A guide roller for super-finishing bearing rollers

Abstract

The invention discloses a guide roller for superfinishing a bearing roller, comprising a main guide roller and an auxiliary guide roller arranged in parallel in a horizontal direction; the main guide roller is made of cast steel or cast iron, and a spiral baffle is arranged on the outer surface of the main guide roller; the auxiliary guide roller comprises a guide roller core and a guide roller shell; the guide roller core is a cylinder and is made of cast steel or cast iron; the guide roller shell is made of polymer plastic steel material and is heat-sleeved on the guide roller core; a spiral groove is arranged on the outer surface of the guide roller shell, and the pitch of the spiral groove is the same as the pitch of the spiral baffle on the outer surface of the main guide roller, and the lead angle of the spiral groove is the same as the lead angle of the spiral baffle on the outer surface of the main guide roller. The guide roller of the invention can make the roller transmission more stable and the processing positioning posture retention is good, so that higher outer cylindrical superfinishing surface quality and more stable logarithmic curve convexity modeling can be obtained; at the same time, due to the reduction of sliding wear and a certain self-compensation ability, the service life is also longer.

Description

Technical Field

[0001] The invention relates to a guide roller for superfinishing bearing rollers. Background Art

[0002] The rolling element is one of the five components of a rolling bearing (inner ring, outer ring, rolling element, cage, lubricant), and its quality will directly affect the precision and service life of the bearing. Cylindrical or tapered rollers are rolling elements in roller bearings, transmitting motion and load in the narrow space between the inner ring and the outer ring, and are key components that affect the service life of tapered roller bearings.

[0003] The final processing technology currently widely used is through-type superfinishing, which has the advantages of high production efficiency and stable roller quality. Figure 1 shown. Figure 1 The main guide roller 1 and the auxiliary guide roller 2 are both arranged horizontally and their axes are parallel to each other, and they rotate in the same direction and at a constant speed around their respective axes. The main guide roller 1 has a spiral rib 10, and the auxiliary guide roller 2 has a spiral groove 20. When the radius of the roller 3 is small, the spiral rib 10 of the main guide roller 1 can enter the spiral groove 20 of the auxiliary guide roller 2 appropriately, thereby avoiding interference between the main guide roller 1 and the auxiliary guide roller 2; in addition, the spiral groove 20 on the auxiliary guide roller 2 also helps to discharge the superfinishing liquid. The roller 3 is placed between the main guide roller 1 and the auxiliary guide roller 2. The main guide roller 1 and the auxiliary guide roller 2 are shaped to control the posture and drive the roller 3 in rotation. The main guide roller 1 with the spiral rib contacts the ball base surface of the large end of the roller 3. The spiral rib 10 drives the roller 3 to continuously penetrate the axial direction of the guide roller forward on the one hand, and can isolate two adjacent rollers 3 on the other hand, so that the roller 3 transported between the main guide roller 1 and the auxiliary guide roller 2 by the automatic loading mechanism can penetrate forward along the axial direction of the guide roller while rotating around its own axis. A row of oilstones 4 oscillates at a high frequency and a small amplitude in the longitudinal direction, and acts on the rolling surface of each roller 3 with a constant pressure, so as to realize the super-finishing processing of the rolling surface of the roller 3. The relative position relationship between the roller 3, the main guide roller 1 and the auxiliary guide roller 2 and the oilstone in the longitudinal vertical plane is shown as follows: Figure 2 shown.

[0004] Generally, the materials of the main and auxiliary guide rollers are made of cast steel or cast iron, which are mainly obtained by high-temperature melting and casting of industrial pig iron, scrap steel and other steel and alloy materials. In addition to cast iron, it also contains carbon in other cast irons in the form of graphite. If the precipitated graphite is in the form of strips, the cast iron is called gray cast iron or gray cast iron, the cast iron in the form of worms is called vermicular cast iron, the cast iron in the form of flocs is called white cast iron or code iron, and the cast iron in the form of balls is called ductile cast iron. Cast iron materials have the advantages of high strength, good wear resistance, and good friction stability. However, there are also problems such as uneven hardness of the surface material, many defects, and easy scratches on the roller surface, which affects the processing quality of the roller surface. Since the surface of the roller needs to be processed into a logarithmic curve shape through super-fine grinding technology, the surface of the main and auxiliary guide rollers also needs to be processed into a corresponding shape. At the same time, the center distance A of the main and auxiliary guide rollers 1 and 2 must be adjusted so that the center height of the roller 3 and the center height of the main and auxiliary guide rollers 1 and 2 form a certain angle θ. The surface processing shape of the main and auxiliary guide rollers and the relative position of the main and auxiliary guide rollers have a great influence on the force conditions during roller processing. If the clamping force on the roller is too large, the roller surface is easily scratched; if the clamping force is too small, the roller traction force is insufficient, and the roller is prone to slipping, stalling, and jamming, affecting the processing shape of the roller surface. In the actual adjustment process, many angles cannot be accurately measured, which makes the adjustment of the main and auxiliary guide rollers very difficult. At the same time, the main and auxiliary guide rollers will wear after working for a period of time, and the relative position relationship and the surface shape of the guide rollers will also change. Continuous adjustment is required to ensure the processing quality of the rollers. In addition, cast iron or cast steel guide rollers can only be scrapped after being worn to a certain extent. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a guide roller for superfinishing bearing rollers, which can make the roller transmission more stable and the processing positioning posture retention better, so as to obtain higher outer circle superfinishing surface quality and more stable logarithmic curve convexity shape; at the same time, due to the reduction of sliding wear and a certain self-compensation ability, its service life is also longer than that of cast iron or cast steel guide rollers.

