CN114904994A - A kind of cold extrusion and cold drawing process of linear guide rail pair slider blank - Google Patents

Abstract

The invention discloses a cold extrusion and cold drawing process for a slide block blank of a linear guide rail pair, which comprises the following preparation steps of: step S1: preparing materials; step S2: annealing; step S3: phosphorization and lubrication; step S4: performing cold extrusion molding; step S5: forming and fixing a broach; step S6: shot blasting; step S7: and (4) deburring and flashing. The invention selects round steel or proper raw material blank after hot rolling, and finishes the design size after annealing, phosphorization lubrication treatment, cold extrusion molding, vertical/horizontal broaching machine size fixing, shot blasting treatment and end face milling treatment.

Description

A kind of cold extrusion and cold drawing process of linear guide rail pair slider blank

technical field

The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a cold extrusion and cold drawing process of a blank of a pair of linear guide rails.

Background technique

With the continuous development of modern manufacturing technology, the traditional manufacturing industry has undergone tremendous changes. Numerical control technology, mechatronics and industrial robots have been more widely used in production, and the linear guide pair slider is mainly used in automation. equipment, industrial robots, artificial intelligence equipment and machine tool industries, etc.

At present, the production process of the blank of the linear guide pair slider is as follows: 1) As shown in Figure 2, a strip-shaped hot-rolled blank is selected, with a length ranging from 4 to 6 meters; 2) After annealing treatment; 3) For the first drawing The bed is cold drawn to the designed first size; 4) It is annealed again, and then the second broach is cold drawn to the second size; 5) It can be completed after 5 to 8 repeated processes. 3-5 Design requirements for the cross-sectional size of the strip hot-rolled blank 2; 6) The strip section steel after cold drawing is bent due to the long length, and needs to be straightened; 7) Due to the oil stains such as oxide scale that occurs during cold drawing , need to be sandblasted; 8) Because the product is individual, then the strip section steel needs to be processed with a circular saw or a blanking machine, and finally reaches the design size in Figure 3-5.

The above original process requires annealing once every time it is drawn, and a total of 5 to 8 times of cold drawing, annealing, cold drawing, annealing, final straightening, shot blasting, and blanking process are required. Cost and repeated waste have the disadvantages of low-quality and high-cost manufacturing, and then the cold-drawn section steel is annealed for many times, cold-drawn for many times, coupled with the working strength factors such as the length of the section steel material, which will bring about the working environment and personal safety at work. extreme uncertainty.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a process of cold extrusion and cold drawing of the blank of the linear guide rail pair to solve the above-mentioned problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a cold extrusion and cold drawing process for the blank of the pair of linear guide rails.

Step S1: material preparation: first take the hot-rolled raw material or round steel blank, and make the raw material blank according to the design size for disc sawing processing;

Step S2: Annealing: annealing and softening each processed raw material blank in Step S1;

Step S3: phosphating and lubricating: performing phosphating surface lubricating treatment on each of the processed raw material blanks in step S2, and applying graphite on the surface;

Step S4: cold extrusion molding: put each processed raw material blank in step S3 in a special die of the corresponding size of cemented carbide material, and open the hydraulic press to carry out cold extrusion process compression molding;

Step S5: broach forming and fixing: put the two cold-extruded products in step S4, face-to-face, into a professional mold of the corresponding size of the broaching machine for the last molding production in the slider channel;

Step S6: shot blasting: each processed raw material blank in step S5 is shot blasted once to clean the dirt and oxide scale on the surface;

Step S7: Deburring and flashing: deburring and flashing the two end faces of each raw material blank processed in step S6 to obtain a finished linear guide pair slider blank.

Preferably, the raw material blank in step S1 is a strip-shaped hot-rolled blank or a strip-shaped round steel.

Preferably, the hardness of the raw material blank after annealing and softening treatment in step S2 is HB140-210 Brinell hardness.

Preferably, the raw material blank in step S3 is subjected to phosphating surface lubrication treatment.

