A high-precision linear guide rolling and drawing production line

Abstract

This invention discloses a high-precision linear guide rail rolling and drawing production line, which includes a feeding mechanism, a pre-straightening mechanism, a rolling mechanism, an online pressure tipping mechanism, a combined drawing mechanism, a precision online straightening mechanism, and a central control system arranged in sequence. The feeding mechanism, rolling mechanism, online pressure tipping mechanism, combined drawing mechanism, and precision online straightening mechanism are electrically connected to the central control system. This invention significantly improves material utilization and production efficiency, and at the same time, the complete metal flow lines improve the fatigue life and load-bearing capacity of the guide rail.

Description

Technical Field

[0001] This invention relates to the field of rolling and drawing equipment technology, and in particular to a high-precision linear guide rolling and drawing production line. Background Technology

[0002] Linear guides are core transmission components in high-precision equipment such as CNC machine tools, industrial robots, and precision measuring equipment. Their accuracy, lifespan, and reliability directly determine the performance of the host equipment. Currently, the main manufacturing processes for linear guide production lines, both domestically and internationally, are mainly the following two: (i) First, extrude or roll out a profile with an approximate cross-section, then process the ball grooves using a multi-axis CNC milling machine. After heat treatment, the raceway and mounting surface are finally ground using a precision grinding machine. (ii) Directly grind and shape the precision forged or cold-drawn billet. This method involves a large amount of grinding, long processing time, and extremely high cost. Both of these production line manufacturing methods have drawbacks such as serious material waste, low production efficiency, metal fiber cutting (as shown in the figure), and large equipment investment. Milling and grinding remove a large amount of material, and the material utilization rate is usually less than 50%. Multi-pass drawing requires intermediate annealing, resulting in a long process flow. The slow milling and grinding speeds are bottlenecks in the production process. Cutting processes destroy the inherent fibrous structure flow lines of the metal, reducing the fatigue strength and load-bearing capacity of the parts. High-precision CNC milling machines and guideway grinding machines are expensive.

[0003] While existing technologies employ cold drawing forming processes, the deformation per pass is small, making it difficult to form complex raceway profiles. This requires numerous passes and frequent intermediate annealing during the drawing process. Therefore, there is an urgent need for a linear guide production line that can balance high precision, high efficiency, high material utilization, and high performance. To this end, we propose a high-precision linear guide rolling and drawing production line. Summary of the Invention

[0004] The problem that this invention aims to solve is that existing linear guide production lines suffer from drawbacks such as low yield, low mass production efficiency, damage to metal fiber flow lines, and high equipment investment.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-precision linear guide rail rolling and drawing production line, comprising a feeding mechanism, a pre-straightening mechanism, a rolling mechanism, an online pressure tipping mechanism, a combined drawing mechanism, a precision online straightening mechanism, and a central control system arranged in sequence, wherein the feeding mechanism, the rolling mechanism, the online pressure tipping mechanism, the combined drawing mechanism, and the precision online straightening mechanism are electrically connected to the central control system.

[0006] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, the feeding mechanism is used to orderly convey the guide rail blank.

[0007] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, wherein: the pre-straightening mechanism is used to preliminarily straighten the guide blank, and the precision online straightening mechanism is used to precisely straighten the drawn linear guide finished product.

[0008] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, the online pressure tipping mechanism includes a coaxially arranged split-type combined contour clamping chuck, a tipping forming mold and a drive unit. The cavity contour of the split-type combined contour clamping chuck fits the contour of the guide rail blank. The split-type combined contour clamping chuck is used to clamp the guide rail blank. The tipping forming mold is used to tip the end of the guide rail blank for pretreatment, so that the end of the guide rail blank forms an introductory structure that is suitable for subsequent drawing and forming.

[0009] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, a surface treatment mechanism electrically connected to the central control system is further provided between the pre-straightening mechanism and the rolling mechanism, and the surface treatment mechanism includes a shot peening machine or a belt sander.

[0010] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, a cooling and lubrication mechanism is further provided between the online pressure tipping mechanism and the combined drawing mechanism. The cooling and lubrication mechanism includes a liquid pump, a liquid delivery pipeline and a spray nozzle. The liquid pump is electrically connected to the central control system. The cooling and lubrication mechanism is used to spray cooling and lubricating fluid onto the guide rail blank.

[0011] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, the combined drawing mechanism includes a finishing mold, a clamping component and a traction component. The cavity contour of the finishing mold is the geometric contour of the finished linear guide. The clamping component holds the guide blank end of the guide blank and the traction component provides axial tension to drive the guide blank through the finishing mold to complete the drawing and forming.

