Special clamp device for grinding outer circle of backing bearing outer ring

Abstract

The invention relates to a special fixture device for outer circle grinding of a backing bearing outer ring, and relates to the technical field of bearing grinding. Comprising a mandrel, an expansion sleeve, a positioning pin, an outer ring, a steel ball limiting sleeve, an expansion steel ball, a positioning block and a clamping block, the expansion sleeve is fastened to the mandrel, and an Archimedes spiral track is arranged on the outer ring of the expansion sleeve and used for supporting and driving the expansion steel ball so as to conduct radial positioning on the outer ring of the backing bearing; a pin hole is formed in the middle of the expansion sleeve; the positioning pin axially positions the outer ring through the annular groove; the tensioning steel ball is positioned in the steel ball limiting sleeve in a clearance fit manner, and the steel ball limiting sleeve is embedded in a hole of the outer ring to play a role of a retainer of the deep groove ball bearing; the positioning block is positioned on the right end face of the outer ring through a second screw, and the clamping block is installed on the left end face of the outer ring through a first screw. The expansion sleeve moves on the Archimedes spiral track through the expansion steel ball, radial positioning of an inner hole of the outer ring of the backing bearing is achieved, and precise grinding of the outer ring of the backing bearing is achieved under the action of the positioning block and the clamping block.

Description

Technical Field

[0001] The invention relates to the technical field of bearing grinding, in particular to a special clamp device for grinding the outer circle of a backing bearing outer ring. Background Art

[0002] Backing bearings are widely used in various mechanical fields, such as aerospace, automobile, machine tool, metallurgy, mining, etc. In these fields, backing bearings mainly play the role of supporting and protecting rolling or sliding bearings. Backing bearings are key components for rolling plates and transmission of multi-roll mills such as 20-roll and 18-roll mills, and their use accuracy directly affects the quality of rolled plates. Backing bearings are rolling bearings with particularly thick outer rings. When used, they are installed in groups on stationary shafts to become support rollers. Backing bearings are precision mechanical parts with very high precision requirements for their own parts. They must be accurately grouped and matched during installation to achieve the best operating function, especially the section height from the inner diameter to the outer diameter after eliminating the radial clearance. If the section height is too large, the backing bearings of the row of support rollers will be severely unevenly stressed during rolling, causing vibration and roller fatigue damage, affecting the quality of rolled plates and reducing the service life of the backing bearings. The operation of the rolling mill will cause damage to the outer diameter of the backing bearing, such as dents, flattening and cold work hardening, which requires regrinding the outer cylindrical surface of the outer ring of the backing bearing.

[0003] The most widely used grinding method at present is the grinding of the outer ring of a single backing bearing. That is, the bearing is disassembled, the rollers, inner rings and accessories are taken out, and they are marked and cleaned. After the outer ring of the bearing is ground on a grinder according to the measured dimensions, it is reassembled. In this way, the outer ring of the bearing ground has high precision and guaranteed quality, which is conducive to rolling plates with high surface quality.

[0004] Therefore, a special fixture device for grinding the outer cylindrical surface of the backing bearing outer ring with high precision and ease of use is needed. Summary of the invention

[0005] The purpose of the present invention is to address the gaps in the prior art and to provide a special clamping device for grinding the outer cylindrical surface of the outer ring of the backing bearing. The expansion sleeve moves on the Archimedean spiral track through the tensioning steel ball to achieve radial positioning of the inner hole of the outer ring of the backing bearing, and the precision grinding of the outer ring of the backing bearing is achieved under the action of the positioning block and the clamping block.

[0006] To achieve the above-mentioned purpose, the present invention provides a special fixture device for outer cylindrical grinding of the outer ring of the backing bearing, including a core shaft, an expansion sleeve, a positioning pin, an outer ring, a steel ball limit sleeve, a tensioning steel ball, a positioning block and a clamping block, the expansion sleeve is interference-fastened on the core shaft, the outer ring of the expansion sleeve is provided with an Archimedean spiral track, which is used to support and drive the tensioning steel ball to radially position the outer ring of the backing bearing; a pin hole is provided in the middle of the expansion sleeve, and the positioning pin fastened in the pin hole axially positions the outer ring through an annular groove in the middle of the outer ring; the tensioning steel ball is positioned in the steel ball limit sleeve with clearance fit, and the steel ball limit sleeve is interference-fitted and embedded in the hole of the outer ring to act as a ball bearing retainer for the tensioning steel ball; the positioning block is positioned on the right end face of the outer ring by screw two, and the clamping block is installed on the left end face of the outer ring by screw one.

[0007] Furthermore, the outer ring of the expansion sleeve is provided with two rows of evenly distributed Archimedean spiral tracks.

