A cold extrusion and cold drawing process for the blank of a linear guide pair slider

Abstract

The present invention discloses a cold extrusion and cold drawing process for the blank of a linear guide pair slider. The preparation steps of the blank of the linear guide pair slider are as follows: Step S1: Prepare materials; Step S2: Anneal; Step S3: Phosphatize and lubricate; Step S4: Cold extrusion forming; Step S5: Fix the size by broaching; Step S6: Shot peening; Step S7: Deburr and remove flash. The present invention selects a round steel or a suitable raw material blank after hot rolling, and after annealing, phosphatizing and lubricating treatment, cold extrusion forming, fixing the size by a vertical / horizontal broaching machine, shot peening treatment, and milling the end face, the designed size is completed. Due to the cold extrusion process, the density quality of the product is virtually improved, the production cost is reduced, the hidden danger of safe production is eliminated, and the customer's desire for quality and cost and the working environment of workers are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical manufacturing, and particularly relates to a cold extrusion and cold drawing process for the blank of a linear guide pair slider. Background Art

[0002] With the continuous development of modern manufacturing technology, the traditional manufacturing industry has undergone great changes. Numerical control technology, mechatronics, and industrial robots have been more widely used in production, and this linear guide pair slider is mainly applied to automated equipment, industrial robots, artificial intelligence equipment, and the machine tool industry, etc.

[0003] Currently, the production process for the blank of the linear guide pair slider is as follows: 1) As Figure 2 shown, select a strip-shaped hot-rolled blank with a length ranging from 4 to 6 meters; 2) Perform annealing treatment; 3) Conduct the first cold drawing on a drawbench to the first designed size; 4) Conduct annealing again, and then conduct the second cold drawing on the drawbench to the second size; 5) Complete the cross-sectional dimension requirements of the strip-shaped hot-rolled blank 2 designed as Figures 3 - 5 through 5 to 8 times of repeated processes; 6) The strip-shaped section steel after cold drawing is bent due to its long length and needs to be straightened; 7) Due to the oxide scale and other oil stains during cold drawing, sandblasting treatment needs to be done; 8) Since the product is in individual shape, the strip-shaped section steel needs to be cut with a circular saw or a cutting machine to finally reach Figures 3 - 5 the designed size.

[0004] For the above original process, annealing is required each time it is drawn. A total of 5 to 8 times of cold drawing, annealing, cold drawing, and annealing are needed, and finally straightening, shot blasting, and cutting processes. Due to the numerous processes, the production cost and repeated waste are increased invisibly, and it has the drawbacks of low quality and high-cost manufacturing. Then, the multiple annealings and multiple cold drawings of the cold-drawn section steel, combined with the working intensity factors such as the length of the section steel, bring extremely uncertain hidden dangers to the working environment and personal safety during work. Summary of the Invention

[0005] The purpose of the present invention is to provide a cold extrusion and cold drawing process for the blank of a linear guide pair slider to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A cold extrusion and cold drawing process for the blank of a linear guide pair slider, the key structural points of which are as follows: The preparation steps of the blank of the linear guide pair slider are as follows:

[0007] Step S1: Prepare materials: First, take hot-rolled raw materials or round steel blanks, and perform circular saw cutting on the raw material blanks according to the designed size;

[0008] Step S2: Anneal: Perform annealing and softening treatment on each processed raw material blank in Step S1;

[0009] Step S3: Phosphating and lubricating: Perform phosphating surface lubrication treatment on each processed raw material blank in Step S2, and apply graphite on the surface.

[0010] Step S4: Cold extrusion forming: Place each processed raw material blank in Step S3 into a special mold of corresponding size made of cemented carbide, and start the hydraulic press to perform cold extrusion process for forming.

[0011] Step S5: Broaching and forming fixation: Place the two products after cold extrusion forming in Step S4 face to face into a professional mold of corresponding size in a broaching machine to perform the final forming production in the slider channel.

[0012] Step S6: Shot peening: Subject each processed raw material blank in Step S5 to shot peening once to clean the dirt and scale on the surface.