[0012] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, the rolling mechanism includes four rolling mills arranged in sequence. The roll pass types of the four rolling mills are set as circular pass type, elliptical pass type, groove pre-forming pass type, and pass type with finished ball groove in sequence. The roll pass type size of the last rolling mill used to roll the finished ball groove area has a positive tolerance compared with the size of the finishing die in the combined drawing mechanism.

[0013] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, an online dimension measuring mechanism electrically connected to the central control system is further provided between the combined drawing mechanism and the precision online straightening mechanism. The online dimension measuring mechanism includes a non-contact online geometric dimension detection system for real-time monitoring of the cross-sectional dimensions of the finished linear guide after forming.

[0014] As a preferred embodiment of the high-precision linear guide rolling and drawing production line of the present invention, wherein: the discharge side of the precision online straightening mechanism is provided with an online fixed-length cutting mechanism electrically connected to the central control system, the online fixed-length cutting mechanism is used to cut the formed linear guide finished product online to a set length.

[0015] The beneficial effects of this invention are as follows: This invention obtains the outline of the pre-formed guide rail blank precisely through multi-pass rolling, and then, after sharpening, continuous drawing and finishing of dimensions and precision straightening, the linear guide rail finished product with high-precision raceway is directly and continuously produced from the guide rail blank. This invention greatly improves material utilization and production efficiency, and at the same time, the fatigue life and load-bearing capacity of the guide rail are improved due to the complete metal flow lines. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a flowchart of the present invention.

[0017] Figure 2 This is a schematic diagram of the roll pass pattern of the four rolling mills in this invention.

[0018] Figure 3 This is a schematic diagram of the cavity structure of the finishing mold of the combined drawing mechanism 7 in this invention.

[0019] Figure 4 This is a schematic diagram comparing the microstructure of conventional milling (where the metal flow lines are cut off) and the plastic forming of the present invention (where the metal flow lines are intact). Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-4This embodiment is a high-precision linear guide rolling and drawing production line, including a feeding mechanism 1, a pre-straightening mechanism 2, a rolling mechanism 4, an online pressure tipping mechanism 5, a combined drawing mechanism 7, a precision online straightening mechanism 9 arranged in sequence, and a central control system. The feeding mechanism 1, the rolling mechanism 4, the online pressure tipping mechanism 5, the combined drawing mechanism 7, and the precision online straightening mechanism 9 are electrically connected to the central control system.

[0022] The guide rail blank is conveyed in an orderly manner by the feeding mechanism 1 to the pre-straightening mechanism 2 for preliminary straightening, and then enters the rolling mechanism 4 for rolling to form a guide rail rough blank with a basic shape and raceway profile close to the finished linear guide rail. The surface shrinkage and forming of more than 90% of the cross-sectional area is completed. Then, the pressure tipping mechanism 5 extrudes one end of the guide rail rough blank to form a drawing head. Then, the combined drawing mechanism 7 performs synchronous precision calibration and finishing on the raceway surface, mounting reference surface and overall profile of the guide rail rough blank to obtain the finished linear guide rail with the final size and surface quality. Finally, the finished linear guide rail is straightened by the precision online straightening mechanism 9. All mechanisms are coordinated and controlled by the central control system.

[0023] In this embodiment, the feeding mechanism 1 is used to orderly convey the guide rail blanks.

[0024] The feeding mechanism 1 can be a frequency-controlled feeding frame with tension control, and the feeding speed is controlled by the central control system.

[0025] In this embodiment, the pre-straightening mechanism 2 is used to perform preliminary straightening on the guide rail blank, and the precision online straightening mechanism 9 is used to perform precision straightening on the drawn linear guide rail finished product.

[0026] The pre-straightening mechanism 2 can adopt an independent multi-roller straightening unit to eliminate the original curvature of the guide rail blank before rolling. The precision online straightening mechanism 9 can adopt a laser positioning straightening machine to accurately compensate and straighten the finished linear guide rail.

[0027] In this embodiment, the online pressure tipping mechanism 5 includes a coaxially arranged split-type combined contour clamping chuck, a tipping forming mold, and a drive unit. The cavity contour of the split-type combined contour clamping chuck fits the contour of the guide rail blank. The split-type combined contour clamping chuck is used to clamp the guide rail blank, and the tipping forming mold is used to tip the end of the guide rail blank for pretreatment, so that the end of the guide rail blank forms an introductory structure that is adapted to subsequent drawing forming.

[0028] The guide rail blank is conveyed to the split-type combined contour clamping head. Since the cavity contour of the split-type combined contour clamping head fits the contour of the guide rail blank, it can ensure that the surface is not damaged when the split-type combined contour clamping head clamps the guide rail blank, limit the radial sway of the guide rail blank, and prevent instability and extrusion deformation and skewing when the drive unit pushes the tip forming die for tip forming.

