Rolling element room temperature skew rolling mill

Abstract

A kind of rolling element room temperature skew rolling mill, it includes: guide rail pair, first roller fixed part capable of sliding mounted on the guide rail pair, second roller fixed part capable of sliding mounted on the guide rail pair, symmetric screw pair for driving the first roller fixed part and second roller fixed part to realize symmetrical synchronous separation or converging action, and positioning device for limiting the position movement of the first roller fixed part and second roller fixed part during rolling and being connected with the first roller fixed part and second roller fixed part;Two rollers respectively fixed on the first roller fixed part and second roller fixed part are driven and cooperated with each other.The present application has the effect that the radial adjustment of roller does not cause the change of horizontal rolling line and vertical rolling line, greatly reduces the workload of replacement and commissioning after grinding roller, prolongs the service life of roller under normal temperature condition by grinding and radial adjustment, and significantly reduces production and maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of rolling forming equipment for rotating parts, and particularly to a room temperature skew rolling mill for rolling elements. Background Technology

[0002] To date, there are no skew rolling mills in the rolling element industry for room temperature or medium temperature rolling of rolling element blanks. The production of medium and small blanks in the rolling element manufacturing industry has always relied on equipment such as steel ball cold heading machines and roller cold heading machines. The rotational and linear motion of cold heading machines involves sliding friction, requiring a dedicated oil pump to supply cold heading oil during operation. The pollution caused by cold heading oil to the working environment is a major problem in the rolling element manufacturing industry. Furthermore, it directly or indirectly generates nearly ten thousand tons of hazardous solid waste containing mineral oil each year.

[0003] Processing steel into rolling elements at room temperature using a skew rolling mill avoids the use of large amounts of cold heading oil. At the same time, the production efficiency of the rolling process is several times that of the cold heading process, enabling efficient and environmentally friendly production of rolling element blanks.

[0004] However, because the hardness and yield strength of steel at room temperature are much higher than those at high temperature and red heat, especially alloy steel used to make bearing needle rollers and ball bearings, the hardness and yield strength are even higher than those of general carbon steel, making room temperature processing particularly difficult. The main problem is that the wear of the rolls is very large during the cold rolling experimental production of rolling elements, and the wear of the rolls also causes the dimensional error of the parts to increase.

[0005] A further problem is the frequent grinding and disassembly due to high roll wear. However, the existing skew mill structure suffers from a huge workload of readjustment and testing after roll replacement due to wear. Firstly, in the existing machine tool-type skew mill structure, the rolls become smaller after reinstallation and grinding. Due to the support structure with one fixed end and one adjustable end, the vertical rolling line (the vertical line passing through the center of the rolling element during processing) shifts, requiring readjustment of related feed limit structures. This results in a large workload for replacement, adjustment, and testing, leading to low utilization rate and high production and maintenance costs, making it unsuitable for practical application. Secondly, another problem with clamp-type skew mills is that, because the rolls on both sides are fixed to mutually hinged supports, the dimensional changes caused by roll wear and repair lead to downward movement of the horizontal rolling line (the horizontal line passing through the center of the rolling element during processing). This also requires readjustment of related feed limit structures, again resulting in a huge workload for replacement, adjustment, and testing, leading to low utilization rate and high production and maintenance costs, making it unsuitable for practical application. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of the huge workload of readjusting and testing the skew rolling mill caused by the need to repair and replace worn rolls.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] A rolling element room temperature skew rolling mill includes: a guide rail pair, a first roll fixing part that can slide on the guide rail pair, a second roll fixing part that can slide on the guide rail pair, a synchronous screw pair that is installed parallel to the guide rail pair for driving the first roll fixing part and the second roll fixing part to achieve symmetrical synchronous separation or closing action, and a positioning device connected to the first roll fixing part and the second roll fixing part for limiting the position movement of the first roll fixing part and the second roll fixing part during rolling; two rolls are fixed on the first roll fixing part and the second roll fixing part respectively.

[0009] Preferably, the guide rail pair includes a guide rail and a first slider and a second slider slidably mounted on the guide rail; the first slider is connected to the first roll fixing part, and the second slider is connected to the second roll fixing part.

[0010] Preferably, the synchronous lead screw pair includes a first lead screw and a second lead screw with opposite rotation directions, a first lead screw nut mounted on the first lead screw, a second lead screw nut mounted on the second lead screw, and a synchronization mechanism; the first lead screw and the second lead screw are connected to each other through the synchronization mechanism; the first lead screw nut is connected to the first roll fixing part, and the second lead screw nut is connected to the second roll fixing part.

