High-efficiency cold drawing equipment for high-performance stainless steel pipe

Abstract

The utility model discloses high-efficiency cold-drawing equipment for a high-performance stainless steel pipe, which is characterized in that a lubricating mechanism is arranged on an outer die of a cold-drawing head, the lubricating mechanism consists of an outer ring body and an inner ring body arranged in the outer ring body, an oil inlet hole is formed in the outer ring body, through holes are densely distributed in the inner ring body, and a plurality of balls are arrayed between the outer ring body and the inner ring body; a sponge ring is fixed on the inner circumference of the inner ring body, sponge sleeves are further filled on two sides between the outer ring body and the inner ring body, a mounting groove is formed in a feeding cavity of the cold-drawing head outer die, the lubricating mechanism is limited in the mounting groove through a fixing sleeve, a lubricating oil injection channel corresponding to an oil inlet hole of the outer ring body is formed in the cold-drawing head outer die, and the lubricating oil injection channel is connected with the oil inlet hole. The cold-drawing head outer die can lubricate the whole outer wall of a steel pipe before the steel pipe enters a connecting cavity, ensures the lubricating effect and adapts to a rotary cold-drawing mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-efficiency cold-drawing equipment for high-performance stainless steel pipe. BACKGROUND

[0002] The patent with announcement number CN213378543U discloses a steel pipe cold-drawing head outer die, comprising an outer die body with a through cavity, the through cavity comprises a feeding cavity, a connecting cavity and a discharging cavity connected in sequence, the inner diameter of the feeding cavity is larger than that of the discharging cavity, the inner wall of the connecting cavity is smoothly connected to the feeding cavity and the discharging cavity, a lubricating groove is formed in the inner wall of the connecting cavity, a lubricating bag and a pressing assembly for applying pressure to the lubricating bag are installed in the lubricating groove.

[0003] This steel pipe cold-drawing head outer die has the following disadvantages: it can only lubricate the outer wall of the steel pipe linearly, but cannot lubricate the whole outer wall of the steel pipe; the rollers abutting against the outer wall of the steel pipe can only rotate along the axial direction of the steel pipe, but some steel pipe cold-drawing machines in the prior art adopt a rotary cold-drawing method when cold-drawing, at this time, the rollers may not rotate, resulting in the failure of the lubricating mechanism. SUMMARY

[0004] The utility model aims at overcoming the shortcomings of the prior art, providing a high-efficiency cold-drawing equipment for high-performance stainless steel pipe, which improves the cold-drawing head outer die, can lubricate the whole outer wall of the steel pipe before it enters the connecting cavity, ensures the lubricating effect, and is suitable for the rotary cold-drawing method.

[0005] The technical scheme of the utility model is as follows: a high-efficiency cold-drawing equipment for high-performance stainless steel pipe, comprising a cold-drawing head outer die, a lubricating mechanism is arranged on the cold-drawing head outer die, the lubricating mechanism is composed of an outer ring body and an inner ring body arranged in the outer ring body, an oil inlet hole is formed in the outer ring body, the inner ring body is densely provided with through holes, a plurality of balls are arranged in an array between the outer ring body and the inner ring body, a sponge ring is fixed to the inner periphery of the inner ring body, sponge sleeves are filled between the two sides of the outer ring body and the inner ring body.

[0006] An installation groove is arranged on the feeding cavity of the cold-drawing head outer die, and the lubricating mechanism is limited in the installation groove by a fixing sleeve.

[0007] A lubricating oil injection channel corresponding to the oil inlet hole of the outer ring body is arranged on the cold-drawing head outer die, and the lubricating oil injection channel is connected with the oil inlet hole.

[0008] Specifically, the lubricating mechanism is arranged close to the connecting cavity in the cold-drawing head outer die.

[0009] Further, a positioning convex point is arranged at the inner end of the installation groove, and a positioning concave hole corresponding to the positioning convex point is arranged on the outer ring body.

[0010] Further, the mounting groove inner end and outer ring body are further provided with a gasket ring, and the gasket ring is provided with a first avoiding slot corresponding to the inner ring body and the sponge ring.

