Pickling-free lubrication die box for wire drawing machine

Abstract

The utility model relates to a pickling-free lubrication die box for a wire drawing machine, which comprises a box body and a drawing die, an inner cavity of the box body is divided into a powder feeding area and a cooling area by a partition plate, the drawing die is fixedly mounted on the partition plate, two ends of the drawing die respectively extend into the powder feeding area and the cooling area, and the pickling-free lubrication die box further comprises a powder pressing pipe. The powder pressing pipe is rotatably arranged in the powder feeding area, one end of the powder pressing pipe extends out of the box body, the other end of the powder pressing pipe is communicated with the adjacent end of the drawing die, and a plurality of negative lines and positive lines are formed on the inner wall of the end, close to the drawing die, of the powder pressing pipe. According to the steel wire drawing device, due to the arrangement of the powder pressing pipe, when a steel wire penetrates through the drawing die to be drawn, the surface of the steel wire can be coated with drawing lubricating powder in advance, and the drawing lubricating powder can be well extruded and attached to the steel wire, so that the lubricating effect during steel wire drawing is improved, and the quality problems of strain, galling and the like of the steel wire are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wire drawing, in particular to a pickling-free lubricating die box for a wire drawing machine. Background Technique

[0002] The wire drawing process in the finishing drawing process of spring steel wire has a great influence on the product performance. Generally, a relatively large total reduction rate (see area reduction rate) of about 90% and a relatively small pass reduction rate (about 10%-20%) are adopted to ensure the toughness of the product. For high-strength spring steel wire, it is necessary to control the outlet temperature of the wire in each pass below 150°C during wire drawing to prevent the wire from twisting cracks due to strain aging, which is the main defect causing wire scrap. Therefore, good lubrication and sufficient cooling must be provided during wire drawing.

[0003] During the use of the existing pickling-free lubricating die box for a wire drawing machine, when the wire enters the wire drawing die, since its surface is very smooth, the wire drawing lubricating powder is not easily attached to it, resulting in poor lubrication effect when the wire enters the wire drawing die, and it is easy to cause wire drawing and wire hairing. In severe cases, the wire can even be broken. And the wire drawing and wire hairing wires will cause greater quality problems in the subsequent processing procedures, increasing the scrap rate. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The utility model provides a pickling-free lubricating die box for a wire drawing machine, which solves the problems that due to the very smooth surface of the wire, the wire drawing lubricating powder is not easily attached to it, resulting in poor lubrication effect when the wire enters the wire drawing die and easy wire drawing and wire hairing.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: A pickling-free lubricating die box for a wire drawing machine, including a box body and a wire drawing die. The inner cavity of the box body is separated by a partition to form a powder feeding area and a cooling area. The wire drawing die is installed and fixed on the partition, and both ends of the wire drawing die extend into the powder feeding area and the cooling area respectively. It also includes a powder pressing pipe, which is rotatably arranged in the powder feeding area, and one end of the powder pressing pipe extends out of the box body. The other end of the powder pressing pipe is communicated with the adjacent end of the wire drawing die. A plurality of concave and convex lines and ridges are formed on the inner wall of the powder pressing pipe near the wire drawing die, and a plurality of powder feeding holes are formed on the inner wall of the powder pressing pipe far from the wire drawing die and are uniformly distributed along the radial direction of the powder pressing pipe, and the powder feeding holes penetrate through the outer wall of the powder pressing pipe.

[0008] Preferably, the plurality of concave and convex lines and ridges are spirally distributed on the inner wall of the powder pressing pipe.

[0009] It is further preferred that the acid-free lubricating mold box for the wire drawing machine also includes a transmission assembly, which is installed on the outside of the box body, and is connected to one end of the compressed powder tube extending to the outside of the box body, and the transmission assembly is used to drive the rotation of the compressed powder tube.

[0010] It is further preferred that the acid-free lubricating die box for the wire drawing machine also includes a cooling jacket and two connecting tubes, wherein the cooling jacket is arranged on the outside of one end of the drawing die located in the cooling zone, the cooling jacket is welded and fixed on the partition on the side facing the partition, and the cooling jacket and the inner cavity of the drawing die are not connected to each other, one end of the two connecting tubes facing the cooling jackets are connected to the inner cavity of the connecting tubes, and the other ends of the two connecting tubes pass through to the outside of the box body.

