CN-117340552-B - Improvement method of stainless steel cold heading beam rod bending and nailing process

CN117340552BCN 117340552 BCN117340552 BCN 117340552BCN-117340552-B

Abstract

The invention relates to an improved method of a stainless steel cold heading beam bending nail process, which comprises the following steps of S1, setting the number of main dies and stamping dies according to processed workpieces and steps required by processing, S2, finishing the processing of the workpieces, carrying out an pickling process, setting pickling concentration in the range of 5-10% oxalic acid solution during processing, S3, cleaning finished workpieces, carrying out sand blasting on the workpieces, setting the sand blasting mesh number between 40 mesh and 80 mesh, and S4, carrying out surface treatment on the workpieces, wherein the surface treatment is set into four treatment modes of polishing, electrolysis, passivation and frosting. The invention can reduce the resistance of the binding rod by firstly forming the chamfer, then placing the preformed binding rod and the binding rod together and finally integrally forming, and can avoid the stress deformation when the wire rod is suspended and the bending deformation when the binding rod is in suspension in the moving forming preformed binding rod stage, thereby avoiding the problems that the traditional binding rod bending nail rod is easy to bend when not supported, and the rod part is easy to be pulled and easy to collide with a machine when in forming.

Inventors

YANG TIANHAO
LIU RUI

Assignees

豪梅特紧固件系统(苏州)有限公司

Dates

Publication Date: 20260505
Application Date: 20231009

Claims (4)

1. An improvement method of a stainless steel cold heading beam rod bending and nailing process is characterized by comprising the following steps: S1, setting the number of main dies and stamping dies according to the processed workpiece and the steps required by processing; s2, finishing processing of the workpiece, and performing an pickling process, wherein during processing, the pickling concentration is set in the range of 5-10% of oxalic acid solution; s3, cleaning a finished workpiece, and carrying out sand blasting on the workpiece, wherein the mesh number of the sand blasting is set between 40 meshes and 80 meshes; S4, carrying out surface treatment on the workpiece, wherein the surface treatment is set into four treatment modes of polishing, electrolysis, passivation and frosting; the step S1 may be refined as: s11, setting a first die as a chamfering die, and reducing resistance in the next procedure of rod bundling by preforming chamfering, so that material deformation time in forming is slowed down, and forming is more stable; S12, setting a second die as a die preforming head and a main die beam rod die, wherein a spring movable stamping die is used; s13, setting a third die as a shaping die for refining details of the beam bending nails and surface roughness; The step S2 may be refined as: S21, soaking oxalic acid, putting the beam bent nails which are subjected to cold heading and are in a high-temperature state into the oxalic acid, and slightly shaking to prevent hot gluing between parts; S22, drying in the shade, fishing out the bent bundle rod nails after the primary soaking is finished, checking whether hot-glued bent bundle rod nails exist or not, picking, tiling and naturally airing; s23, soaking oxalic acid again, and carrying out pickling work on the beam rod bent nails after being dried in the shade again; s24, fishing out the bent nails of the beam rods again, tiling and then carrying out secondary drying in the shade, and repeatedly shaking the bent nails of the beam rods in the drying process to ensure that the oxalic acid liquid outside the workpiece can be quickly dripped; the step S3 may be refined as: s31, firstly neutralizing the acidity of oxalic acid by using a mixture of sodium bicarbonate and water, and then cleaning a workpiece by using a clean water flushing or soaking mode; S32, selecting proper sand blasting materials, and selecting proper particle sizes and materials according to different stainless steel types and sizes of beam bending nails; s33, performing sand blasting operation to clean the curved nail surface of the beam rod and thoroughly remove oxalic acid residues on the curved nail surface of the beam rod; the step S4 may be refined as: S41, polishing, namely machining the stainless steel surface by using mechanical equipment and an abrasive material to remove the surface roughness, oxides and flaws, so that the surface is smoother and brighter; S42, electrolytic treatment, namely immersing the bent nails of the stainless steel beam rods into electrolyte, and polishing an anodic oxide layer generated on the surface of the stainless steel under the action of current so as to increase the gloss and the smoothness of the surface; S43, passivating, namely forming an oxide film on the surface of the stainless steel by using a passivating agent so as to increase the corrosion resistance and oxidation performance of the stainless steel; S44, sanding treatment, namely processing the stainless steel surface by using abrasive materials such as sand paper, grinding wheel and the like to form uniform abrasive grains and sanding effect, so that the texture and the attractive degree of the appearance are improved; The beam is prevented from being deformed under force when the wire is suspended in the air in the movable pre-forming stage, and is prevented from being bent and deformed when the wire is bundled, so that the problems that the traditional beam bending nail rod is easy to bend when the beam is not supported, and the rod part is easy to be pulled and easy to collide with a machine when the beam is formed are avoided; through the secondary oxalic acid process, the thickness of an oxalic acid film is improved, so that the adhesion time of oxalic acid materials on the surface of the beam rod bent nail can be greatly improved, the lubrication effect is improved, the oxalic acid failure time is delayed, and the dependence of wires on the storage environment is reduced.
2. The improvement of a stainless steel cold heading beam bending and nailing process according to claim 1, wherein the main die in the step S1 is used for extrusion molding, and the die is ejected through reciprocating motion.
3. The improvement of a stainless steel cold heading beam rod bending and nailing process according to claim 1, wherein in the step S1, the transverse movement of a clamp is realized between a main die and a die through a mechanical arm so as to realize material clamping, and the product is transferred from a previous main die to a next main die through the clamp.
4. The improvement of a stainless steel cold heading beam rod bending and nailing process according to claim 1, wherein the punch die in the step S1 performs reciprocating motion through a motor or a hydraulic cylinder.

