on a sliding block, an upsetting guide pillar is fixedly assembled on the sliding block, a channel is arranged in the upsetting guide pillar, a spring is arranged in the channel, and an ejector rod is assembled in the channel and is abutted against the spring and the other end of the ejector rod is abutted against the rear end of the upsetting die holder.

Preferably, one end of the swinging fork is provided with a roller.

Preferably, the upper end of the swing fork is of a ball head structure, the ball sleeve is sleeved on the ball head structure, and the ball sleeve is vertically matched with the upsetting die holder in a sliding mode.

Compared with the prior art, the utility model discloses technical effect mainly embodies in following aspect:

1. regarding towards the stick, adopt the cambered surface transition when base portion, neck and head reduce the diameter gradually, can let the contact surface softer to set up at the tip and draw the light ring, draw the light ring and compare in ordinary polished rod structure, then when the cold-heading strikes, overcome the ripple, can form more smooth surface at the interior surface of product is explicated, through the ductility of metal, according to the bellied radius value that the ring that draws set for, can push flat the ripple.

2. The light-drawing ring structures are connected end to end, so that the flattening efficiency can be improved;

3. the service life of the punching rod is prolonged by the ring groove and the chamfer angle at the end part.

4. Regarding the cold heading mechanism, compared with the prior art, the punch rod is adopted for cold heading. In addition, the swing fork is structurally hinged to the support, and then the support is fixed on the sliding block, the sliding block moves in the movement process and pushes the upsetting die holder to move along with the punch rod, so that the work stability is not easily influenced by the vibration of a machine tool, and the cold upsetting precision is improved;

5. the number of cold heading processes for one hour is roughly 2700, and lathe finishing to form smooth inner walls is inefficient depending on product size, and generally varies from 30 to 60 workpieces.

Drawings

FIG. 1 is a drawing showing the processing dimensions of a punch main body according to an embodiment;

FIG. 2 is a schematic size view of a head in the embodiment;

fig. 3 is a schematic structural diagram of the cold heading mechanism in the embodiment.

Reference numerals are as follows: 1. a punch rod main body; 11. a base part; 12. a neck portion; 13. a head; 14. a cambered surface; 15. a light pulling ring; 16. a ring groove; 17. chamfering; 2. a bed body; 3. a holder; 4. a copper sleeve; 5. upsetting a die holder; 6. a pendulum fork; 7. a support; 8. a top rod; 9. upsetting the guide pillar; 10. a slider; 110. a female die; 120. a ball sleeve; 130. a channel; 140. a spring; 150. and a roller.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.

Example 1:

a punch comprising a punch body 1, with reference to the schematic drawings of the machined dimensions shown in figures 1 and 2, as an example, the various machined dimensions are illustrated, in mm. The core of the scheme lies in the shape and structure:

the punch main body 1 comprises a base part 11, a neck part 12 and a head part 13, wherein the neck part 12 and the base part 11 are transited through an arc surface 14, the diameter of the neck part 12 is smaller than that of the base part 11, the head part 13 and the neck part 12 are transited through the arc surface 14, and the diameter of the head part 13 is smaller than that of the base part 11. The side surface of the head part 13 close to the end part is provided with at least one light-drawing ring 15, and the radius of the light-drawing ring 15 is 1.5mm +/-0.5. The diameter of the base part 11 is 24mm, and the allowable error is 0.1mm. The neck 12 is 22.1mm in diameter with an allowable tolerance of 0.01mm. The diameter of the head 13 is 21.7mm. The remaining dimensions are not repeated one by one, since they are explicitly labeled in the drawings.

It is also known from fig. 1 that a plurality of pull rings 15 can be arranged end to end. The front end of the polishing ring 15 closest to the end part of the head part 13 is provided with a ring groove 16, and the radius of the ring groove 16 is 2.5mm +/-0.5. The end of the head 13 is provided with a 15 degree chamfer 17 which transitions with the side of the head 13 through an arc of radius 0.3 mm.

Regarding towards the stick, adopt cambered surface 14 transition when base portion 11, neck 12 and head 13 reduce the diameter gradually, can let the contact surface softer to set up at the tip and draw light ring 15, draw light ring 15 to compare in ordinary polished rod structure, then when cold-heading strikes, overcome the ripple, can form relatively smooth surface at the interior surface of product is obvious, through the ductility of metal, according to the bellied radius value that draw ring set for, can push flat the ripple. The structure of the light pulling ring 15 is connected end to end, so that the flattening efficiency can be improved. The service life of the punch rod is prolonged by the annular groove 16 and the chamfer 17 at the end part.

Example 2:

the punch main body 1 described above, i.e., the punch described below was used in combination with example 1.

A cold heading mechanism with a punch comprises the punch main body 1, a lathe bed 2, a clamp 3, a copper sleeve 4, a heading die holder 5, a swing fork 6, a bracket 7, an ejector rod 8, an upsetting guide pillar 9 and a slide block 10, and is shown in figure 3. The clamper 3 is fastened to the bed 2. The copper sleeve 4 is assembled in the holder 3, and the upsetting die holder 5 is arranged in the copper sleeve 4 and is in sliding connection with the copper sleeve 4.

