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CN-121989129-A - Side-pushing sliding block grinding tool and machining method

CN121989129ACN 121989129 ACN121989129 ACN 121989129ACN-121989129-A

Abstract

The invention discloses a side-pushing slide block grinding tool and a processing method, wherein the tool comprises an annular piece made of a magnetizer, a through hole for adapting to a slide block blank is formed in the annular piece, a fastener is arranged on the side wall along the radial direction, and the blank is pressed by a gasket, so that the annular piece is fixed by a magnetic platform, and a stable clamping scheme is provided for a non-magnetic slide block. Furthermore, the tooling is additionally provided with the transverse positioning mandrel, and the thermal expansion coefficient of the mandrel material is controlled to be higher than that of the sliding block blank and the annular piece, so that heat generated in the grinding process can drive the mandrel to thermally expand, fit gaps are dynamically eliminated, self-tightening locking is realized, and the rigidity of a processing system is enhanced. The invention effectively solves the problems that the non-magnetic workpiece is difficult to stably fix and is easy to generate micro-motion deformation in plane grinding, and can improve the processing precision of the workpiece.

Inventors

  • MA DONGLIN

Assignees

  • 中船澄西船舶修造有限公司

Dates

Publication Date
20260508
Application Date
20260227

Claims (10)

  1. 1. The side pushing slide block grinding tooling is characterized by comprising an annular piece (1), wherein a through hole (2) is formed in the middle of the annular piece (1), the through hole (2) is matched with the outer contour of a side pushing slide block blank, the height of the annular piece (1) enables the side pushing slide block blank to expose a plane to be machined, a fastening piece (3) is arranged on the side wall of the annular piece (1) in a penetrating mode along the radial direction and located on the inner side of the through hole (2), a gasket (4) is arranged between the fastening piece (3) and the side pushing slide block blank, the annular piece (1) adopts a magnetizer, two planes which are parallel to each other are arranged at the upper end and the lower end of the annular piece (1), one of the two planes is attached to a magnetic platform, and the other plane is close to the plane to be machined.
  2. 2. Side-pushing slide grinding tooling according to claim 1, characterized in that the fastening piece (3) is a fixing bolt, and the ring-shaped piece (1) is provided with threaded holes in the wall thickness direction for adapting to the fixing bolt.
  3. 3. The side-pushing slide grinding tool according to claim 1, wherein the fastening member (3) is a pressing rod, the annular member (1) is provided with a guide hole adapted to the pressing rod in the wall thickness direction, the pressing rod is provided with a driving device outside the annular member (1), and the driving device enables the pressing rod to slide radially along the annular member (1).
  4. 4. Side-pushing slide grinding tool according to claim 1, characterized in that the ring-shaped member (1) is of a cylindrical structure, and two fastening members (3) are symmetrically arranged on the cylinder.
  5. 5. The side-pushing slide grinding tool according to claim 1, wherein the hardness of the annular piece (1) is greater than the hardness of the side-pushing slide blank by GB/T231.1 and the hardness of the pad (4) is less than or equal to 50 brinell hardness of the pad (4).
  6. 6. The side-pushing slide grinding tool according to claim 1, wherein the gasket (4) is configured as a wedge block (5) arranged along the radial direction of the annular piece (1), the end part of the fastener (3) is rotationally connected with the wedge block (5), a notch (6) adapting to the outer contour of the side-pushing slide blank is arranged on the wedge block (5), and the fastener (3) drives the wedge block (5) to press the side-pushing slide blank when the fastener (3) is screwed.
  7. 7. The side-pushing slide grinding tool according to any one of claims 1 to 6, further comprising a positioning mandrel (7), wherein the positioning mandrel (7) is matched with a matching hole in the middle of the side-pushing slide blank, and the end of the positioning mandrel (7) passes through the matching hole and abuts against the inner side wall of the annular piece (1).
  8. 8. The side-pushing slide block grinding tool according to claim 7, wherein positioning grooves (8) which are matched with the positioning core shaft (7) are respectively formed in two opposite side walls of the annular piece (1), and the positioning core shaft (7) is of an olive-shaped structure and is in interference fit with the positioning grooves (8).
  9. 9. The side-pushing slide grinding tool according to claim 7, wherein the positioning mandrel (7) has a thermal expansion coefficient > the thermal expansion coefficient of the side-pushing slide blank > the thermal expansion coefficient of the annular piece (1), and the positioning mandrel (7) absorbs grinding heat to generate thermal expansion amount during plane grinding, so that the assembly gap between the positioning mandrel and the side-pushing slide blank matching hole and/or the annular piece (1) is reduced.
  10. 10. A method of machining a side-pushing slide using the tooling of any one of claims 1 to 6, comprising the steps of: s1, providing a side pushing slide block blank, wherein the blank is roughly processed by a boring machine, and grinding allowance is reserved on one side of the blank; s2, placing the tool on a magnetic platform of a surface grinder to enable the lower plane of the tool to be attached to a workbench; s3, placing the side pushing slider blank into a through hole of the tool, placing a gasket between the side surface of the blank and the fastening piece, and screwing the fastening piece to clamp the side pushing slider blank; S4, knocking the upper surface of the side pushing slider blank to enable the lower surface of the blank to be attached to the magnetic platform; S5, starting a plane grinding device to grind the upper plane exposed by the blank; S6, in the grinding process or after grinding, placing a standard diameter ball into the inner hole of the blank and enabling the standard diameter ball to be in contact with the ground plane side, measuring the distance from the lowest point of the standard diameter ball to the ground plane by using an outside micrometer, and calculating and controlling the grinding quantity; s7, turning over the blank, repeating the steps S3 to S6, and grinding the rest plane.