Description

Improvement method of stainless steel cold heading beam rod bending and nailing process Technical Field The invention relates to the technical field of cold heading forming dies, in particular to an improvement method of a stainless steel cold heading beam rod bending and nailing process. Background Beam bending nails are a special construction and woodworking related material commonly used to secure and attach wood structures. The design of such nails allows them to provide additional tensile and shear strength to increase the stability and reliability of the connection. In the prior art, the following two problems exist in the die stamping process of the section bar of the beam rod bent nail: when the rod part is formed by cold heading, the rod part is easy to bend because the rod part is not supported, and the yield is affected; when the die is formed, the rod part is easy to be napped, so that the beam rod is unsmooth in die stripping, and the condition of collision easily occurs. In the storage process of the beam rod bent nail profile after the processing is finished, an improvement place exists: At present, before the beam rod bent nails are stored, pickling operation is needed, but single pickling is generally carried out, the timeliness of single pickling is poor, the profile is not used in five to ten days, the oxalic acid coating on the surface is invalid, the lubrication effect is seriously reduced, and the subsequent processing is inconvenient. Disclosure of Invention In view of the foregoing problems of the prior art, a primary object of the present invention is to provide an improved process for stainless steel cold heading beam rods. The technical scheme of the invention is that the improvement method of the stainless steel cold heading beam bending and nailing process comprises the following steps: S1, setting the number of main dies and stamping dies according to the processed workpiece and the steps required by processing; s2, finishing processing of the workpiece, and performing an pickling process, wherein during processing, the pickling concentration is set in the range of 5-10% of oxalic acid solution; s3, cleaning a finished workpiece, and carrying out sand blasting on the workpiece, wherein the mesh number of the sand blasting is set between 40 meshes and 80 meshes; s4, carrying out surface treatment on the workpiece, wherein the surface treatment is set into four treatment modes of polishing, electrolysis, passivation and frosting. Wherein, the step S1 may be refined as: s11, setting a first die as a chamfering die, and reducing resistance in the next procedure of rod bundling by preforming chamfering, so that material deformation time in forming is slowed down, and forming is more stable; S12, setting a second die as a die preforming head and a main die beam rod die, wherein a spring movable stamping die is used; and S13, setting a third die as a shaping die for refining the details of the beam bending nails and the roughness of the surface. Wherein, the step S2 may be refined as: S21, soaking oxalic acid, putting the beam bent nails which are subjected to cold heading and are in a high-temperature state into the oxalic acid, and slightly shaking to prevent hot gluing between parts; S22, drying in the shade, fishing out the bent bundle rod nails after the primary soaking is finished, checking whether hot-glued bent bundle rod nails exist or not, picking, tiling and naturally airing; s23, soaking oxalic acid again, and carrying out pickling work on the beam rod bent nails after being dried in the shade again; s24, fishing out the bent beam nails again, spreading, and performing secondary drying in the shade, wherein in the drying process, the bent beam nails are repeatedly shaken, so that the oxalic acid liquid outside the workpiece can be rapidly dripped. Wherein, the step S3 may be refined as: s31, firstly neutralizing the acidity of oxalic acid by using a mixture of sodium bicarbonate and water, and then cleaning a workpiece by using a clean water flushing or soaking mode; S32, selecting proper sand blasting materials, and selecting proper particle sizes and materials according to different stainless steel types and sizes of beam bending nails; And S33, performing sand blasting operation to clean the curved nail surface of the beam rod and thoroughly remove oxalic acid residues on the curved nail surface of the beam rod. Wherein, the step S4 may be refined as: S41, polishing, namely machining the stainless steel surface by using mechanical equipment and an abrasive material to remove the surface roughness, oxides and flaws, so that the surface is smoother and brighter; S42, electrolytic treatment, namely immersing the bent nails of the stainless steel beam rods into electrolyte, and polishing an anodic oxide layer generated on the surface of the stainless steel under the action of current so as to increase the gloss and the smoothness of the surface; S43, passivating, namely for