A female die 110 is arranged in the upsetting die holder 5, a punch rod is assembled in the female die 110, and the punch rod main body 1 slides in the female die 110 in a limiting manner. The rear of the upsetting die holder 5 is provided with a pendulum fork 6, the pendulum fork 6 is connected with the upsetting die holder 5 in a sliding manner through a ball sleeve 120, the middle of the pendulum fork 6 is hinged on a support 7, the support 7 is fixed on a slide block 10, an upsetting guide pillar 9 is fixedly assembled on the slide block 10, a channel 130 is arranged in the upsetting guide pillar 9, a spring 140 is arranged in the channel 130, and the ejector rod 8 is assembled in the channel 130 and abutted against the spring 140, and the other end of the ejector rod is abutted against the rear end of the upsetting die holder 5. One end of the swing fork 6 is provided with a roller 150. The upper end of the swing fork 6 is of a ball head structure, the ball sleeve 120 is sleeved on the ball head structure, and the ball sleeve 120 is vertically matched with the upsetting die holder 5 in a sliding mode.

In fig. 3, the above scheme works as follows: an oil cylinder (not shown in the drawing) pushes the slide block 10 to move linearly from left to right, at this time, the slide block 10 and the upsetting guide pillar 9 are fixed and move synchronously to the right, and the rear end of the spring 140 is compressed, so that the initial position of the rear end of the spring 140 can be adjusted. The other end of the spring 140 is further arranged in the ejector rod 8, the upsetting guide column 9 is still after being adjusted in position, at the moment, the spring 140 accumulates elastic potential energy, the other end of the ejector rod 8 abuts against the end face of the upsetting die holder 5, the punch rod main body 1 is fixed in the upsetting die holder 5, then a crank or a cam (not shown in the drawing) is in contact with the roller 150, so that the swing rod swings, when the swing rod swings back and forth, the ball sleeve 120 can drive the upsetting die holder 5 to move back and forth in the copper sleeve 4 to realize impact, and the female die 110 in the upsetting die holder 5 is kept still in the scheme.

Therefore, in the improvement of the scheme, compared with the prior structure that the oil cylinder is directly used for driving the punch rod main body 1 to move back and forth in the upsetting die seat 5, the cold end machining effect of the workpiece in the female die 110 seat is different, the operation of the oscillating rod is utilized in the scheme, the vibration transmission is reduced, and the machining is more stable and reliable. The swing rod can be driven by a cam structure, the spring 140 enables the swing rod to reset, and the protruding part of the cam enables the spring 140 to compress, so that the swing rod swings around a hinge point in a small amplitude.

Of course, the above is only the typical example of the present invention, in addition, the present invention can also have other multiple specific embodiments, and all the technical solutions formed by adopting equivalent replacement or equivalent transformation all fall within the scope of the present invention.

Claims

1. The utility model provides a punching rod, includes punching rod main part (1), and punching rod main part (1) includes base portion (11), neck (12) and head (13), passes through cambered surface (14) transition between neck (12) and base portion (11), and neck (12) diameter is less than base portion (11) diameter, passes through cambered surface (14) transition between head (13) and neck (12), and head (13) diameter is less than base portion (11) diameter, characterized by: the side surface of the head (13) close to the end part is provided with at least one light pulling ring (15), and the radius of the light pulling ring (15) is 1.5mm +/-0.5.

2. The punch bar of claim 1, wherein: the ends of the plurality of light pulling rings (15) are connected.

3. The punch bar of claim 2, wherein: the front end of the polishing ring (15) closest to the end part of the head part (13) is provided with a ring groove (16), and the radius of the ring groove (16) is 2.5mm +/-0.5.

4. The plunger as claimed in claim 1, wherein: the end part of the head part (13) is provided with a 15-degree chamfer (17) which is in transition with the side surface of the head part (13) through an arc with the radius of 0.3 mm.

5. A cold heading mechanism with a punch rod, comprising the punch rod according to any one of claims 1 to 4, and further comprising a lathe bed (2), a clamper (3), a copper sleeve (4), an upsetting die holder (5), a swing fork (6), a bracket (7), a push rod (8), an upsetting guide pillar (9) and a slide block (10), and is characterized in that: the holder (3) is fastened on the lathe bed (2), the copper sleeve (4) is assembled in the holder (3), the upsetting die holder (5) is arranged in the copper sleeve (4) and is connected with the copper sleeve (4) in a sliding way,

set up bed die (110) in die holder (5), assemble towards excellent main part (1) in bed die (110), towards excellent main part (1) spacing slip in bed die (110), the rear of die holder (5) sets up pendulum fork (6), pendulum fork (6) slide through ball cover (120) and die holder (5) and are connected, the middle part of pendulum fork (6) articulates on support (7), support (7) are fixed on slider (10), fixed assembly has upsetting guide pillar (9) on slider (10), be provided with passageway (130) in upsetting guide pillar (9), be provided with spring (140) in passageway (130), ejector pin (8) assemble contradict with spring (140) in passageway (130) and the other end is contradicted on the rear end of die holder (5).

6. The cold heading mechanism with the punch as claimed in claim 5, wherein: one end of the swing fork (6) is provided with a roller (150).

7. The cold heading mechanism with the punch as claimed in claim 5, wherein: the upper end of the swing fork (6) is of a ball head structure, the ball sleeve (120) is sleeved on the ball head structure, and the ball sleeve (120) is vertically matched with the upsetting die holder (5) in a sliding mode.