Description

Side-pushing sliding block grinding tool and machining method Technical Field The invention relates to the technical field of ship side thrusters, in particular to a side thrusting slider grinding tool and a machining method. Background In the course of maintenance and manufacture of ships, the side-pushing slide block is used as an important propulsion component, and the processing precision of the side-pushing slide block is directly related to the operation efficiency and reliability of a ship propulsion system. The sliding blocks are usually made of nonmagnetic materials such as brass, are easy to wear after long-term use and need to be replaced periodically. Since spare parts are typically reserved for machining allowance, precision machining must be performed prior to installation to meet stringent design size, form and location tolerances, and surface roughness requirements. In the actual machining process, a common technical scheme is that a boring machine is adopted for rough machining, most of the allowance is removed, and then finish machining is carried out through a surface grinding machine, so that the planeness, the perpendicularity and the surface quality of a workpiece are ensured. However, since brass materials do not have magnetic permeability, they cannot be directly fixed by an electromagnetic chuck commonly used in a surface grinder, which makes high-precision surface grinding difficult. In the prior art, a non-magnetic workpiece is usually fixed by adopting a mechanical clamping or bonding mode, but the mechanical clamping is easy to generate micro-motion in the grinding process to influence the processing precision, the surface of the workpiece is scratched or deformed due to overlarge clamping force or uneven contact, and the requirement of batch or high-precision processing is not met. The tolerance of the sliding block is only 0.02mm, the flatness and perpendicularity are required to be within 0.03mm, and the surface roughness is required to reach Ra=0.8 mu m. The conventional clamping mode is difficult to meet the requirements of the precision and the surface quality while ensuring high-efficiency processing. Therefore, a tool suitable for plane grinding is urgently needed, stable fixing of a workpiece can be ensured, machining precision is not affected, and operation convenience and process adaptability are both considered. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a grinding tool. In order to achieve the above purpose, the technical scheme provided by the invention is as follows. The utility model provides a side pushing slide block abrasive machining frock, includes the annular piece, the annular piece middle part is provided with the through-hole, the through-hole adaptation the outline of side pushing slide block blank, the height of annular piece makes side pushing slide block blank exposes the plane of waiting to process, the lateral wall of annular piece is radially run through and is provided with the fastener, is located the through-hole is inboard, the fastener with be provided with the gasket between the side pushing slide block blank, the annular piece adopts the magnetizer, the upper and lower both ends of annular piece are set up into two planes that are parallel to each other, two one of them the plane is laminated with magnetic platform, another the plane is close to wait to process the plane. As a preferable technical scheme, the fastening piece is a fixing bolt, and the annular piece is provided with a threaded hole which is matched with the fixing bolt along the wall thickness direction. As the preferable technical scheme, the fastener is a pressing rod, a guide hole matched with the pressing rod is formed in the wall thickness direction of the annular piece, a driving device is arranged on the outer side of the pressing rod, and the driving device enables the pressing rod to slide along the radial direction of the annular piece. As a preferable technical scheme, the annular piece is of a cylinder structure, and two fasteners are symmetrically arranged on the cylinder. According to GB/T231.1, the hardness of the annular piece is greater than the hardness of the side pushing slide block blank and less than or equal to 50, and the hardness of the gasket is greater than the hardness of the gasket. The gasket is configured to be a wedge block radially arranged along the annular piece, the end part of the fastener is rotationally connected with the wedge block, a notch which is matched with the outer contour of the side pushing slide block blank is formed in the wedge block, and when the fastener is screwed, the fastener drives the wedge block to press the side pushing slide block blank. As the preferable technical scheme, the side pushing slide block blank comprises a side pushing slide block blank body, and is characterized by further comprising a positioning mandrel, wherein the positioning mandrel is matched