[0011] Preferably, the number of guide rail pairs is two sets.

[0012] Preferably, the synchronization mechanism includes a mechanical connector or an electrically controlled synchronization mechanism.

[0013] Preferably, the mechanical connector includes a connecting plate; one end of the connecting plate is connected to a first lead screw, and the other end is connected to a second lead screw, and the first lead screw and the second lead screw are coaxially and symmetrically arranged on both sides of the connecting plate.

[0014] Preferably, the electronically controlled synchronization mechanism includes: a first electronically controlled driver connected to the first lead screw; a second electronically controlled driver connected to the second lead screw; and an electronically controlled synchronizer connected to the first electronically controlled driver and the second electronically controlled driver respectively and providing synchronous electronically controlled signals.

[0015] Preferably, the first roll fixing part includes an L-shaped bent plate.

[0016] Preferably, the second roll fixing part includes an L-shaped bent plate.

[0017] Preferably, the positioning device includes a preloading system that connects and fixes the first roll fixing part and the second roll fixing part, a locking rod that connects and fixes the first roll fixing part and the second roll fixing part, and a locking device that fixes the first roll fixing part and the second roll fixing part.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. A rolling element room temperature skew rolling mill, characterized in that it comprises: a guide rail pair, a first roll fixing part that can slide on the guide rail pair, a second roll fixing part that can slide on the guide rail pair, a synchronous screw pair installed parallel to the guide rail pair for driving the first roll fixing part and the second roll fixing part to achieve symmetrical synchronous separation or closing action, and a positioning device connected to the first roll fixing part and the second roll fixing part for limiting the position movement of the first roll fixing part and the second roll fixing part during rolling; two mutually cooperating and driven rolls are respectively fixed on the first roll fixing part and the second roll fixing part.

[0020] This invention achieves the effect that radial adjustment of the rolls will not cause changes in the horizontal rolling line by fixing the first and second roll fixing parts to the guide rails via sliders. The invention also achieves the beneficial technical effect that the symmetry center between the first and second roll fixing parts remains unchanged by driving the first and second roll fixing parts with a synchronous screw pair. In other words, changes in roll size and replacement will not affect the vertical rolling line. Furthermore, the guide rail pair and synchronous screw pair enable a wide range of roll spacing adjustments. Roll grinding and maintenance can significantly extend the service life of the rolls under normal temperature rolling conditions, thereby significantly reducing production and maintenance costs.

[0021] 2. The present invention achieves the beneficial effects of high structural strength and good stability by adopting an L-shaped bent plate structure for the first roll fixing part and the second roll fixing part.

[0022] 3. The present invention generates an outward force between the first roll fixing part and the second roll fixing part by setting a preloading system, and generates an inward force through the locking rod. The locking force of the locking rod is balanced with the reaction force generated by the preload, thereby avoiding the impact of locking and preloading on the roll position. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention from the right side.

[0024] Figure 2 This is a three-dimensional structural diagram of the present invention from the rear left side direction;

[0025] Figure 3 This is a schematic cross-sectional view of the structure of the present invention from the rear left side.

[0026] Figure 4 This is an exploded structural diagram of some components of the present invention;

[0027] Wherein: 1-guide rail pair, 10-guide rail, 11-first slider, 12-second slider, 2-synchronous lead screw pair, 21-first lead screw, 22-second lead screw, 23-first lead screw nut, 24-second lead screw nut, 3-synchronous mechanism, 4-first roll fixing part, 5-second roll fixing part, 6-locking device, 7-main box, 8-preloading system, 9-locking rod, 30-feeding system. Detailed Implementation

[0028] The equipment disclosed in this invention enables metal bars with a diameter of 9.60 mm or less to undergo plastic deformation of their transverse and longitudinal sections at room temperature or medium temperature (450-600 degrees Celsius) and ultimately be processed into the desired rolling elements. It requires only water cooling, eliminates the need for cold heading oil lubrication, and avoids the generation of large amounts of waste oil requiring environmental treatment. This invention provides the rolling element manufacturing industry with a green, efficient, and economical new type of billet preparation equipment. Because the plastic deformation of the metal bar is completed between two spiral rollers, it is called a room temperature skew rolling mill for rolling elements. Rolling elements generally refer to steel balls (steel beads), needle rollers, cylinders, rollers, etc.