[0029] In this embodiment, a surface treatment mechanism 3 electrically connected to the central control system is also provided between the pre-straightening mechanism 2 and the rolling mechanism 4. The surface treatment mechanism 3 includes a shot peening machine or a belt sander.

[0030] Used to treat oxide scale or surface defects on the surface of guide rail blanks, the power of the shot peening machine or belt sander is controlled by a central control system.

[0031] In this embodiment, a cooling and lubrication mechanism 6 is also provided between the online pressure tipping mechanism 5 and the combined drawing mechanism 7. The cooling and lubrication mechanism 6 includes a liquid pump, a liquid delivery pipeline and a spray nozzle. The liquid pump is electrically connected to the central control system. The cooling and lubrication mechanism 6 is used to spray cooling and lubricating liquid onto the guide rail billet.

[0032] The pump delivers cooling lubricant through the pipeline to the spray nozzles onto the surface of the guide rail blank, ensuring lubrication during the drawing process and reducing die wear. When the rolling speed of the rolling mechanism 4 is high and the deformation is large, the guide rail blank generates a lot of heat. The central control system can control the power of the pump to increase the spray volume, and when the speed is slow, it can automatically reduce the flow rate or even stop spraying to reduce waste.

[0033] In this embodiment, the combined drawing mechanism 7 includes a finishing mold, a clamping member, and a traction member. The cavity contour of the finishing mold is the geometric contour of the finished linear guide rail. The clamping member holds the guide rail blank end of the guide rail blank and the traction member provides axial tension to drive the guide rail blank through the finishing mold to complete the drawing process.

[0034] The clamping component holds the guide blank end of the guide blank, and the traction component provides axial tension, driving the guide blank through the finishing mold. It precisely includes the geometric contour, depth and radius of curvature of the ball groove M of the linear guide finished product, so that the raceway of the guide blank is precisely formed in one step during the drawing process.

[0035] In this embodiment, the rolling mechanism 4 includes four rolling mills arranged in sequence. The roll pass types of the four rolling mills are set as circular pass type, elliptical pass type, groove pre-formed pass type, and pass type with ball groove M in sequence. The roll pass type size of the last rolling mill used to roll the ball groove M area has a positive tolerance compared with the size of the finishing die in the combined drawing mechanism 7.

[0036] The guide rail blank passes through four rolling mills in sequence. After passing through different passes, the guide rail blank is finally rolled into a profile with ball grooves M. Passing through different passes of the four rolling mills in sequence can avoid directly rolling out the ball grooves, which would cause a sharp increase in metal deformation and thus lead to cracks. The positive tolerance dimension reserved by the last rolling mill provides plastic deformation allowance for subsequent drawing and finishing. This allows the ball grooves M to be evenly compacted when drawn through the finishing die in the combined drawing mechanism 7, which fits the curvature and size of the die cavity perfectly. The finished ball grooves M with the required precision are formed in one go. This avoids insufficient allowance in the ball groove M area, which would lead to under-drawing, and also avoids interference in the ball groove M area, which would cause jamming of the finishing die.

[0037] In this embodiment, an online dimension measuring mechanism 8 electrically connected to the central control system is also provided between the combined drawing mechanism 7 and the precision online straightening mechanism 9. The online dimension measuring mechanism 8 includes a non-contact online geometric dimension detection system, which is used to monitor the cross-sectional dimensions of the finished linear guide rail after forming in real time.

[0038] Non-contact online geometric dimension inspection systems can utilize existing commercially available equipment, such as the Keyence LJ-X8000 series line laser profile measuring instrument. These systems can detect dimensional deviations and straightness errors in ball grooves, preventing defective products from reaching subsequent processes. The collected profile data is transmitted to the central control system, which compares the data with a preset standard cross-section to calculate the deviation. It then immediately sends a compensation command to the subsequent precision online straightening mechanism to correct any minor deformations caused by the pull-out process, forming a closed-loop control system that ensures the cross-sectional accuracy of each guide rail section remains stably within the tolerance range.

[0039] In this embodiment, the discharge side of the precision online straightening mechanism 9 is provided with an online length-cutting mechanism 10 electrically connected to the central control system. The online length-cutting mechanism 10 is used to cut the formed linear guide rail finished product online according to a set length.

[0040] The online length-cutting mechanism 10 can be Shanghai Yanrun's ZY-200 or ZY-300Z guide rail precision cutting machine. The existing combined pulling mechanism 7 generally has a traction encoder. The traction encoder continuously sends length pulses to the central control system. When the preset length is reached, the central control system controls the guide rail precision cutting machine to perform a sawing action.