Preferably, the raw material blank in step S4 is put into a special die cavity for cemented carbide in a hydraulic press for extrusion molding.

Preferably, the broaching machine in step S5 adopts a vertical/recumbent broaching machine.

Compared with the prior art, the present invention has a considerable cost advantage compared with the original cold-drawing process of the pair of linear guide rails, because the cold-drawing process requires multiple annealing and multiple cold-drawing to complete a qualified finished blank. There are as many as more than a dozen processes, and there are certain restrictions on the investment of cold-drawing equipment and venues. For example, the plant area needs to be 100 meters long before the equipment can be placed, and the equipment also needs multiple cold-drawing lines to complete a certain output. , and the quality produced by the cold drawing and cold extrusion processes is not the same. One is the drawing process in the cold state to remove the excess material to achieve the purpose, and the other is the extrusion process in the cold state to squeeze the excess material. The pressure is deposited into a certain cavity, which improves the compactness of the product virtually, and improves the wear resistance for the final use of the linear guide pair slider. Therefore, the original process has the defects of high cost, low quality, and high investment threshold. On the other hand, the present invention can realize a complete blank product with only seven working procedures, and has the advantages of fewer working procedures, low cost, and good quality.

Description of drawings

Fig. 1 is the contrast diagram of raw material hot-rolled blank and product linear guide rail pair slider blank in the present invention;

Fig. 2 is the front view of raw material hot rolling blank in the present invention;

Fig. 3 is the front view of the blank of product linear guide rail pair slider in the present invention;

Fig. 4 is the rear view of the blank of product linear guide rail pair slider in the present invention;

Fig. 5 is the bottom view of the blank of product linear guide rail pair slider in the present invention;

In the picture: 1- Linear guide rail pair slider blank, 2- Strip hot-rolled blank.

Detailed ways

The present invention provides a technical solution, a cold extrusion and cold drawing process for the blank of the pair of linear guide rails. The preparation steps of the blank 1 of the pair of linear guide rails are as follows:

Step S1: material preparation: first take the hot rolled or round steel raw material blank, and make the raw material blank according to the design size for disc sawing processing;

Step S2: Annealing: perform annealing and softening treatment on each of the processed raw material blanks in Step S1;

Step S3: Phosphating Lubrication: Each processed raw material blank in Step S2 is subjected to phosphating surface lubrication treatment, and graphite is applied on the surface to reduce the surface friction coefficient during cold extrusion;

Step S4: cold extrusion molding: put each processed raw material blank in step S3 in a special die of the corresponding size of cemented carbide material, open the hydraulic press to carry out cold extrusion process compression molding;

Step S5: broach forming and fixing: the dimensions of the products produced in the early stage of cold extrusion are relatively stable, but due to the long-term load extrusion, the machine and the die are worn, and the size will deviate. Therefore, it is necessary to increase the implementation of the following steps. The first process is the broach forming and fixing process. The two cold-extruded products in step S4 are placed face-to-face into a professional mold of the corresponding size of the vertical/horizontal broach for the last forming production in the slider channel. , which can provide a solid and stable blank finished size for mass production;

Step S6: shot blasting: each processed raw material blank in step S5 is shot blasted once to clean the dirt and oxide scale on the surface;

Step S7: Deburring and burring: Due to the burrs and burrs that appear after cold extrusion and broaching, the appearance and use of the entire workpiece are affected. Carry out deburring and flash processing, and process to the design size to obtain the finished product of the linear guide pair slider blank 1.

Wherein, in this embodiment, the raw material blank in the step S1 is a strip-shaped hot-rolled blank 2 or a strip-shaped round steel.

Wherein, in this embodiment, the hardness of the raw material blank after the annealing and softening treatment in the step S2 is HB140-210 Brinell hardness.

Wherein, in this embodiment, the raw material blank in the step S3 is subjected to phosphating surface lubrication treatment.

Wherein, in the present embodiment, the raw material blank in the step S4 is placed in a special die of the corresponding size of the cemented carbide material, and is pressed and formed by a cold extrusion process;

Wherein, in this embodiment, the broaching machine in step S5 is a vertical-horizontal broaching machine.