[0029] A rolling element room temperature skew rolling mill, such as Figure 1-4 As shown, it includes: a guide rail pair 1, a first roll fixing part 4 that can slide on the guide rail pair 1, a second roll fixing part 5 that can slide on the guide rail pair 1, a synchronous screw pair 2 that is installed parallel to the guide rail pair 1 for driving the first roll fixing part 4 and the second roll fixing part 5 to achieve symmetrical synchronous separation or closing action, and a positioning device connected to the first roll fixing part 4 and the second roll fixing part 5 for limiting the position movement of the first roll fixing part 4 and the second roll fixing part 5 during rolling; two rolls are fixed on the first roll fixing part 4 and the second roll fixing part 5 respectively.

[0030] The guide rail pair 1 includes a guide rail 10 and a first slider 11 and a second slider 12 slidably mounted on the guide rail;

[0031] Synchronous lead screw pair 2 includes a first lead screw 21 and a second lead screw 22 that are installed parallel to the guide rail 10 and have opposite rotation directions, a first lead screw nut 23 installed on the first lead screw 21, and a second lead screw nut 24 installed on the second lead screw 22; the first lead screw 21 and the second lead screw 22 are connected by a synchronization mechanism 3.

[0032] The first roll fixing part 4 is fixedly installed on the first slider 11 and connected to the first lead screw nut 23. There is a locking device 6 between it and the guide rail 10.

[0033] The second roll fixing part 5 is symmetrically arranged with the first roll fixing part 4. It is fixedly installed on the second slider 12 and connected to the second lead screw nut 24. There is a locking device 6 between it and the guide rail.

[0034] The rolling element room temperature skew rolling mill includes: a main housing 7, and two sets of guide rail pairs 1, a synchronous screw pair 2, a synchronous mechanism 3, a first roll fixing part 4, a second roll fixing part 5, a preloading system 8, a locking rod 9, a locking device 6 for locking and fixing the first roll fixing part 4 or the second roll fixing part 5, a feeding system 30, a first roll shaft assembly, a second roll shaft assembly, a transfer gearbox, and a power system that provides power.

[0035] To clearly describe the spatial positions of each system and assembly constituting the room temperature skew rolling mill, the upper plane of the main housing 7 (hereinafter referred to as the upper plane) is defined as the foundation surface of the room temperature skew rolling mill. The upper plane is horizontal. The longitudinal centerline of the circular cross-section metal straight rolled material (hereinafter referred to as the rolled material) is parallel to the upper plane. The longitudinal centerline of the rolled material is defined as the longitudinal centerline based on the design of the room temperature skew rolling mill. The centerline between two parallel linear guides installed on the upper plane and perpendicular to the longitudinal centerline is defined as the transverse centerline based on the design of the room temperature skew rolling mill. The transverse centerline is parallel to the upper plane. Figure 1 The transverse centerline is represented by X, and the longitudinal centerline by Y. The side of the main housing 7 that is perpendicular to and closest to the longitudinal centerline is the front, and the side farther away is the rear; the feed end is the front. The front is divided into left and right directions when viewed directly.

[0036] Another point to clarify is that the terms "first," "second," or English letters used in the names of components in this article are only used to distinguish similar components in different locations and do not have any special meaning or form a specific correspondence. When "first roll fixing part 4" or "second roll fixing part 5" is mentioned, it refers to the individual components respectively. When described as "roll fixing part," it refers to the collective term for "first roll fixing part 4" and "second roll fixing part 5." Similarly, other components are referred to in the same way, with both individual and collective references. This clarification is provided to prevent misunderstanding.

[0037] The radial adjustment of the rolls mentioned above refers to the parallel movement of the first roll fixing part 4 and the second roll fixing part 5 along the guide rail 10.

[0038] The power system includes a main motor for providing power, a speed reducer, and a belt drive assembly connected to the transfer case gearbox. The belt drive assembly uses a V-belt pulley to drive the input gear of the transfer case gearbox, which in turn drives two output gears to rotate synchronously. The longitudinal centerline of the output shaft system of the two synchronous gears is parallel to the longitudinal centerline on which the room temperature skew rolling mill is designed.

[0039] The main housing 7 is a cubic box structure, with a cooling water tank on one side and the main motor and reducer on the other side. An outlet trough (not shown in the figure) for the rolling blank is located on top of the cooling water tank. A cooling water circulation pump (not shown in the figure) is installed on the outer side of the main housing 7 to transport the cooling water from the tank to the rolls for cooling. Water flowing down from the rolls is filtered and then flows back into the cooling water tank.