[0011] Further, the fixing sleeve is further provided with a second avoiding slot corresponding to the inner ring body and the sponge ring at one end of the outer ring body.

[0012] Further, the lubricating oil injection channel is further provided with an oil storage tank on the outer die of the cold-drawing head, the oil storage tank is connected with a lubricating oil storage tank through a pump body, and the lubricating oil injection channel is further filled with a cotton core.

[0013] Specifically, the fixing sleeve and the feeding cavity are coaxially arranged and the inner diameters of the fixing sleeve and the feeding cavity are consistent, and the inner periphery of the sponge sleeve is flush with the inner walls of the fixing sleeve and the feeding cavity.

[0014] Further, the outer periphery of the fixing sleeve is provided with a protruding ring, the outer end of the feeding cavity is provided with a step corresponding to the protruding ring, and the protruding ring is matched with the step after the fixing sleeve is inserted into the mounting groove.

[0015] Further, the cold-drawing head outer die and the fixing sleeve are provided with a plurality of pairs of screw holes corresponding to each other, and the cold-drawing head outer die and the fixing sleeve are connected through a plurality of fixing bolts.

[0016] Further, the mounting groove is further provided with a guide groove, and the outer side of the fixing sleeve is provided with a guide protruding strip corresponding to the guide groove.

[0017] The utility model discloses a lubricating mechanism, which is arranged in the feeding cavity close to the connecting cavity, and the inner ring body and the sponge ring fixed in the inner ring body can rotate with the steel pipe for cold-drawing. When the steel pipe rotates through the feeding cavity, the sponge ring applies lubricating oil to the outer wall of the steel pipe, thereby reducing the friction between the steel pipe and the cold-drawing head outer die. The lubricating oil enters the outer ring through the oil inlet hole, enters the sponge ring through the through hole in the inner ring body, and is temporarily stored in the sponge sleeves on both sides, thereby maintaining the continuity of oil supply. In addition, the above structure has the advantages of convenient assembly. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a sectional view of the utility model;

[0019] Figure 2 is Figure 1 an enlarged view of part A in the utility model;

[0020] Figure 3 is a structure schematic view of the lubricating mechanism in the utility model.

[0021] In the figure: cold-drawing head outer die 1, outer ring body 2, inner ring body 3, oil inlet hole 4, through hole 5, ball 6, sponge ring 7, sponge sleeve 8, fixing sleeve 9, lubricating oil injection channel 10, positioning convex point 11, gasket ring 12, first avoiding slot 13, second avoiding slot 14, oil storage hopper 15, convex ring 16, fixing bolt 17, feeding cavity 18, connecting cavity 19. DETAILED DESCRIPTION

[0022] The technical scheme of the utility model will be further specifically explained below by taking examples and in combination with the drawings.

[0023] In combination with Figures 1-3 the figure, the high-efficiency cold-drawing equipment for high-performance stainless steel pipes comprises a cold-drawing head outer die 1, and a lubricating mechanism is arranged on the cold-drawing head outer die 1.

[0024] The lubricating mechanism is composed of an outer ring body 2 and an inner ring body 3 arranged in the outer ring body 2, the outer ring body 2 is provided with an oil inlet hole 4, the inner ring body 3 is densely provided with through holes 5, a plurality of balls 6 are arranged in an array between the outer ring body 2 and the inner ring body 3, a sponge ring 7 is fixed to the inner periphery of the inner ring body 3, and sponge sleeves 8 are filled between the two sides of the outer ring body 2 and the inner ring body 3.

[0025] The feeding cavity 18 of the cold-drawing head outer die 1 is provided with a mounting groove, and the lubricating mechanism is limited in the mounting groove through a fixing sleeve 9, so as to facilitate assembly of the lubricating mechanism.

[0026] The cold-drawing head outer die 1 is provided with a lubricating oil injection channel 10 corresponding to the oil inlet hole 4 of the outer ring body 2, and the lubricating oil injection channel 10 is connected with the oil inlet hole 4.