The present invention is further explained below in conjunction with the examples, but does not limit the protection scope of the present invention.

Example 1

Please refer to Figure 1-2, first take the 20crmo strip-shaped hot-rolled blank 2 produced by the hot-rolling plant, with a length of 4-6 meters or a round bar on the market, after annealing, phosphating and lubricating treatment, cold extrusion forming , vertical and horizontal broaching machine with fixed size, shot blasting, and end face milling to complete the design size shown in Figure 3-5. Due to the cold extrusion process, the product density quality is improved virtually, and the production cost is reduced. It removes the hidden danger of safe production, improves the customer's desire for quality and cost and the working environment of workers.

Compared with the original cold-drawing process of the pair of linear guide rails, the present invention has a considerable cost advantage, because the cold-drawing process requires multiple annealing and multiple cold-drawings to complete a qualified finished blank, and more than a dozen processes are required. In addition, there are certain restrictions on the investment of cold-drawing equipment and sites. For example, the plant area needs to be 100 meters long before the equipment can be placed, and the equipment also needs multiple cold-drawing lines to complete a certain output. The quality produced by the pressing process is also different. One is the drawing process in the cold state to remove excess material to achieve the purpose, and the other is the extrusion process in the cold state to extrude and accumulate the excess material to a certain shape. The density of the product is improved in the cavity, and the wear resistance is improved for the final use of the linear guide pair slider, so the original process has the defects of high cost, low quality and high investment threshold. However, the present invention can realize a complete blank finished product with only seven working procedures, and has the advantages of fewer working procedures, low cost and good quality.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes that come within the meaning and scope of equivalents of , are intended to be embraced within the invention, and any signs in the claims should not be construed as limiting the scope of the claims involved.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A cold extrusion and cold drawing process for a slide block blank of a linear guide rail pair is characterized in that: the preparation method of the linear guide rail pair sliding block blank comprises the following steps:

step S1: preparing materials: taking round steel or a proper raw material blank after hot rolling, and carrying out circular saw blanking treatment on the raw material blank according to the designed size;

step S2: annealing: annealing and softening each processed raw material blank in the step S1;

step S3: phosphorization and lubrication: performing phosphating surface lubrication treatment on each raw material blank treated in the step S2, and coating graphite on the surface;

step S4: and (3) cold extrusion molding: placing each processed raw material blank in the step S3 in a special die cavity made of hard alloy materials, and starting an oil press to perform cold extrusion process pressing forming;

step S5: and (3) broaching tool forming and fixing: putting the two cold-extruded products obtained in the step S4 into a special die with corresponding size of a broaching machine for the last molding production in the slide block channel;

step S6: shot blasting: performing shot blasting treatment on each raw material blank treated in the step S5 once to clean dirt and oxide skin on the surface;

step S7: deburring and flashing: and (5) performing deburring and flashing treatment on two end surfaces of each processed raw material blank in the step (S6) to obtain a linear guide rail pair sliding block blank finished product.

2. The process of claim 1 for cold extrusion and cold drawing of the linear guide pair slider blank is characterized in that: the raw material blank in the step S1 is a strip hot rolled section steel blank or a strip round steel.

3. The process of claim 1 for cold extrusion and cold drawing of the linear guide pair slider blank is characterized in that: the hardness of the raw material blank in the step S2 after annealing and softening treatment is HB140-210 Brinell hardness.

4. The process of claim 1 for cold extrusion and cold drawing of the linear guide pair slider blank is characterized in that: and the raw material blank in the step S3 is subjected to phosphating surface lubricating treatment.

5. The process of claim 1 for cold extrusion and cold drawing of the linear guide pair slider blank is characterized in that: and (5) placing the raw material blank in the step (S4) into a special hard alloy die cavity in an oil press for extrusion forming.

6. The process of claim 1 for cold extrusion and cold drawing of the linear guide pair slider blank is characterized in that: the broaching machine in the step S5 adopts a vertical/horizontal broaching machine.

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