[0008] Furthermore, a right sealing ring is installed at the right end of the expansion sleeve, the sealing groove on the right sealing ring is aligned with the sealing groove on the outer ring, and a felt sealing ring 2 is installed in cooperation to prevent grease leakage and grinding fluid from entering; a left sealing ring is installed at the left end of the expansion sleeve, the sealing groove on the left sealing ring is aligned with the sealing groove on the outer ring, and a felt sealing ring 1 is installed in cooperation to prevent grease leakage and grinding fluid from entering.

[0009] Furthermore, it also includes a rotation limit plate and a limit threaded shaft, the rotation limit plate is fastened to the right end face of the outer ring by three screws, the rotation limit plate is provided with a rotation limit groove, the limit threaded shaft is fastened and installed on the core shaft, and one end of the limit threaded shaft is inserted into the rotation limit groove to limit the rotation angle of the core shaft.

[0010] Furthermore, a threaded hole for filling grease is provided in the middle of the outer ring, and an oil plug is detachably connected to the threaded hole.

[0011] Furthermore, it also includes a driving handle, which is installed at the right end of the core shaft and is used to manually drive the tensioning sleeve during installation so that the tensioning steel ball radially tightens the outer ring of the backing bearing, and to drive the tensioning sleeve during disassembly so that the tensioning steel ball radially loosens the outer ring of the backing bearing.

[0012] Furthermore, the left end surface of the mandrel is provided with a left center hole, and the right end surface is provided with a right center hole, which are used to fix the entire fixture on the grinding machine for grinding.

[0013] The beneficial effects of the present invention are:

[0014] In the present invention, an expansion sleeve is provided outside the core shaft, and an Archimedean spiral track is provided outside the expansion sleeve. The core shaft is rotated counterclockwise to drive the tensioning steel ball to move to the far end of the Archimedean spiral track, so that the tensioning steel ball and the inner hole of the outer ring of the backing bearing are radially positioned to clamp the inner hole of the backing bearing; by rotating the core shaft clockwise, the inner hole of the outer ring of the backing bearing is separated from the tensioning steel ball and the inner hole of the backing bearing is loosened. A positioning block is provided at the right end of the outer ring, and a clamping block is provided at the left end to achieve axial positioning and clamping of the outer ring of the backing bearing, ensuring effective grinding of the outer cylindrical surface of the outer ring of the backing bearing. A felt-shaped sealing ring 1 is provided between the left sealing retaining ring and the outer ring on both sides of the expansion sleeve, and a felt-shaped sealing ring 2 is provided between the right sealing retaining ring and the outer ring to prevent grease leakage and grinding fluid from entering, thereby avoiding the entry of dirt such as grinding fluid that affects the life of the bearing during grinding, and extending the service life of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a front view of a special fixture device for grinding the outer circle of a backing bearing.

[0016] Figure 2 This is the AA view of the structure of a special fixture device for grinding the outer cylindrical surface of the backing bearing outer ring according to the present invention.

[0017] Among them, in the figure:

[0018] 1-clamping block; 2-felt seal ring one; 3-left sealing retaining ring; 4-core shaft; 5-outer ring; 6-oil plug; 7-rotation limit plate; 8-limit threaded shaft; 9-handle; 10-right sealing retaining ring; 11-felt seal ring two; 12-positioning block; 13-positioning pin; 14-backing bearing outer ring; 15-steel ball limit sleeve; 16-tensioning steel ball; 17-tensioning sleeve; 101-left top hole; 102-right top hole; 103-annular groove; 104-pin hole; 105-Archimedes spiral track; 106-screw one; 107-screw two; 108-rotation limit groove; 109-screw three. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0022] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0023] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] like Figure 1-2As shown, the present invention provides a special fixture device for outer cylindrical grinding of the outer ring of the backing bearing, comprising a mandrel 4, an expansion sleeve 17, a positioning pin 13, an outer ring 5, a steel ball limiting sleeve 15, a tensioning steel ball 16, a positioning block 12 and a clamping block 1, wherein the expansion sleeve 17 is fastened to the mandrel 4, and an Archimedean spiral track 105 is provided on the outer ring of the expansion sleeve 17 for supporting and driving the tensioning steel ball 16 so as to radially position the outer ring 14 of the backing bearing; a pin hole 104 is provided in the middle of the expansion sleeve 17, and the positioning pin 13 which is interference-fastened in the pin hole 104 axially positions the outer ring 5 through the annular groove 103 in the middle of the outer ring 5; The tensioning steel ball 16 is positioned in the steel ball limiting sleeve 15 with clearance fit, and the steel ball limiting sleeve 15 is inserted in the hole of the outer ring 5 with interference fit and acts as a ball bearing retainer for the tensioning steel ball 16; the positioning block 12 is positioned on the right end face of the outer ring 5 by means of screw 2 107, and the clamping block 1 is installed on the left end face of the outer ring 5 by means of screw 106, and is used to clear the inner hole of the backing bearing outer ring 14 when the fixture is placed in it, and also to clamp the backing bearing outer ring 14 after tightening the screws after the fixture is placed in to prevent it from axial movement, thereby realizing axial positioning of the backing bearing outer ring 14 and making the axial positioning more reliable.