[0027] In the above structure, the lubricating mechanism is arranged in the feeding cavity 18 close to the connecting cavity 19, the inner ring body 3 and the sponge ring 7 fixed in the inner ring body 3 can rotate with the steel pipe being cold-drawn, when the steel pipe rotates through the feeding cavity 18, the sponge ring 7 will smear lubricating oil on the outer wall of the steel pipe, so as to reduce friction between the steel pipe and the cold-drawing head outer die 1; since the lubricating oil enters the outer ring through the oil inlet hole 4, and then enters the sponge ring 7 through the through holes 5 on the inner ring body 3, the excess lubricating oil is temporarily stored in the sponge sleeves 8 on the two sides, so as to maintain the continuity of oil supply; in addition, the above structure also has the advantage of facilitating assembly.

[0028] In another embodiment, as Figure 1 shown, the lubricating mechanism is arranged close to the connecting cavity 19 in the cold-drawing head outer die 1, so that the steel pipe is lubricated when it is formally cold-drawn.

[0029] In another embodiment, as Figure 2As shown, the inner end of the mounting groove is provided with a positioning protrusion 11, and the outer ring body 2 is provided with a positioning recess hole corresponding to the positioning protrusion 11, so that the oil inlet hole 4 on the outer ring body 2 is positioned with the lubricating oil injection channel 10.

[0030] In another embodiment, in combination with Figure 1 and Figure 2 As shown, the inner end of the mounting groove and the outer ring body 2 are further provided with a grommet 12, which has a first avoidance slot 13 corresponding to the inner ring body 3 and the sponge ring 7, so as to avoid affecting the rotation of the inner ring body 3 and the sponge sleeve 8.

[0031] In another embodiment, in combination with Figure 1 and Figure 2 As shown, the end of the fixed sleeve 9 towards the outer ring body 2 is further provided with a second avoidance slot 14 corresponding to the inner ring body 3 and the sponge ring 7, so as to avoid affecting the rotation of the inner ring body 3 and the sponge sleeve 8.

[0032] It should be noted that the first avoidance slot 13 and the second avoidance slot 14 also have a certain oil storage function, and can temporarily store excess lubricating oil in the two groove bodies.

[0033] In another embodiment, in combination with Figure 1 and Figure 2 As shown, the outer end of the lubricating oil injection channel 10 is further provided with an oil storage tank 15 on the cold-drawing head outer die 1, the oil storage tank 15 is connected to a lubricating oil storage tank through a pump body, and the lubricating oil injection channel 10 is further filled with a cotton core to avoid too fast lubricating oil discharge speed.

[0034] In another embodiment, as Figure 1 shown, the fixed sleeve 9 and the feeding cavity 18 are coaxially arranged and the inner diameters of the two are consistent, and the inner periphery of the sponge sleeve 8 is flush with the inner walls of the fixed sleeve 9 and the feeding cavity 18. When the steel pipe passes through, the sponge sleeve 8 can uniformly apply lubricating oil to the outer wall of the steel pipe.

[0035] In another embodiment, as Figure 1 shown, the outer periphery of the fixed sleeve 9 has a ring of protrusions 16, and the outer end of the feeding cavity 18 is provided with a step corresponding to the protrusions 16. After the fixed sleeve 9 is inserted into the mounting groove, the protrusions 16 match the step. When the positioning protrusion 11 and the positioning recess hole do not match accurately, the protrusions 16 and the step cannot be combined smoothly, prompting inaccurate installation.

[0036] In another embodiment, as Figure 1 shown, the cold-drawing head outer die 1 and the fixed sleeve 9 are provided with a plurality of pairs of screw holes corresponding to each other, and the cold-drawing head outer die 1 and the fixed sleeve 9 are connected through a plurality of fixed bolts 17.

[0037] In another embodiment, a guide groove is further arranged in the mounting groove, and a guide protrusion corresponding to the guide groove is arranged outside the fixing sleeve 9, so as to facilitate the mutual positioning of the multiple pairs of screw holes.

