Printing roller processing method for reducing deformation of roller body
Technical Field
The invention relates to the technical field of gravure printing, in particular to a plate roller processing method for reducing deformation of a roller body.
Background
At present, the processing method of the plate roller adopted in the market is as follows: the method comprises the steps of firstly cutting a seamless steel pipe into a steel roller base body, then matching outer plate plugs with proper sizes according to the sizes of two ends of the steel roller, turning rabbets at two ends of the steel roller according to the sizes of the outer plate plugs, then welding inner support rings inside a roller body, then performing girth welding on the plate plugs at two ends of the steel roller, roughly turning the steel roller, then repairing holes of the plate plugs, and finally performing processes of finish turning, balance measurement, grinding, inspection and the like on the steel roller.
Because the mode of electric welding direct welding is adopted in the process of welding the inner support ring, thermal deformation can be generated during welding, the problem of welding stress can be generated during processing, so that the middle position of the roller body is deformed, and the problems of poor uniformity of the wall thickness of the steel roller and reduction of the strength of the roller body can be generated after the subsequent rough turning step; the seamless steel tube produced by each large steel plant has defects due to the problems of raw materials, processing technology, uneven wall thickness and the like, the stress of the materials is released unevenly after links such as cutting, processing excircle and the like, so the excircle size deviation and deformation are caused, and the process of turning a seam allowance after the steel tube is cut needs to clamp the excircle of the steel tube by a chuck of a numerical control machine tool for processing, namely, the excircle of the steel tube is processed by taking the excircle of the steel tube as a reference, because the problems of welding stress, plate blocking assembly precision and the like are easy to occur in the process of ring welding plate blocking, the seamless steel tube is directly processed by jacking a top tip to a plate blocking hole during rough turning, the original reference surface of the excircle of the steel tube is lost, so the processing precision deviation of subsequent processing steps cannot be eliminated, the problems of poor wall thickness uniformity, deformation and reduced strength of the steel tube further occur, the processing precision of the steel tube is seriously influenced, and defective products are generated, greatly influencing the production efficiency and the product percent of pass and increasing the production cost. Therefore, it is important to invent a plate roll processing method for reducing deformation of a roll body.
Disclosure of Invention
The invention aims to provide a plate roller processing method for reducing deformation of a roller body, and solves the problems that in the traditional plate roller processing process, a steel roller is easy to deform, the wall thickness uniformity is poor, the strength of the steel roller is reduced, and the subsequent processing precision is influenced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a processing method of a printing roller for reducing deformation of a roller body comprises the steps of firstly cutting a seamless steel pipe into a steel roller base body, then processing a printing blocking rough blank into adaptive printing blocks according to sizes of two ends of the steel roller for standby, and then clamping an excircle of the steel roller by a chuck of a machine tool to machine rabbets on the two ends of the steel roller, wherein the processing method further comprises the following steps:
processing an inner support ring matched with the inner diameter of the steel roller, and fixing the inner support ring at the middle position of the inner wall of the steel roller by using glue;
assembling the plate plugs at two ends of the steel roller and welding the plate plugs in a girth welding mode;
clamping the excircle of the steel roller by using a chuck of a machine tool, and repairing the blocked hole of the plate;
and (4) extending the tip into the hole-repaired plug hole, and butting the two ends of the plate plug to perform rough turning on the roller body.
Further, when the inner support ring is processed, the outer diameter of the inner support ring is 0.05-0.1mm smaller than the inner diameter of the steel roller.
Further, the glue is high-strength welding glue.
Furthermore, when the inner support ring is installed, the inner support ring is firstly installed in the steel roller, glue is applied along the upper circumference and the lower circumference of the support ring, and the inner support ring is fixed on the inner wall of the steel roller.