[0011] It is further preferred that the acid-free lubricating die box for the wire drawing machine also includes a powder discharge pipe, the lower end of which is connected to one end of the drawing die located in the cooling zone, and the upper end of which extends obliquely to above the powder feeding zone.

[0012] It is further preferred that the acid-free lubricating die box for the wire drawing machine also includes two auxiliary rollers, both of which are rotatably connected to the box body, and one end of the powder pressing tube located on the outside of the box body faces the gap between the two auxiliary rollers.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a non-acid-washing lubricating die box for a wire drawing machine, which has the following beneficial effects:

[0015] In the utility model, by setting the powder pressing tube, when the steel wire passes through the drawing die for drawing, the surface of the steel wire can be pre-coated with drawing lubricant powder, and the drawing lubricant powder can be better extruded and attached to the steel wire, thereby improving the lubrication effect when the steel wire is drawn and reducing quality problems such as wire strain and hair pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a non-acid-washing lubricating die box for a wire drawing machine according to the implementation scheme;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the non-acid-washing lubricating die box for the medium wire drawing machine at another angle;

[0018] Figure 3 It is a schematic diagram of the structure of a compressed powder tube after being cut open according to the implementation scheme.

[0019] In the figure: 10, the box body; 11, the powder feeding area; 12, the cooling area; 20, the drawing die; 30, the cooling sleeve; 40, the connecting pipe; 50, the powder discharging pipe; 60, the powder pressing pipe; 61, the powder inlet hole; 62, the positive line; 63, the negative line; 70, the transmission assembly; 80, the auxiliary roller. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 3 , a pickling-free lubricating die box for a wire drawing machine, which may include a box body 10, a drawing die 20, a cooling sleeve 30, two connecting pipes 40, a powder discharging pipe 50, a powder pressing pipe 60, a transmission assembly 70, and two auxiliary rollers 80.

[0022] In the inner cavity of the box body 10, a powder feeding area 11 and a cooling area 12 are separated by a partition board, and openings respectively communicating with the powder feeding area 11 and the cooling area 12 are formed at the top of the box body 10.

[0023] The drawing die 20 is installed and fixed on the partition board, and both ends of the drawing die 20 extend into the powder feeding area 11 and the cooling area 12 respectively. Under the action of the drawing force, a wire rod or wire blank to be processed into a steel wire can pass through the drawing die 20 and be pulled out from its die hole, and then pass through the box body 10.

[0024] One side of the cooling sleeve 30 facing the partition board is welded and fixed to the partition board, and the cooling sleeve 30 is sleeved on the outer side of one end of the drawing die 20 located in the cooling area 12. The cooling sleeve 30 and the inner cavity of the drawing die 20 are not communicated with each other, and water can be input into the cooling sleeve 30 for cooling treatment.

[0025] Both ends of the two connecting pipes 40 facing the cooling sleeve 30 are communicated with the inner cavity of the connecting pipe 40, and the other ends of the two connecting pipes 40 both extend out of the box body 10. By using the two connecting pipes 40, the water in the cooling sleeve 30 can continuously flow in and out.

[0026] The lower end of the powder discharging pipe 50 is communicated with one end of the drawing die 20 located in the cooling area 12, and the upper end of the powder discharging pipe 50 extends obliquely above the powder feeding area 11. During the wire drawing process, the drawing lubricating powder attached to the surface of the steel wire will accumulate in the drawing die 20, and the accumulated drawing lubricating powder can be circulated and exported to the powder feeding area through the powder discharging pipe 50 for repeated use.

[0027] One end of the compressed powder tube 60 extends out of the box body 10, and the other end of the compressed powder tube 60 is connected to the adjacent end of the drawing die 20, and the compressed powder tube 60 can be driven and rotated in the powder feeding area 11 by a transmission assembly 70 installed on the outside of the box body 10. A plurality of powder inlet holes 61 evenly distributed along the radial direction of the compressed powder tube 60 are formed on the inner wall of the end of the compressed powder tube 60 away from the drawing die 20, and the powder inlet holes 61 penetrate the outer wall of the compressed powder tube 60, so that the wire drawing lubricating powder in the powder feeding area can enter the compressed powder tube 60 through the powder inlet holes 61 and contact the surface of the steel wire. A plurality of negative lines 63 and positive lines 62 are formed on the inner wall of one end of the compressed powder tube 60 close to the drawing die 20, and the negative lines 63 and positive lines 62 can be distributed in a spiral shape on the inner wall of the compressed powder tube 60. When the compressed powder tube 60 rotates, the contact between the negative lines 63 and the positive lines 62 and the surface of the steel wire can be utilized to squeeze the drawing lubricating powder onto the surface of the steel wire, thereby reducing quality problems such as scratches and roughening of the steel wire when passing through the drawing die 20.