[0040] like Figure 1 and Figure 4 As shown, the guide rail pair 1 adopts a rolling (or sliding) linear guide rail, comprising a guide rail 10, a first slider 11 (or a sliding plate), and a second slider 12 (or a sliding plate). The center lines of the two linear guide rails 10 are equidistant from and parallel to the transverse center line based on the design of the room temperature skew rolling mill. It is fixed to the upper surface of the main housing 7 with screws (or integrated with the main housing). The first connecting plate and the two first sliders 11 (or sliding plates) are fixed together with screws, and the first roll fixing part 4 is installed on the first connecting plate; similarly, the second connecting plate and the two second sliders 12 (or sliding plates) are fixed together with screws, and the second roll fixing part 5 is installed on this connecting plate.

[0041] The first roll fixing part 4 and the second roll fixing part 5 adopt an L-shaped bent plate structure. Its bottom surface is used to fix and connect with the first or second connecting plate, and its vertical surface is used to install the roll shaft assembly, the preloading system 8, the locking tie rod 9 and the feeding system 30. The L-shaped bent plate structure has good stability and structural strength, and also facilitates the installation and adjustment of components.

[0042] Synchronous lead screw pair 2 Figure 3As shown, the longitudinal centerlines of the first lead screw 21 and the second lead screw 22, which are coaxially and symmetrically installed, lie in the same plane perpendicular to the upper plane as the transverse centerline based on the design of the room temperature skew rolling mill. The first lead screw nut 23 is fixed to the first connecting plate with screws, and the second lead screw nut 24 is fixed to the second connecting plate with screws. The first lead screw 21 and the second lead screw 22 are connected by a synchronization mechanism 3 to maintain synchronous rotation. The synchronization mechanism 3 adopts a simple and reliable connecting plate. The first lead screw 21 or the second lead screw 22 is connected to the connecting plate as a whole by screws and a flat key. The inner hole of the connecting plate has a flat key. The two connecting plates are fastened together with screws. One outer end of the first lead screw 21 or the second lead screw 22 is installed in a fixed seat. The fixed seats at both ends are fixed to the upper plane of the main housing with screws. This achieves the goal of rotating the two lead screws with different directions of rotation together, regardless of whether the left-hand or right-hand lead screw is rotated. This achieves the goal of the first roll fixing part 4 and the second roll fixing part 5, which are fixed on the linear guide rail, being able to separate or close synchronously.

[0043] In addition to performing the radial distance adjustment function between the rolls, the first roll fixing part 4 and the second roll fixing part 5, which are installed on the upper plane of the main housing 7, can also perform the function of adjusting the radial distance between the rolls. The first roll shaft assembly is installed on the L-shaped curved plate vertical surface of the first roll fixing part 4; the second roll shaft assembly is installed on the L-shaped curved plate vertical surface of the second roll fixing part 5.

[0044] The feeding system 30 includes an upper guide plate assembly, a lower guide plate assembly, and a feeding conduit assembly. The upper guide plate assembly is installed at the midpoint of the top of the first roll fixing part 4 and the second roll fixing part 5. The lower guide plate assembly is mounted on the upper surface of the main housing 7 via a bridge-type base. The feeding conduit assembly is connected and fixed to the sides of the first roll fixing part 4 and the second roll fixing part 5 via elongated holes and screws passing through the elongated holes. The elongated holes are used to meet the movement displacement requirements of the first roll fixing part 4 and the second roll fixing part 5. Replacement parts with different inner diameters are available for the feeding conduit to accommodate rolling materials of different diameters for producing rolling element parts of different diameters.

[0045] The longitudinal centerlines of the upper guide plate assembly and the lower guide plate assembly are in the same plane perpendicular to the upper plane as the longitudinal centerline on which the room temperature skew rolling mill design is based.

[0046] Two synchronously separating or closing (synchronously separating or closing) first roll fixing parts 4 and second roll fixing parts 5, installed on the upper plane of the main housing 7, realize the radial adjustment of the rolls. The roll material used in this room temperature skew rolling mill is made of high-speed tool steel or cemented carbide. The initial diameter of the rolls is selected between 140-150 mm. After the rolls wear out during operation, they can be repaired and reused. They can be repaired until the diameter is about 120 mm. In this way, the cost of producing rolling material blanks using the room temperature skew rolling process can be reduced due to the reuse of rolls. Therefore, the radial adjustment function of the rolls in this room temperature skew rolling mill is essential. Moreover, the biggest feature of this system is that the radial adjustment of the rolls will not cause a change in the center of the rolling material (the intersection of the horizontal and vertical rolling lines), thus greatly simplifying the adjustment and trial process after roll replacement, making the room temperature cold rolling process practical.