Claims

1. A high efficiency cold-drawing apparatus for high performance stainless steel pipes, comprising a cold-drawing head outer die (1) provided with a lubricating mechanism, characterized in that, The lubricating mechanism is composed of an outer ring body (2) and an inner ring body (3) arranged in the outer ring body (2), the outer ring body (2) is provided with an oil inlet hole (4), the inner ring body (3) is densely provided with through holes (5), a plurality of balls (6) are arranged in an array between the outer ring body (2) and the inner ring body (3), a sponge ring (7) is fixed to the inner periphery of the inner ring body (3), sponge sleeves (8) are filled on both sides between the outer ring body (2) and the inner ring body (3). The lubricating mechanism is limited in the mounting groove by a fixing sleeve (9). The outer ring body (2) is provided with a lubricating oil injection channel (10) corresponding to the oil inlet hole (4).

2. The high efficiency cold-drawing apparatus for high performance stainless steel pipes according to claim 1, wherein The lubricating mechanism is arranged close to the connecting cavity (19) in the cold heading outer die (1).

3. The high efficiency cold-drawing apparatus for high performance stainless steel pipes according to claim 2, wherein the plurality of dies are arranged in the drawing die assembly in a manner that the diameter of the hole of the die is gradually reduced from the first die to the last die. The inner end of the mounting groove is provided with a positioning convex point (11), and the outer ring body (2) is provided with a positioning recess hole corresponding to the positioning convex point (11).

4. The high efficiency cold-drawing apparatus for high performance stainless steel pipes according to claim 3, wherein the plurality of dies are arranged in the drawing die assembly in a manner that the diameter of the hole of the die is gradually reduced from the first die to the last die. The mounting groove is also provided with a spacer ring (12) between the inner end and the outer ring body (2), and the spacer ring (12) has a first avoiding groove (13) corresponding to the inner ring body (3) and the sponge ring (7).

5. The high efficiency cold-drawing apparatus for high performance stainless steel pipes according to claim 4, wherein the plurality of dies are arranged in the drawing die assembly in a manner that the diameter of the hole of the die is gradually reduced from the first die to the last die. The end of the fixing sleeve (9) towards the outer ring body (2) is also provided with a second avoiding groove (14) corresponding to the inner ring body (3) and the sponge ring (7).

6. The high efficiency cold-drawing apparatus for high performance stainless steel pipes as set forth in claim 5, characterized by The cold heading outer die (1) is also provided with an oil storage tank (15) at the outer end of the lubricating oil injection channel (10), the oil storage tank (15) is connected to a lubricating oil storage tank through a pump body, and the lubricating oil injection channel (10) is also filled with a cotton core.

7. The high efficiency cold-drawing apparatus for high performance stainless steel pipes as set forth in claim 6, characterized by The fixing sleeve (9) and the feed cavity (18) are coaxially arranged and have consistent inner diameters, and the inner periphery of the sponge sleeve (8) is flush with the inner walls of the fixing sleeve (9) and the feed cavity (18).

8. The high efficiency cold-drawing apparatus for high performance stainless steel pipes as set forth in claim 7, wherein The outer periphery of the fixing sleeve (9) has a ring of convex rings (16), the outer end of the feed cavity (18) is provided with a step corresponding to the convex rings (16), and the convex rings (16) are matched with the step after the fixing sleeve (9) is inserted into the mounting groove.

9. The high efficiency cold-drawing apparatus for high performance stainless steel pipes as recited in claim 8, wherein The cold heading outer die (1) and the fixing sleeve (9) are provided with a plurality of pairs of screw holes corresponding to each other, and the cold heading outer die (1) and the fixing sleeve (9) are connected by a plurality of fixing bolts (17).

10. The high-efficiency cold drawing equipment for high-performance stainless steel pipes as described in claim 9, characterized in that, The mounting groove is also provided with a guide groove, and the outer side of the fixing sleeve (9) is provided with a guide convex strip corresponding to the guide groove.

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