[0041] Working principle: The feeding mechanism 1 continuously and stably feeds the material. The pre-straightening mechanism 2 sends out the guide rail blank and completes the initial straightening. After pre-treatment by the surface treatment mechanism 3, it is sent to the rolling mechanism 4. Four rolling mills advance to roll out a guide rail blank with ball grooves M with positive tolerance. The guide rail blank is then end-formed by the online pressure heading mechanism 5. After being sprayed with lubrication by the cooling and lubrication mechanism 6, it is sent to the combined drawing mechanism 7. Excess metal is squeezed and filled in the finishing die to accurately form the ball grooves M of the finished product. Then, the finished linear guide rail enters the online dimension measurement mechanism 8. The cross-sectional contour data collected in real time is transmitted to the central control system to calculate the deviation. Immediately afterwards, a compensation command is issued to the precision online straightening mechanism 9 to correct the minor deformation after drawing; the traction encoder of the combined drawing mechanism 7 continuously sends length pulses to the central control system. When the preset length is reached, the central control system triggers the online fixed-length cutting mechanism 10 to complete synchronous fixed-length cutting. After the cutting completion signal is sent back to the central control system, the count is reset to zero and the next processing cycle of the finished product with ball groove M is entered. The product obtained by the present invention through plastic forming has complete metal flow lines, is not cut off, and is continuously distributed along the contour, which significantly improves the fatigue life and dynamic load-bearing capacity of the guide rail, especially the ball groove M area.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-precision linear guide rail rolling and drawing production line, characterized in that: It includes a feeding mechanism (1), a pre-straightening mechanism (2), a rolling mechanism (4), an online pressure tipping mechanism (5), a combined drawing mechanism (7), a precision online straightening mechanism (9) arranged in sequence, and a central control system. The feeding mechanism (1), the rolling mechanism (4), the online pressure tipping mechanism (5), the combined drawing mechanism (7) and the precision online straightening mechanism (9) are electrically connected to the central control system.

2. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: The feeding mechanism (1) is used to orderly convey the guide rail blanks.

3. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: The pre-straightening mechanism (2) is used to perform preliminary straightening of the guide rail blank, and the precision online straightening mechanism (9) is used to perform precision straightening of the drawn linear guide rail finished product.

4. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: The online pressure tipping mechanism (5) includes a coaxially arranged split-type combined contour clamping chuck, a tipping forming mold and a drive unit. The cavity contour of the split-type combined contour clamping chuck fits the contour of the guide rail blank. The split-type combined contour clamping chuck is used to clamp the guide rail blank. The tipping forming mold is used to tip the end of the guide rail blank for pretreatment, so that the end of the guide rail blank forms an introductory structure that is suitable for subsequent drawing forming.

5. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: A surface treatment mechanism (3) electrically connected to the central control system is also provided between the pre-straightening mechanism (2) and the rolling mechanism (4). The surface treatment mechanism (3) includes a shot peening machine or a belt sander.

6. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: A cooling and lubrication mechanism (6) is also provided between the online pressure tipping mechanism (5) and the combined drawing mechanism (7). The cooling and lubrication mechanism (6) includes a liquid pump, a liquid delivery pipeline and a spray nozzle. The liquid pump is electrically connected to the central control system. The cooling and lubrication mechanism (6) is used to spray cooling and lubricating fluid onto the guide rail blank.

7. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: The combined drawing mechanism (7) includes a finishing mold, a clamping component and a traction component. The cavity profile of the finishing mold is the geometric profile of the finished linear guide rail. The clamping component holds the guide rail blank end of the guide rail blank and the traction component provides axial tension to drive the guide rail blank through the finishing mold to complete the drawing process.

8. The high-precision linear guide rolling and drawing production line as described in claim 7, characterized in that: The rolling mechanism (4) includes four rolling mills arranged in sequence. The roll pass types of the four rolling mills are set as circular pass type, elliptical pass type, groove pre-formed pass type, and pass type with ball groove (M) in sequence. The roll pass type size of the last rolling mill used to roll the ball groove (M) area has a positive tolerance compared with the size of the finishing die in the combined drawing mechanism (7).

9. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: An online dimension measuring mechanism (8) electrically connected to the central control system is also provided between the combined drawing mechanism (7) and the precision online straightening mechanism (9). The online dimension measuring mechanism (8) includes a non-contact online geometric dimension detection system for real-time monitoring of the cross-sectional dimensions of the finished linear guide rail after forming.

10. The high-precision linear guide rail rolling and drawing production line according to claim 1, characterized in that: The precision online straightening mechanism (9) is provided with an online fixed-length cutting mechanism (10) electrically connected to the central control system on the discharge side. The online fixed-length cutting mechanism (10) is used to cut the formed linear guide rail finished product online according to the set length.

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