[0006] The object of the present invention is achieved as follows: A guide roller for superfinishing a bearing roller comprises a main guide roller and an auxiliary guide roller arranged in parallel in a horizontal direction; the main guide roller is made of cast steel or cast iron, and a spiral baffle is arranged on the outer surface of the main guide roller, wherein:

[0007] The auxiliary guide roller includes a guide roller core and a guide roller shell; the guide roller core is a cylinder and is made of cast steel or cast iron; the guide roller shell is made of polymer plastic steel material and is heat-shrink-fitted onto the guide roller core; a spiral groove is provided on the outer surface of the guide roller shell, the pitch of the spiral groove is the same as the pitch of the spiral baffle on the outer surface of the main guide roller, and the rise angle of the spiral groove is the same as the rise angle of the spiral baffle on the outer surface of the main guide roller.

[0008] The guide roller used for super-finishing bearing rollers, wherein the wall thickness of the guide roller shell is 15-20 mm.

[0009] The guide roller used for superfinishing bearing rollers is characterized in that the width of the spiral groove on the outer surface of the guide roller shell is 7 mm, and the outer surface between the spiral grooves is a conical surface with a taper of 1.523°, which is smaller at the front and larger at the back.

[0010] The above-mentioned guide roller for super-finishing bearing rollers, wherein the thickness of the spiral baffle is 12 mm; the front and rear sides of the spiral baffle are respectively provided with front spiral grooves and rear spiral grooves with a width of 3 mm; the outer surface of the main guide roller between the front spiral groove and the rear spiral groove is a conical surface with a smaller front and a larger rear and a taper of 1.523°.

[0011] The guide roller for superfinishing the bearing roller of the present invention has the following characteristics:

[0012] 1) The elastic deformation of the plastic steel shell of the auxiliary guide roller ensures the smooth operation of the roller during superfinishing. At the same time, the low surface hardness and self-lubricating performance will not cause scratches on the surface of the roller;

[0013] 2) After using the auxiliary guide roller with a plastic steel shell, the distance adjustment accuracy between the main and auxiliary guide rollers is not required to be high, as long as the roller can be clamped and driven to rotate. The surface of the auxiliary guide roller is an elastic material, so under elastic deformation, the roller will not have too much clamping force between the main and auxiliary guide rollers, resulting in the roller surface being stuck or stuck, etc.;

[0014] 3) Due to the elasticity and adaptability of plastic steel, after the guide roller surface of the plastic steel shell has a certain wear, it can automatically compensate for the gap caused by wear, and there is no need for frequent adjustment; even if adjustment is made, it is just to reduce the distance between the main and auxiliary guide rollers a little bit, which is also very simple to adjust;

[0015] 4) When the surface of the guide roller of the plastic-steel shell is worn to a certain extent, the plastic-steel shell can be removed and a new plastic-steel shell can be replaced, so it has good repairability and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a side view of the guide roller of the superfinishing machine tool when machining the bearing roller;

[0017] Figure 2 It is a diagram showing the relative positions of the roller, the main roller, the auxiliary guide roller and the oilstone in the longitudinal vertical plane when the guide roller of the superfinishing grinding machine tool is processing the bearing roller;

[0018] Figure 3 It is a top view of the working state of the guide roller for super-finishing the bearing roller of the present invention;

[0019] Figure 4 It is a top view of the auxiliary guide roller in the guide roller for super-finishing the bearing roller of the present invention;

[0020] Figure 5 yes Figure 3 An enlarged view of the A part in FIG.

[0021] Figure 6 yes Figure 4 Magnified view of area B in FIG. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] See also Figures 2 to 6 The guide roller for superfinishing bearing rollers of the present invention comprises a main guide roller 1 and a secondary guide roller 2' arranged in parallel in the horizontal direction; wherein,

[0024] The main roller 1 is made of cast steel or cast iron, and a spiral baffle 10 with a thickness of 12 mm is provided on the outer surface of the main roller 1. The front and rear sides of the spiral baffle 10 are provided with a front spiral groove 11 and a rear spiral groove 12 with a width of 3 mm in correspondence; the outer surface of the main roller 1 between the front spiral groove 11 and the rear spiral groove 12 is a conical surface with a taper of 1.523°, which is smaller in the front and larger in the rear.