[0047] There are four sets of locking devices 6, respectively installed on both sides of the first roll fixing part 4 or the second roll fixing part 5, for limiting and fixing the first roll fixing part 4 and the second roll fixing part 5 after adjustment. The locking device 6 includes T-nuts and fastening bolts fixed on both sides of the roll fixing part, and a T-slot fixed on the upper plane of the main housing 7; the T-nuts are movably installed in the T-slots. When the fastening bolts are tightened, the T-nuts and T-slots press against each other to achieve the locking function of the roll fixing part, thereby counteracting the rotational torque caused by the rolling force on the linear guide pair. The T-nuts can move linearly within the T-slots to meet the distance adjustment requirements of the first roll fixing part 4 and the second roll fixing part 5. (See attached diagram) Figure 1 As shown.

[0048] The first or second roll shaft assembly includes a roll, a primary roll shaft connected to the roll, a universal joint A connected to the primary roll shaft, and a drive shaft connected to the universal joint A, and a universal joint B connecting the drive shaft to the output shaft of the transfer gearbox.

[0049] like Figure 1 and Figure 2 As shown, the first roll shaft assembly, in the form of a simply supported beam, is mounted on the L-shaped bend plate elevation of the first roll fixing part 4, and the second roll shaft assembly is mounted on the L-shaped bend plate elevation of the second roll fixing part 5. The drive shaft connection end in the roll shaft assembly has a connecting flange and is connected to the output shaft of the transfer gearbox via a cross-shaft universal coupling.

[0050] The transfer case gearbox is mounted on the upper plane of the main housing and includes a gearbox body, a main gear shaft mounted on the gearbox body and connected to the output shaft of the power system, two synchronous gear shafts respectively connected to the drive shafts of the first and second roll shaft assemblies, a drive gear mounted on the main gear shaft, and synchronous gears mounted on the two synchronous gear shafts and meshing with the drive gear. The output ends of the two synchronous gear shafts of the gearbox are respectively connected to the first and second roll shaft assemblies. The input gear in the gearbox simultaneously drives the driven gears on the two output shafts to rotate synchronously. The universal joint flanges of the cross shaft and the flanges of the output gear shafts, as well as the flanges of the left and right roll shafts, are connected by screws and locating keys. The shortest possible gear chain minimizes gear motion errors. These measures ensure the synchronous rotation accuracy of the rolls.

[0051] like Figure 1 and Figure 2 As shown, the locking rod 9 is a long bolt that passes through the first roll fixing part 4 and the second roll fixing part 5, along with a flat washer, a spring washer, and multiple nuts that cooperate with the long bolt. Its function is to lock the first roll fixing part 4 and the second roll fixing part 5, preventing their positions from shifting outwards.

[0052] like Figure 3 As shown, the preloading system 8 is installed between the first roll fixing part 4 and the second roll fixing part 5. Tightening the locking nut generates an outward force between the preloading system and the first roll fixing part 4 and the second roll fixing part 5. This outward force balances the locking force of the locking rod 9, eliminating the force exerted by the locking rod 9 on the roll and the radially adjusting ball screw pair in the first roll fixing part 4 and the second roll fixing part 5.

[0053] The preloading system 8 consists of a lead screw, a locking nut, a preload sleeve, an adjusting washer, and a gasket. The lead screw is placed in the U-shaped groove at the top of the left and right L-shaped curved plates. The remaining parts are assembled onto the lead screw.

[0054] After the radial adjustment of the rolls in the room temperature skew rolling mill is completed, tighten the locking nut of the preloading system 8. The preloading system 8 generates an outward force between the first roll fixing part 4 and the second roll fixing part 5. Then tighten the nut of the locking rod 9. The locking force of the locking rod 9 is balanced with the reaction force generated by the preloading system 8. This ensures that the nut of the locking rod 9 has sufficient locking force and avoids the locking force of the locking rod 9 being applied to the rolls or the radial adjustment ball screw pair of the first roll fixing part 4 and the second roll fixing part 5.

[0055] The above achieves the following: the radial adjustment of the rolls will not cause a change in the fixed center of the rolled material. The rolling (or sliding) linear guide support blocks in the first roll fixing part 4 and the second roll fixing part 5, and the preloading system 8, are all beneficial to the stability of the operation of the first roll fixing part 4 and the second roll fixing part 5. The two-shaft synchronous output gearbox and the cross-shaft universal coupling connecting the two gear output shaft systems and the left and right roll shaft systems ensure the synchronous rotation accuracy of the left and right roll shaft systems.