[0028] The transmission assembly 70 can be configured as a belt drive structure or a chain drive structure driven by a motor. One pulley in the belt drive structure or one sprocket in the chain drive structure can be installed on one end of the powder tube 60 located outside the box body 10, and another pulley in the belt drive structure or another sprocket in the chain drive structure can be driven to rotate by the motor. The two pulleys or two sprockets can be connected by a transmission belt or a transmission chain so that the two rotate synchronously.

[0029] The two auxiliary rollers 80 are both rotatably connected to the box body 10 , and one end of the powder pressing tube 60 located outside the box body 10 faces the gap between the two auxiliary rollers 80 , and the steel wire can pass through the gap between the two auxiliary rollers 80 and be guided into the box body 10 .

[0030] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A non-acid-washing lubricating die box for a wire drawing machine, comprising a box body (10) and a drawing die (20), wherein the inner cavity of the box body (10) is divided into a powder feeding zone (11) and a cooling zone (12) by a partition, and the drawing die (20) is mounted and fixed on the partition, and the two ends of the drawing die (20) extend into the powder feeding zone (11) and the cooling zone (12) respectively, characterized in that: The invention also comprises a compressed powder tube (60), wherein the compressed powder tube (60) is rotatably arranged in the powder feeding area (11), and one end of the compressed powder tube (60) extends to the outside of the box body (10), and the other end of the compressed powder tube (60) is connected to the adjacent end of the drawing die (20), and a plurality of negative lines (63) and positive lines (62) distributed in a concave-convex manner are formed on the inner wall of one end of the compressed powder tube (60) close to the drawing die (20), and a plurality of powder inlet holes (61) uniformly distributed along the radial direction of the compressed powder tube (60) are formed on the inner wall of one end of the compressed powder tube (60) away from the drawing die (20), and the powder inlet holes (61) penetrate the outer wall of the compressed powder tube (60).

2. The non-acid-washing lubricating die box for a wire drawing machine according to claim 1, characterized in that: A plurality of the negative lines (63) and the positive lines (62) are distributed in a spiral shape on the inner wall of the powder pressing tube (60).

3. A non-acid-washing lubricating die box for a wire drawing machine according to claim 1 or 2, characterized in that: The invention also comprises a transmission assembly (70), wherein the transmission assembly (70) is installed on the outside of the box body (10), and the transmission assembly (70) is connected to one end of the compressed powder tube (60) extending to the outside of the box body (10), and the transmission assembly (70) is used to drive the rotation of the compressed powder tube (60).

4. The non-acid-washing lubricating die box for a wire drawing machine according to claim 1, characterized in that: It also includes a cooling jacket (30) and two connecting pipes (40), wherein the cooling jacket (30) is sleeved on the outside of one end of the drawing die (20) located in the cooling zone (12), one end of the two connecting pipes (40) facing the cooling jacket (30) is connected to the inner cavity of the connecting pipe (40), and the other ends of the two connecting pipes (40) are passed through to the outside of the box body (10).

5. The non-acid-washing lubricating die box for a wire drawing machine according to claim 4, characterized in that: The cooling jacket (30) is welded and fixed on the partition at one side facing the partition, and the cooling jacket (30) and the inner cavity of the drawing die (20) are not communicated with each other.

6. The non-acid-washing lubricating die box for a wire drawing machine according to claim 1, characterized in that: It also includes a powder discharge pipe (50), the lower end of which is connected to one end of the drawing die (20) located in the cooling zone (12), and the upper end of which extends obliquely to above the powder feeding zone (11).

7. The non-acid-washing lubricating die box for a wire drawing machine according to claim 1, characterized in that: It also comprises two auxiliary rollers (80), both of which are rotatably connected to the box body (10), and one end of the powder pressing tube (60) located outside the box body (10) faces the gap between the two auxiliary rollers (80).

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