CN210333798U - Drawing die - Google Patents

Abstract

The utility model relates to a drawing die, its characterized in that: including hollow cun cover, draw head and cover with the cavity that cun cover one end is connected establish the ejector pin in cun cover and drawing head, circumference is equipped with a plurality of through-holes that the diameter is greater than drawing head wall thickness on the free end lateral wall of drawing head, be equipped with diameter and through-hole assorted steel ball in the through-hole, through-hole outer end diameter is less than the steel ball diameter, the ejector pin is located the spacing section and the next-door neighbour's top of drawing head and holds the section, the diameter of spacing section is less than the diameter of holding the section in the top, when promoting the ejector pin to drawing head direction, the section lateral wall is held in the top offsets with the steel ball and makes the steel ball expose from the through-hole. Through the utility model discloses a drawing die draws the pore wall of tubular product drilling, can increase welding position's thickness, improves welding strength.

Description

Drawing die

Technical Field

The utility model relates to a drawing equipment field, concretely relates to drawing die.

Background

The metal pipe sometimes needs to weld the branch pipe after drilling on the pipe wall in the using process, in the prior art, the pipe needing to be welded is directly drilled on the pipe wall of the pipe by adopting a manual drilling jig, one end of the pipe is welded at the drilling position, the hole wall is turned inwards, burrs are large, the pipe is not easy to remove and is easy to block, the welding position of the drilling hole is only provided with one pipe wall thickness for welding positioning, the welding strength is insufficient, the problems of easy deformation or incomplete appearance and the like are solved, the disadvantages are brought to subsequent shaping, sealing detection and the like, and the reject ratio is large.

Therefore, there is a need to provide a drawing die for drawing a hole wall after drilling, so as to solve the above-mentioned deficiencies in the prior art.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a drawing die that draws is carried out to the pore wall of tubular product pipe wall drilling.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a drawing die, characterized in that: including hollow cun cover, draw head and cover with the cavity that cun cover one end is connected establish the ejector pin in cun cover and drawing head, circumference is equipped with a plurality of through-holes that the diameter is greater than drawing head wall thickness on the free end lateral wall of drawing head, be equipped with diameter and through-hole assorted steel ball in the through-hole, through-hole outer end diameter is less than the steel ball diameter, the ejector pin is located the spacing section and the next-door neighbour's top of drawing head and holds the section, the diameter of spacing section is less than the diameter of holding the section in the top, when promoting the ejector pin to drawing head direction, the section lateral wall is held in the top offsets with the steel ball and makes the steel ball expose from the through-hole.

Furthermore, a limiting ring is formed on the inner wall of the end part of the free end of the drawing head, and the inner diameter of the limiting ring is equivalent to the diameter of the limiting section. By adopting the design, the pipe can be prevented from being damaged by the excessive ejection of the ejector rod towards the drawing head.

Furthermore, the connection surface of the limiting section and the jacking section is an inclined surface. Therefore, the push rod can be conveniently and smoothly pushed towards the drawing head.

Further, the diameter of the jacking section is equivalent to the diameter of the inner wall of the drawing head. Therefore, the ejector rod can be prevented from shaking in the drawing process to influence the drawing quality.

Furthermore, the other end of cun cover is connected with the end cover, the end that corresponds of ejector pin passes the end cover and extends outside the end cover, the part that the ejector pin is arranged in cun cover is formed with the spacing boss that can with the end cover butt. Through setting up the boss, can prevent to make the steel ball drop to drawing in the head inner chamber towards the excessive ejector pin of pulling of end cover direction.

Furthermore, the number of the through holes is three and is uniformly arranged in the circumferential direction of the drawing head.

Furthermore, the drawing head is fixedly connected with the inch sleeve through threads.

Further, the end cover is fixedly connected with the inch sleeve through threads.

Compared with the prior art, the utility model has the advantages of it is following: the steel ball is arranged in the drawing head, the steel ball is ejected out of the side wall of the drawing head through the ejector rod, and then the drawing head continuously rotates in the drawing process, so that the hole wall of the drilled hole of the pipe can be drawn and protruded out of the outer wall of the pipe, the thickness of the connecting position during welding is increased, the welding strength is increased, and the qualified rate of pipe welding is improved; the utility model discloses a drawing die structure is very simple, and is with low costs, in the use, drilling and drawing process can automatic switch-over, and production efficiency is high.

Drawings

Fig. 1 is a schematic structural view of a drawing die according to a preferred embodiment of the present invention.

Fig. 2 is a schematic diagram of the drawing die explosion structure according to a preferred embodiment of the present invention.

Fig. 3 is a schematic sectional view of a drawing die according to a preferred embodiment of the present invention.

Fig. 4 is a schematic structural view of the middle tube during drilling.

Fig. 5 is a schematic structural view of the hole wall of the drilled pipe in the present invention during drawing.

Fig. 6 is the structure schematic diagram of the pipe drilling after the completion of the drawing.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the terms of orientation and positional relationship indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of protection of the present invention.