[0025] To further optimize the technical solution, the outer ring of the expansion sleeve 17 is provided with two rows of evenly distributed Archimedean spiral tracks 105 .

[0026] To further optimize the technical solution, a right sealing ring 10 is installed at the right end of the expansion sleeve 17, and the sealing groove on the right sealing ring 10 is aligned with the sealing groove on the outer ring 5, and a felt sealing ring 11 is installed in cooperation to prevent grease leakage and grinding fluid entry; a left sealing ring 3 is installed at the left end of the expansion sleeve 17, and the sealing groove on the left sealing ring 3 is aligned with the sealing groove on the outer ring 5, and a felt sealing ring 2 is installed in cooperation to prevent grease leakage and grinding fluid entry.

[0027] The present invention also includes a rotation limit plate 7 and a limit threaded shaft 8. The rotation limit plate 7 is fastened to the right end face of the outer ring 5 by screw three 109. The rotation limit plate 7 is provided with a rotation limit groove 108. The limit threaded shaft 8 is fastened and installed on the core shaft 4. One end of the limit threaded shaft 8 is inserted into the rotation limit groove 108 to limit the rotation angle of the core shaft 4 to avoid the tensioning steel ball 16 colliding with the starting step of the Archimedean spiral track 105 and damaging the tensioning steel ball 16 when the outer ring 14 of the backing bearing is radially loosened and the tensioning sleeve 17 is rotated.

[0028] To further optimize the technical solution, a threaded hole for filling grease is provided in the middle of the outer ring 5, and an oil plug 6 is detachably connected to the threaded hole to prevent the grease from flowing out and the grinding fluid from entering.

[0029] The present invention also includes a driving handle 9, which is installed at the right end of the core shaft 4 and is used to manually drive the tensioning sleeve 17 during installation so that the tensioning steel ball 16 radially tightens the backing bearing outer ring 14, and to drive the tensioning sleeve 17 during disassembly so that the tensioning steel ball 16 radially loosens the backing bearing outer ring 14. The Archimedean spiral track 105 of the tensioning sleeve 17 serves as a rolling guide for the tensioning steel ball 16, and drives the tensioning steel ball 16 to tighten the inner hole of the backing bearing outer ring 14 outward or loosen the inner hole of the backing bearing outer ring 14 inward through the rotation of the handle 9. At the same time, the handle 9 is also used to hoist the backing bearing outer ring 14 to the grinder to install the driving lever of the grinder headstock after it is positioned and installed.

[0030] To further optimize the technical solution, the left end face of the mandrel 4 is provided with a left center hole 101, and the right end face is provided with a right center hole 102, which are used to fix the entire fixture on the grinding machine for grinding.

[0031] In the present invention, an expansion sleeve is provided outside the core shaft, and an Archimedean spiral track is provided outside the expansion sleeve. The core shaft is rotated counterclockwise to drive the tensioning steel ball to move to the far end of the Archimedean spiral track, so that the tensioning steel ball and the inner hole of the outer ring of the backing bearing are radially positioned to clamp the inner hole of the backing bearing; by rotating the core shaft clockwise, the inner hole of the outer ring of the backing bearing is separated from the tensioning steel ball and the inner hole of the backing bearing is loosened. A positioning block is provided at the right end of the outer ring, and a clamping block is provided at the left end to achieve axial positioning and clamping of the outer ring of the backing bearing, ensuring effective grinding of the outer cylindrical surface of the outer ring of the backing bearing. A felt-shaped sealing ring 1 is provided between the left sealing retaining ring and the outer ring on both sides of the expansion sleeve, and a felt-shaped sealing ring 2 is provided between the right sealing retaining ring and the outer ring to prevent grease leakage and grinding fluid from entering, thereby avoiding the entry of dirt such as grinding fluid that affects the life of the bearing during grinding, and extending the service life of the fixture.

[0032] The working principle of this embodiment:

[0033] First, loosen screw 106 and rotate the clamping block 1 so that it does not hinder the fixture from being inserted into the inner hole of the backing bearing outer ring 14 , while making the right end surface of the backing bearing outer ring 14 close to the positioning block 12 .