[0013] Step S7: Deburring and flashing removal: Perform deburring and flashing removal on both end faces of each processed raw material blank in Step S6 to obtain the finished product of the linear guide pair slider blank.

[0014] Preferably, the raw material blank in Step S1 is a strip-shaped hot-rolled blank or a strip-shaped round steel.

[0015] Preferably, the hardness of the raw material blank after annealing and softening treatment in Step S2 is HB140 - 210 Brinell hardness.

[0016] Preferably, the raw material blank in Step S3 is subjected to phosphating surface lubrication treatment.

[0017] Preferably, the raw material blank in Step S4 is placed in a special cemented carbide mold cavity in the hydraulic press for extrusion forming.

[0018] Preferably, the broaching machine in Step S5 is a vertical / horizontal broaching machine.

[0019] Compared with the prior art, the present invention has considerable cost advantages in comparison with the original cold drawing process of the linear guide auxiliary slider, because the cold drawing process requires multiple annealing and multiple cold drawing, and it requires more than a dozen processes to complete a qualified finished product blank, and the investment in cold drawing equipment, site, etc. has certain limitations. For example, the plant area needs to be 100 meters long to place the equipment, and the equipment also needs multiple cold drawing lines to complete a certain output. Moreover, the quality produced by the cold drawing and cold extrusion processes is also different. One is the drawing process in the cold material state to remove excess material to achieve the purpose, and the other is the extrusion process in the cold material state to squeeze and accumulate the excess material into a certain cavity, which invisibly improves the density of the product and improves the wear resistance for the final use of the linear guide auxiliary slider. Therefore, the original process has the defects of high cost, low quality, and high investment threshold. The present invention only needs seven processes to achieve a complete blank finished product, which has the advantages of fewer processes, low cost, and good quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a comparison diagram of the raw material hot-rolled blank and the product linear guideway auxiliary slider blank in the present invention;

[0021] Figure 2 It is a front view of the raw material hot-rolled blank in the present invention;

[0022] Figure 3 This is a front view of the blank of the linear guideway auxiliary slider of the product of the present invention;

[0023] Figure 4 It is a rear view of the blank of the linear guideway auxiliary slider of the product of the present invention;

[0024] Figure 5 It is a bottom view of the blank of the linear guideway auxiliary slider of the product of the present invention;

[0025] In the figure: 1- linear guide rail slider blank, 2- strip hot-rolled blank. DETAILED DESCRIPTION

[0026] The present invention provides a technical solution, a linear guide rail auxiliary slider blank cold extrusion and cold drawing process, the linear guide rail auxiliary slider blank 1 is prepared in the following steps:

[0027] Step S1: material preparation: first take the hot-rolled or round steel raw material blank, and cut the raw material blank into pieces by a circular saw according to the designed size;

[0028] Step S2: Annealing: annealing and softening each raw material blank processed in step S1;

[0029] Step S3: phosphating lubrication: each raw material blank processed 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;

[0030] Step S4: Cold extrusion forming: Place each processed raw material blank in step S3 into a special mold of corresponding size made of cemented carbide, and start the hydraulic press to perform cold extrusion process for forming;

[0031] Step S5: Broaching forming and fixing: The sizes of the products produced in the early stage of cold extrusion are relatively stable. However, due to long-term load extrusion, the machine and the mold are worn, resulting in dimensional deviations. Therefore, on this basis, it is necessary to add the next process, which is the broaching forming and fixing process. Place the two products after cold extrusion forming in step S4 face to face into a professional mold of corresponding size in a vertical / horizontal broaching machine for the final forming production in the slider channel, which can provide a strong and stable blank finished product size for mass production;

[0032] Step S6: Shot peening: Subject each processed raw material blank in step S5 to shot peening once to clean the dirt and scale on the surface;

[0033] Step S7: Deburring and flashing: Due to burrs and flashing such as uneven end faces after cold extrusion and broaching, which affect the appearance and use of the entire workpiece, perform deburring and flashing treatment on both end faces of each processed raw material blank in step S6, and process it to the designed size to obtain the finished product of the linear guide pair slider blank 1.