[0025] The auxiliary guide roller 2' comprises a guide roller core 2a and a guide roller shell 2b; the guide roller core 2a is a cylinder and is made of cast steel or cast iron; the guide roller shell 2b is in the shape of a sleeve with a wall thickness of 15 to 20 mm and is made of a polymer plastic steel material, and the polymer plastic steel material is made of high-strength engineering plastics such as polyamide, polyphenylene sulfide, and polyetheretherketone with added glass fiber reinforcement; the guide roller shell 2b is heat-shrink-fitted on the guide roller core 2a; a spiral groove 20 with a width of 7 mm is provided on the outer surface of the guide roller shell 2b, the pitch of the spiral groove 20 is the same as the pitch of the spiral baffle 10 on the outer surface of the main roller 1, and the rise angle of the spiral groove 20 is the same as the rise angle of the spiral baffle 10 on the outer surface of the main roller 1; the outer surface between the spiral grooves 20 is a conical surface with a small front and a large rear and a taper of 1.523°.

[0026] The guide roller for super-finishing the bearing roller of the present invention is made of a high-strength and wear-resistant polymer plastic steel material because the guide roller shell of the auxiliary guide roller 2' is made of a high-strength and wear-resistant polymer plastic steel material, the tensile strength of the plastic steel material exceeds 50MPa, and the tensile strength is 500kg / cm 2 Above, impact resistance exceeds 50J / m, bending modulus is 24000kg / cm 2The load deflection temperature exceeds 100°C, and it has high strength, toughness, rigidity, creep resistance, fatigue resistance, wear resistance, and excellent self-lubricating properties in a wide temperature range. The guide roller core of the auxiliary guide roller 2 is still made of cast steel, so the rigidity and bending resistance of the auxiliary guide roller 2 are still good, which can ensure the rigidity requirements of super-precision grinding.

[0027] The guide roller for superfinishing the bearing roller of the present invention has the following characteristics:

[0028] 1) The elastic deformation of the plastic steel shell of the auxiliary guide roller ensures the smooth operation of the roller during superfinishing. At the same time, the low surface hardness and self-lubricating performance will not cause scratches on the surface of the roller;

[0029] 2) After using the auxiliary guide roller with a plastic steel shell, the distance adjustment accuracy between the main and auxiliary guide rollers is not required to be high, as long as the roller can be clamped and driven to rotate. The surface of the auxiliary guide roller is an elastic material, so under elastic deformation, the roller will not have too much clamping force between the main and auxiliary guide rollers, resulting in the roller surface being stuck or stuck, etc.;

[0030] 3) Due to the elasticity and adaptability of plastic steel, after the guide roller surface of the plastic steel shell has a certain wear, it can automatically compensate for the gap caused by wear, and there is no need for frequent adjustment; even if adjustment is made, it is just to reduce the distance between the main and auxiliary guide rollers a little bit, which is also very simple to adjust;

[0031] 4) When the surface of the guide roller of the plastic-steel shell is worn to a certain extent, the plastic-steel shell can be removed and a new plastic-steel shell can be put on. It has good repairability and economic benefits.

[0032] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A guide roller for superfinishing a bearing roller, comprising a main guide roller and an auxiliary guide roller arranged in parallel in a horizontal direction; the main guide roller is made of cast steel or cast iron, and a spiral baffle is provided on the outer surface of the main guide roller, characterized in that: The thickness of the spiral baffle is 12 mm; the front side and the rear side of the spiral baffle are respectively provided with a front spiral groove and a rear spiral groove with a width of 3 mm; the outer surface of the main roller between the front spiral groove and the rear spiral groove is a conical surface with a taper of 1.523°, which is smaller at the front and larger at the rear; The auxiliary guide roller includes a guide roller core and a guide roller shell; the guide roller core is a cylinder and is made of cast steel or cast iron; the guide roller shell is made of polymer plastic steel material and is heat-shrink-fitted onto the guide roller core; the wall thickness of the guide roller shell is 15 to 20 mm; a spiral groove is provided on the outer surface of the guide roller shell, the width of the spiral groove is 7 mm, and the outer surface between the spiral grooves is a conical surface with a smaller front and a larger rear and a taper of 1.523°; the pitch of the spiral groove is the same as the pitch of the spiral baffle on the outer surface of the main roller, and the rise angle of the spiral groove is the same as the rise angle of the spiral baffle on the outer surface of the main roller.

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