[0056] The above system components fully meet the requirements for rolling rolling element blanks.

[0057] Two identical spiral rolls, with the same die shape and rotating synchronously in the same direction, are mounted on the roll system. These rolls roll a straight metal bar with a circular cross-section into a rolling blank with the same shape and size as the spiral die. Upper and lower guide plates confine the rolled material to the horizontal center position of the rolls, ensuring the rolled material remains within the rolls' reasonable deformation range.

[0058] The room temperature skew rolling mill prototype described in this application has been completed, and the trial rolling of 3.30mm diameter steel ball billets has been successful. The initial production efficiency is 900 balls per minute. This efficiency is four times that of ordinary cold heading mills for steel balls currently used in the rolling element industry. The room temperature skew rolling mill described in this invention solves the problem of high roll wear leading to large workloads in repair, replacement, and trial runs, and is the first in the rolling element production industry to achieve high-efficiency, continuous room temperature rolling production of rolling element billets.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A rolling element room temperature skew rolling mill, characterized in that, include: The system includes a guide rail pair (1), a first roll fixing part (4) mounted on the guide rail pair (1) and a second roll fixing part (5) mounted on the guide rail pair (1), a synchronous screw pair (2) mounted parallel to the guide rail pair (1) for driving the first roll fixing part (4) and the second roll fixing part (5) to achieve symmetrical synchronous separation or closing action, and a positioning device connected to the first roll fixing part (4) and the second roll fixing part (5) for limiting the position movement of the first roll fixing part (4) and the second roll fixing part (5) during rolling; two rolls are fixed on the first roll fixing part (4) and the second roll fixing part (5) respectively. The guide rail pair (1) includes a guide rail (10) and a first slider (11) and a second slider (12) slidably mounted on the guide rail (10); the first slider (11) is connected to the first roll fixing part (4), and the second slider (12) is connected to the second roll fixing part (5); The positioning device includes a preloading system (8) that connects and fixes the first roll fixing part (4) and the second roll fixing part (5), a locking rod (9) that connects and fixes the first roll fixing part (4) and the second roll fixing part (5), and a locking device (6) that fixes the first roll fixing part (4) and the second roll fixing part (5). The preloading system (8) includes a lead screw, a lock nut, a preload sleeve, an adjusting washer, and a gasket; The preloading system generates an outward force between the first roll fixing part (4) and the second roll fixing part (5), which is balanced by the locking force of the locking lever (9).

2. The rolling element room temperature skew rolling mill as described in claim 1, characterized in that, The synchronous lead screw pair (2) includes a first lead screw (21) and a second lead screw (22) with opposite rotation directions, a first lead screw nut (23) mounted on the first lead screw (21), a second lead screw nut (24) mounted on the second lead screw (22), and a synchronous mechanism (3); the first lead screw (21) and the second lead screw (22) are connected by the synchronous mechanism (3); the first lead screw nut (23) is connected to the first roll fixing part (4), and the second lead screw nut (24) is connected to the second roll fixing part (5).

3. A room temperature skew rolling mill for rolling elements as described in claim 1, characterized in that, The number of guide rail pairs (1) is two sets.

4. A room temperature skew rolling mill for rolling elements as described in claim 2, characterized in that, The synchronization mechanism (3) includes a mechanical connector or an electronically controlled synchronization mechanism.

5. A room temperature skew rolling mill for rolling elements as described in claim 4, characterized in that, The mechanical connector includes a connecting plate; one end of the connecting plate is connected to a first lead screw (21), and the other end is connected to a second lead screw (22), and the first lead screw (21) and the second lead screw (22) are coaxially and symmetrically arranged on both sides of the connecting plate.

6. A rolling element room temperature skew rolling mill as described in claim 4, characterized in that, The electronic control synchronization mechanism includes: a first electronic control driver connected to the first lead screw (21); a second electronic control driver connected to the second lead screw (22); and an electronic control synchronizer connected to the first electronic control driver and the second electronic control driver respectively and providing synchronous electronic control signals.

7. A room temperature skew rolling mill for rolling elements as described in claim 1, characterized in that, The first roll fixing part (4) includes an L-shaped bending plate.

8. A room temperature skew rolling mill for rolling elements as described in claim 1, characterized in that, The second roll fixing part (5) includes an L-shaped bending plate.

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