[0034] Secondly, radial positioning is achieved by counterclockwise rotating the handle 9 installed at the right end of the mandrel 4. Axial positioning and clamping are achieved by tightening the screw 106 of the clamping block 1 installed at the left end of the outer ring 5 to axially clamp the left end face of the backing bearing outer ring 14.

[0035] Next, the fixture with the backing bearing outer ring 14 installed is hoisted onto the machine tool, and the head and tailstock centers of the machine tool support the mandrel 4 through the left center hole 101 and the right center hole 102 of the mandrel 4.

[0036] Finally, under the action of the head frame driving device, the expansion sleeve 17 is driven by the driving handle 9 to drive the tensioning steel ball 16, the outer ring 15 and the backing bearing outer ring 14 to rotate, thereby realizing the grinding of the outer cylindrical surface of the backing bearing outer ring 14.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A special fixture device for grinding the outer cylindrical surface of the backing bearing outer ring, characterized in that: The invention comprises a core shaft (4), an expansion sleeve (17), a positioning pin (13), an outer ring (5), a steel ball limiting sleeve (15), a tensioning steel ball (16), a positioning block (12) and a clamping block (1); the expansion sleeve (17) is fastened to the core shaft (4); the outer ring of the expansion sleeve (17) is provided with an Archimedean spiral track (105) for supporting and driving the tensioning steel ball (16) so as to radially position the outer ring (14) of the backing bearing; a pin hole (104) is provided in the middle of the expansion sleeve (17) and is interference fastened to the pin hole (104). The positioning pin (13) in the outer ring (5) axially positions the outer ring (5) through the annular groove (103) in the middle of the outer ring (5); the tensioning steel ball (16) is positioned in the steel ball limiting sleeve (15) with clearance fit, and the steel ball limiting sleeve (15) is inserted in the hole of the outer ring (5) with interference fit to act as a ball bearing retainer for the tensioning steel ball (16); the positioning block (12) is positioned on the right end face of the outer ring (5) by screw 2 (107), and the clamping block (1) is installed on the left end face of the outer ring (5) by screw 1 (106).

2. A special fixture device for outer cylindrical grinding of a backing bearing outer ring as claimed in claim 1, characterized in that: The outer ring of the expansion sleeve (17) is provided with two rows of evenly distributed Archimedean spiral tracks (105).

3. A special fixture device for grinding the outer cylindrical surface of the backing bearing outer ring according to claim 1 or 2, characterized in that: A right sealing ring (10) is installed at the right end of the expansion sleeve (17), and the sealing groove on the right sealing ring (10) is aligned with the sealing groove on the outer ring (5) to cooperate with the installation of a felt sealing ring 2 (11) to prevent grease leakage and grinding fluid entry; a left sealing ring (3) is installed at the left end of the expansion sleeve (17), and the sealing groove on the left sealing ring (3) is aligned with the sealing groove on the outer ring (5) to cooperate with the installation of a felt sealing ring 1 (2) to prevent grease leakage and grinding fluid entry.

4. A special fixture device for grinding the outer cylindrical surface of the backing bearing outer ring as claimed in claim 3, characterized in that: It also includes a rotation limit plate (7) and a limit threaded shaft (8), wherein the rotation limit plate (7) is fastened to the right end face of the outer ring (5) by means of a screw three (109), a rotation limit groove (108) is provided on the rotation limit plate (7), and the limit threaded shaft (8) is fastened and installed on the core shaft (4), and one end of the limit threaded shaft (8) is inserted into the rotation limit groove (108) to limit the rotation angle of the core shaft (4).

5. A special fixture device for grinding the outer cylindrical surface of the backing bearing outer ring as claimed in claim 4, characterized in that: A threaded hole for filling lubricating grease is provided in the middle of the outer ring (5), and an oil plug (6) is detachably connected to the threaded hole.

6. A special fixture device for outer cylindrical grinding of a backing bearing outer ring as claimed in claim 1, characterized in that: It also includes a driving handle (9), which is installed at the right end of the core shaft (4) and is used to manually drive the tensioning sleeve (17) during installation so that the tensioning steel ball (16) radially tightens the backing bearing outer ring (14), and to drive the tensioning sleeve (17) during disassembly so that the tensioning steel ball (16) radially loosens the backing bearing outer ring (14).

7. A special fixture device for outer cylindrical grinding of a backing bearing outer ring as claimed in claim 1, characterized in that: The left end surface of the mandrel (4) is provided with a left center hole (101), and the right end surface is provided with a right center hole (102), which are used to fix the entire fixture on a grinding machine for grinding.

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