CN205183358U

CN205183358U - Toper channels into tube drawing mould

Info

Publication number: CN205183358U
Application number: CN201520828930.6U
Authority: CN
Inventors: 韩波; 周金苗
Original assignee: JIANGSU HUACHENG INDUSTRY PIPE MAKING Co Ltd
Current assignee: JIANGSU HUACHENG INDUSTRY PIPE MAKING Co Ltd
Priority date: 2015-10-14
Filing date: 2015-10-23
Publication date: 2016-04-27
Anticipated expiration: 2025-10-23
Also published as: CN105290129A

Abstract

The utility model discloses a toper channels into tube drawing mould that the relevant parameter of entrance all can quantify, include: the tube drawing calligraphy or painting model body, set up on the tube drawing calligraphy or painting model body run through the tube drawing calligraphy or painting model body draw the shaping hole, draw the shaping hole and include entrance and sizing section, sizing duan weiyu round -shaped metal tube's the corresponding cylinder hole of external diameter, tubular metal resonator external diameter behind its diameter d1= draw, the outside open toper entrance hole that links up mutually for cylinder hole with the sizing section of entrance, its outside suits along the diameter d2 of circular arc line and the external diameter of the preceding pipe of draw, the tapering angle (img file='DDA0000828615480000011. TIF'wi='751'he='126' /) of this toper entrance hole wherein, F0 is the external surface area before the draw, F1 showes the external surface area behind the draw, the length (img file='DDA0000828615480000012. TIF'wi='302'he='125' /) of entrance the utility model discloses mainly used is with the round -shaped metal tube undergauge.

Description

A kind of taper imports welding bell

Technical field

The drawing that the utility model relates in Metal Forming technical field is shaping, refers more particularly to the welding bell of circular pipe undergauge.

Background technology

Important fixture component when drawing mould is cold-drawn various metal tube, be widely used in the metal pipe material reducings such as steel pipe or/and distortion production process in.Utilize drawing die to carry out cold drawn forming to steel pipe, have that stock utilization is high, energy consumption is low, properties of product are excellent, production efficiency is high and the feature such as with low cost.In drawing mould, the tubing cross sectional shape shaping by its drawing is different, can be divided into circular drawing mould and special-shaped drawing mould; Have linerless core by its drawing process, can be divided into again empty sinking drawing die (being called for short empty sinking mould) and lining core drawing die (being called for short lining core), lining core drawing die is matched by external mold and internal mold and jointly completes cold-drawn.In drawing industry, the external mold of empty sinking drawing die or lining core drawing die is referred to as drawing die (or being welding bell) usually.

As everyone knows, if the length of the openings of sizes of welding bell and entrance arranges unreasonable, contact area so between tubing and mould changes thereupon, there is unbalanced phenomena in the vertical and horizontal flowing of metal, thus it is second-rate to cause through the shaping round tube of its drawing, be mainly manifested in its linearity poor (exist bend in various degree), wall unevenness is even, fillet is unbalanced, size is unstable and the defect such as surface irregularity, occurs steel pipe fracture and cracking phenomena in drawing process what is more.

At present; for the design standard that welding bell is also ununified; it is all by rule of thumb that the openings of sizes of its entrance and the length of entrance are arranged; for the round tube of each model; when designing, all through repeated multiple times test, improvement, the process tested again, just ideal drawing die to can be obtained; this not only extends the process-cycle of mould, also add production cost.

Utility model content

Technical problem to be solved in the utility model is: provide all quantifiable taper of a kind of relevant parameter of its entrance to import welding bell.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of taper imports welding bell, comprise: welding bell body, this welding bell body offers run through welding bell body be drawn into nibs, be drawn into nibs and comprise entrance and sizing section;

Described sizing section is the cylindrical hole corresponding with the external diameter of round metal tube after draw, its diameter d ₁metal tube external diameter after=draw;

Described entrance is the outwardly taper entrance hole be connected mutually with the cylindrical hole of sizing section, the diameter d of its outer edge circular arc line ₂adapt with the external diameter of pipe before draw, the taper angle of this taper entrance hole wherein, F ₀for the external surface area before draw, F1 represents the external surface area after draw; The length of entrance

As a kind of preferred version, import in welding bell in described taper, the diameter d of the outer edge circular arc line of described taper introduction hole ₂larger than the external diameter of pipe before draw 3 ~ 4 millimeters.

As a kind of preferred version, import in welding bell in described taper, the nibs that is drawn into of described welding bell body has outlet section in the arranged outside of sizing section, and this outlet section is outwardly bellmouth.

As a kind of preferred version, import in welding bell in described taper, the taper angle β of described outlet section is between 30 ~ 45 degree.

As a kind of preferred version, import in welding bell in described taper, the length c of described outlet section accounts for and is wholely drawn into 5.5 ~ 6.5% of nibs length.