As shown in fig. 1 to 3, the utility model discloses a preferred embodiment structure schematic diagram, as shown in the figure, this kind of drawing die includes hollow cun cover 1, the cavity that is connected with cun cover 1 one end is drawn first 2 and the cover is established at cun cover 1 and is drawn ejector pin 3 in first 2, the free end lateral wall circumference of drawing head 2 is equipped with a plurality of through-holes 21 that the diameter is greater than drawing head wall thickness, be equipped with diameter and through-hole 21 assorted steel ball 22 in the through-hole 21, through-hole 21 outer end diameter is less than steel ball 22 diameter, the part that ejector pin 3 is located drawing head includes the spacing section 31 of tip and the section 32 of holding near spacing section 31, the diameter of spacing section 31 is less than the diameter of holding section 32, when pushing away ejector pin 3 to drawing head 2 direction, holding section lateral wall 32 offsets with steel ball 22 and makes steel ball 22 expose from through-hole 21. When the drawing is not carried out, the steel ball is limited between the side wall of the limiting section 31 and the outer end of the through hole 21, and the steel ball 22 cannot roll out of the through hole 21 nor fall into the inner cavity of the drawing head 2; when drawing, the push rod 3 is pushed towards the drawing head 2, and the side wall of the propping section 32 is abutted against the steel ball 22 so that the steel ball is exposed out of the through hole 21 for drawing.

Preferably, in order to facilitate the push rod 3 to move smoothly towards the drawing head 2 to push the steel ball 22 to expose the through hole 21, the connecting surface between the limiting section 31 and the pushing section 32 is an inclined surface, and of course, is configured as a cambered surface to push the steel ball 22 smoothly.

In this embodiment, the number of the through holes 21 is three and is uniformly arranged in the circumferential direction of the drawing head 2.

In this embodiment, the diameter of the supporting section 32 is equivalent to the diameter of the inner wall of the corresponding position of the drawing head 2. Therefore, the ejector rod can be prevented from shaking in the drawing process to influence the drawing quality.

In this embodiment, a limiting ring 23 is formed on the inner wall of the free end of the drawing head 2, and the inner diameter of the limiting ring 23 is equal to the diameter of the end of the corresponding end of the mandril 2. By adopting the design, the pipe can be prevented from being damaged by the excessive ejection of the ejector rod towards the drawing head.

In this embodiment, the other end of cun cover 1 is connected with end cover 4, the end that corresponds of ejector pin 2 passes end cover 4 and extends to outside end cover 4, the part that ejector pin 3 is arranged in cun cover 1 is formed with spacing boss 33 that can with end cover 4 butt. By arranging the limiting boss 33, the ejector rod 3 can be prevented from being excessively pulled towards the end cover 4, so that the steel balls 22 can be prevented from falling into the inner cavity of the drawing head 2.

It should be mentioned that the end cap 4 of the drawing die is connected to a drawing machine (the drawing machine is not shown in the figure in the embodiment), after the drawing head 2 is placed in the drilled hole of the pipe, the drawing machine pushes the ejector rod 3 to move towards the drawing head 2 so as to expose the steel ball 22 from the through hole 21, and then the drawing die is driven by the drawing machine to rotate circumferentially and draw outwards to draw the drilled hole of the pipe.

In this embodiment, drawing head 2 connects fixedly with 1 threaded connection of cun cover, end cover 4 is fixed with 1 threaded connection of cun cover, and cun cover 1 passes through threaded connection with drawing head 2 and end cover 4, and the dismouting is very convenient.

As figure 4 to 5 for the drilling and the structure sketch map when drawing, adopt the utility model discloses the process of drawing is carried out to tubular product drilling as follows:

fix tubular product 500 on mounting fixture 600 earlier, the adjustment machine is aimed at tubular product 500's preset position with drill bit 700 and is drilled according to drawing the size, after the drilling was accomplished, machine automatic switch-over aims at the drawing die drilling, and stretch into in the drilling with the drawing die, operation drawbench ejector pin 3 makes steel ball 22 expose through-hole 21, start the drawbench and make the drawing die constantly the rotation in a circumferential direction and outwards draw, through the rotatory extrusion of drawing head 2 and drawing head 2 outwards draw the effect, make tubular product 500's drilling pore wall outwards bulge, as shown in fig. 6, thereby increase welding position thickness, with improve welding strength, except this, the utility model discloses a drawing die drills and draws, degree of automation is high, is favorable to improving production efficiency.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. A drawing die, characterized in that: including hollow cun cover, draw head and cover with the cavity that cun cover one end is connected establish the ejector pin in cun cover and drawing head, circumference is equipped with a plurality of through-holes that the diameter is greater than drawing head wall thickness on the free end lateral wall of drawing head, be equipped with diameter and through-hole assorted steel ball in the through-hole, through-hole outer end diameter is less than the steel ball diameter, the ejector pin lies in the spacing section and the next-door neighbour's of tip of drawing head and holds the section, the diameter of spacing section is less than the diameter that the section was held in the top, when promoting the ejector pin to drawing head direction, the section lateral wall is held in the top offsets with the steel ball and makes the steel ball expose from the through-hole.

2. The drawing die of claim 1, wherein: and a limiting ring is formed on the inner wall of the end part of the free end of the drawing head, and the inner diameter of the limiting ring is equivalent to the diameter of the limiting section.

3. The drawing die of claim 2, wherein: the connection surface of the limiting section and the jacking section is an inclined surface.

4. The drawing die of claim 3, wherein: the diameter of the jacking section is equivalent to the diameter of the inner wall of the drawing head.

5. The drawing die of claim 1, wherein: the other end of cun cover is connected with the end cover, the end that corresponds of ejector pin passes the end cover and extends outside the end cover, the part that the ejector pin is arranged in cun cover is formed with the spacing boss that can with the end cover butt.

6. The drawing die of claim 1, wherein: the number of the through holes is three and is uniformly arranged in the circumferential direction of the drawing head.

7. The drawing die of claim 5, wherein: the drawing head is fixedly connected with the inch sleeve through threads.

8. The drawing die of claim 7, wherein: the end cover is fixedly connected with the inch sleeve through threads.

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