The invention has the beneficial effects that: by utilizing the processing method provided by the invention, the inner support ring is connected by utilizing glue, so that the problem of welding stress can be effectively avoided, and the deformation of the middle position of the printing roller is prevented; meanwhile, the hole trimming procedure is placed before the rough turning procedure, the clamping mode during hole trimming is the same as that during the seam allowance turning, the welding stress problem and the error problem during assembly can be effectively eliminated, and the uniformity and the strength of the wall thickness of the steel roller are ensured.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a structural view of a plate plug of the present invention.
FIG. 2 is a partial structural view of the steel roll of the present invention, mainly showing the structure of the seam allowance.
Fig. 3 is a schematic view of the structure of the support ring assembled in the steel roller in the present invention.
Detailed Description
A processing method of a printing roller for reducing deformation of a roller body comprises the steps of firstly cutting a seamless steel pipe into a section of a steel roller 1 substrate, putting the cut steel roller 1 into a roundness correction machine for performing roundness correction operation, and eliminating steel rollers with poor roundness (larger than 1mm) and poor straightness (larger than 3 mm); as shown in fig. 1, processing the plate plug rough blank into a matched plate plug 3 according to the size of two ends of a steel roller 1 for standby, then clamping the excircle of the steel roller 1 by using a chuck of a numerical control machine tool to machine a spigot 11 at two ends of the steel roller, as shown in fig. 2, wherein the spigot 11 is used for matching a boss of the plate plug 3, and the processing method further comprises the following steps:
as shown in fig. 3, firstly, an inner support ring 2 which is adapted to the inner diameter of the steel roller 1 is processed and fixed at the middle position of the inner wall of the steel roller 1 by glue; the installation of the inner support ring 2 plays a role in supporting the inner wall of the steel roller 1, so that the steel roller 1 is prevented from deforming, and the strength of the roller body structure is effectively increased;
then assembling the plate plugs 3 shown in figure 1 at two ends of the steel roller 1 and welding the two ends in a girth welding way, and cooling for 30 minutes after welding;
then clamping the excircle of the steel roller 1 by using a chuck of a machine tool, and trimming the blocked hole 31 of the plate by using a double-head hole trimming machine by still taking the excircle of the steel roller 1 as a reference, so that the process deviation after welding can be eliminated;
then the tip of the machine tool is inserted into the hole-repaired plugging hole 31 to push the two ends of the plate plug 3 to perform rough turning on the roller body.
The subsequent process is the conventional process of plate roller processing, namely, the processes of finish turning, balance measurement, grinding, inspection and the like are carried out on the steel roller.
Further, in order to ensure that the inner support ring 2 can be better installed inside the steel roller 1 and does not fall off during gluing, in the step of processing the inner support ring, the outer diameter of the inner support ring 2 is 0.05-0.1mm smaller than the inner diameter of the steel roller 1.
Further, in the step of bonding the inner support ring, the glue is high-strength welding glue. The Aigao 6101 high-strength welding paste produced by Shenzhen Shenxing science and technology Limited can be adopted, and has the advantages of high adhesion to metal, strong impact resistance, good bonding performance and low shrinkage rate in the curing process. Can effectively ensure the bonding firmness of the inner support ring and prevent the inner support ring from falling off. The mode of replacing electric welding direct welding with high-strength welding glue can reduce the acting force of the inner support ring on the inner wall of the steel roller, play a role in buffering and play a role in supporting at the same time.
Further, in order to more firmly adhere the inner support ring 2 to the inner wall of the steel roller 1, in the step of adhering the inner support ring, the inner support ring 2 is firstly installed inside the steel roller 1, then the glue is applied along the upper and lower circumferences of the support ring 2, and the inner support ring 2 is fixed on the inner wall of the steel roller 1.
The plate roller processing method for reducing deformation of the roller body is described above by way of example with reference to the accompanying drawings, and it is obvious that the specific implementation of the invention is not limited in the above manner, and it falls within the scope of the invention as long as various improvements are made by the method concept and technical solution of the invention, or the method is directly applied to other occasions without improvement.