As a kind of preferred version, import in welding bell in described taper, the profile of described welding bell body is round table-like, its small end end face diameter d ₃>=2d ₁.

As a kind of preferred version, import in welding bell in described taper, 1.5 times of the metal tube wall thickness after the length a >=draw of described sizing section.

As a kind of preferred version, import in welding bell in described taper, the pipe external diameter before the height H >=draw of described welding bell body.

The beneficial effects of the utility model are: welding bell described in the utility model, the relevant parameter of its entrance can quantize, thus make its designing and making all very simple, so just greatly reduce the process-cycle, save production cost, and the tubing glacing flatness shaping through its draw is high, smooth outer surface, outer-diameter accuracy stable.In addition, the utility model, also by being arranged to round table-like by its profile, making the easy centering in the position of welding bell during tube drawing, substantially increasing production efficiency.

Accompanying drawing explanation

Fig. 1 is the sectional structure schematic diagram that taper described in the utility model imports welding bell.

Reference numeral in figure is: 2, welding bell body, I, entrance, II, sizing section, III, outlet section.

Detailed description of the invention

Below in conjunction with accompanying drawing, describe a kind of specific embodiments taper of metal circular tube undergauge being imported welding bell described in the utility model in detail.

As shown in Figure 1, described in the utility model kind of taper imports welding bell, comprising: profile is the welding bell body 2 of truncated cone-shaped, and the tapering between its large and small end is usually at about 5 degree, and the height H of welding bell body 2 is equivalent to the pipe external diameter before draw; This welding bell body 2 offers run through welding bell body be drawn into nibs, this is drawn into nibs and comprises the entrance I, sizing section II and the outlet section III that are connected mutually successively; Described sizing section II be shaping with draw after the corresponding cylindrical hole of the external diameter of round metal tube, its diameter d ₁metal tube external diameter after=draw, the length a of this sizing section II is equivalent to 1.5 times of the metal tube wall thickness after draw; Described entrance I is the outwardly taper entrance hole be connected mutually with the cylindrical hole of sizing section II, the diameter d of its outer edge circular arc line ₂adapt with the external diameter of pipe before draw, under normal circumstances, the diameter d of the outer edge circular arc line of taper entrance hole ₂larger than the external diameter of pipe before draw 3 ~ 4 millimeters, the taper angle of described taper entrance hole wherein, F ₀for the external surface area of pipe before the external surface area before draw and draw, F ₁represent the external surface area of the external surface area after draw and the round metal tube after draw; The length of entrance I work as k ₁when=35, the taper angle of described taper entrance hole is best; Described outlet section III is outwardly bellmouth, its taper angle β is between 30 ~ 45 degree, and the length c of outlet section III accounts for and is wholely drawn into 5.5 ~ 6.5% of nibs length, in the present embodiment, in order to ensure the intensity of described welding bell body 2, the small end end face diameter d of welding bell body 2 ₃>=2d ₁.

In sum, be only preferred embodiment of the present utility model, not be used for limit the utility model implement scope, all equalizations done according to shape, structure, feature and the spirit described in the utility model right change and modify, and all should be included in right of the present utility model.

Claims

1. taper imports a welding bell, comprising: welding bell body, is characterized in that: described welding bell body offers run through welding bell body be drawn into nibs, this is drawn into nibs and comprises: entrance and sizing section;

Described entrance is the outwardly taper entrance hole be connected mutually with the cylindrical hole of sizing section, the diameter d of its outer edge circular arc line ₂adapt with the external diameter of pipe before draw, the taper angle of this taper entrance hole 33<k ₁<37, wherein, F ₀for the external surface area before draw, F1 represents the external surface area after draw; The length of entrance

2. taper according to claim 1 imports welding bell, it is characterized in that: the diameter d of the outer edge circular arc line of described taper introduction hole ₂larger than the external diameter of pipe before draw 3 ~ 4 millimeters.

3. taper according to claim 2 imports welding bell, it is characterized in that: the nibs that is drawn into of described welding bell body has outlet section in the arranged outside of sizing section, and this outlet section is outwardly bellmouth.

4. taper according to claim 3 imports welding bell, it is characterized in that: the taper angle β of described outlet section is between 30 ~ 45 degree.

5. taper according to claim 3 imports welding bell, it is characterized in that: the length c of described outlet section accounts for and is wholely drawn into 5.5 ~ 6.5% of nibs length.

6. taper according to claim 1 imports welding bell, it is characterized in that: the profile of described welding bell body is round table-like, its small end end face diameter d ₃>=2d ₁.

7. taper according to claim 1 imports welding bell, it is characterized in that: 1.5 times of the metal tube wall thickness after the length a >=draw of described sizing section.

8. import welding bell according to the taper one of claim 1 to 7 Suo Shu, it is characterized in that: the pipe external diameter before the height H >=draw of described welding bell body.