[0034] Among them, in this embodiment, the raw material blank in step S1 is a strip-shaped hot-rolled blank 2 or a strip-shaped round steel.

[0035] Among them, in this embodiment, the hardness of the raw material blank after annealing and softening treatment in step S2 is HB140 - 210 Brinell hardness.

[0036] Among them, in this embodiment, the raw material blank in step S3 is subjected to phosphating surface lubrication treatment.

[0037] Among them, in this embodiment, the raw material blank in step S4 is placed in a special mold of corresponding size made of cemented carbide and formed by cold extrusion process;

[0038] Among them, in this embodiment, the broaching machine in step S5 is a vertical and horizontal broaching machine.

[0039] The following further explains and illustrates the present invention in conjunction with embodiments, but does not limit the protection scope of the present invention.

[0040] Embodiment 1

[0041] Please refer to Figures 1 - 2First, take the 20crmo hot-rolled blank produced by the hot rolling mill, the length of which varies from 4 to 6 meters or the round steel on the market, after annealing, phosphating and lubrication treatment, cold extrusion forming, vertical and horizontal broaching machine fixing size, shot blasting, milling end surface treatment to complete Figures 3 - 5 The design dimensions shown in the figure, due to the cold extrusion process, virtually improve the product density and quality, reduce production costs, eliminate hidden dangers in production safety, and improve customers' desire for quality and cost as well as the working environment of workers.

[0042] The present invention has considerable cost advantages compared with the original cold drawing process of the linear guide rail auxiliary slider, because the cold drawing process requires multiple annealing and multiple cold drawing, and it requires more than a dozen processes to complete a qualified finished product blank, and the equipment and site investment of cold drawing have certain limitations. For example, the plant area needs to be 100 meters long to place the equipment, and the equipment also needs multiple cold drawing lines to complete a certain output. In addition, the quality produced by the cold drawing and cold extrusion processes is also different. One is the drawing process in the cold material state to remove excess material to achieve the purpose, and the other is the extrusion process in the cold material state to squeeze and accumulate excess material into a certain cavity to improve the product density and improve the wear resistance for the final use of the linear guide rail auxiliary slider. Therefore, the original process has the defects of high cost, low quality, and high investment threshold. The present invention only needs seven processes to achieve a complete blank finished product, which has the advantages of fewer processes, low cost, and good quality.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any mark in the claims should not be regarded as limiting the claims involved.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cold extrusion and cold drawing process for the blank of a linear guide pair slider, characterized in that: The preparation steps of the blank of the linear guide pair slider are as follows: Step S1: Stock preparation: First, take a round steel or hot-rolled section steel blank as the raw material blank, and perform circular saw cutting on the raw material blank according to the design dimensions; Step S2: Annealing: Perform annealing and softening treatment on each processed raw material blank in Step S1. The hardness of the raw material blank in Step S2 after annealing and softening treatment is HB140 - 210 Brinell hardness; Step S3: Phosphating and lubrication: Perform phosphating surface lubrication treatment on each processed raw material blank in Step S2, and apply graphite on the surface; Step S4: Cold extrusion forming: Place each processed raw material blank in Step S3 in a die cavity made of cemented carbide, and start the oil press to perform cold extrusion process for forming; Step S5: Broaching forming: Place the two cold-extruded raw material blanks in Step S4 face to face in the die of the corresponding size of the broaching machine for the final forming production of the slider groove; Step S6: Shot peening: Perform shot peening treatment on each processed raw material blank in Step S5 once to clean the dirt and oxide scale on the surface; Step S7: Deburring and flashing removal: Perform deburring and flashing removal treatment on both end faces of each processed raw material blank in Step S6 to obtain the finished product of the blank of the linear guide pair slider.

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

3. The cold extrusion and cold drawing process for the blank of a linear guide pair slider according to claim 1, characterized in that: The broaching machine in Step S5 uses a vertical / horizontal broaching machine.

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