Fixture for fixing steering knuckle in machining process

Abstract

The present disclosure provides a fixture for fixing a steering knuckle in a machining process, the fixture comprises a bottom plate, wherein the bottom plate is machined with two bottom plate windows that are configured to accommodate machined parts of the steering knuckle; three groups of pressure claws and three groups of locating pins are fixed on the bottom plate, and the pressure claws and the locating pins are respectively fixed to the through holes of the bottom plate; and the three groups of pressure claws are respectively arranged at three vertexes of a triangle.

Claims

1. A fixture for fixing a steering knuckle in a machining process, comprising a bottom plate, wherein the bottom plate is machined with two bottom plate windows that are configured to accommodate machined parts of the steering knuckle; three groups of pressure claws and three groups of locating pins are fixed on the bottom plate, and the three groups of pressure claws and the three groups of locating pins are respectively fixed to through holes of the bottom plate; and the three groups of pressure claws are respectively arranged at three vertexes of a triangle, the fixture comprises a first locating pin of the three groups of locating pins, a first pressure claw of the three groups of pressure claws, a first floating locating pin, an eccentric column, a second locating pin of the three groups of locating pins, a second pressure claw of the three groups of pressure claws, a first card slot, a third pressure claw of the three groups of pressure claws, a locating block, a third locating pin of the three groups of locating pins, a second floating locating pin, a first pressure claw substrate, a first bottom plate window of the two bottom plate windows, a second bottom plate window of the two bottom plate windows, a second pressure claw substrate, a first locating pin base, a third pressure claw substrate and a second locating pin base; the fixture is characterized in that the bottom plate is machined with the first bottom plate window and the second bottom plate window that are configured to accommodate a machined area of the steering knuckle; the first locating pin, the second locating pin and the third locating pin are assembled to the through holes of the bottom plate by an interference assembly; the first pressure claw substrate, the second pressure claw substrate, the first locating pin base, the third pressure claw substrate and the second locating pin base are connected with the bottom plate by bolts, and a spring is assembled below the first locating pin base and the second locating pin base; the first pressure claw, the second pressure claw and the third pressure claw are respectively connected with the first pressure claw substrate, the second pressure claw substrate and the third pressure claw substrate through rotating shafts; the eccentric column is in interference fit with the bottom plate; two through holes in the locating block are strip-shaped, the locating block is mounted on the bottom plate through two bolts, and the locating block is configured to move in a long axis direction of the strip-shaped through holes.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The embodiments of the present disclosure will be described in detail below in combination with the accompanying drawings, in which:

(2) FIG. 1 is a front view of a steering knuckle machining fixture according to the present disclosure;

(3) FIG. 2 is a top view of the steering knuckle machining fixture according to the present disclosure;

(4) FIG. 3 is a left view of the steering knuckle machining fixture according to the present disclosure;

(5) FIG. 4A and FIG. 4B are schematic diagrams of an eccentric column of the steering knuckle machining fixture according to the present disclosure, in which FIG. 4A is a side view, and FIG. 4B is a top view;

(6) FIG. 5 is a front view showing that the steering knuckle machining fixture according to the present disclosure clamps a workpiece;

LIST OF REFERENCE SYMBOLS

(7) 1bottom plate, 2fixing plate, 3bolt, 4motor, 5eccentric column, 6locating pin Z2, 7pressure claw Z2, 8card slot Z2, 9pressure claw Z3, 10locating block, 11locating pin Z3, 12floating locating pin ZR, 13pressure claw substrate Z2, 14bottom plate window I, 15bottom plate window II, 16pressure claw substrate Z1, 17locating pin base ZXY, 18pressure claw substrate Z3, 19locating pin base ZR, 20strip-shaped through hole.

DETAILED DESCRIPTION

First Embodiment

(8) The specific embodiments of the present disclosure will be further described in detail below in combination with the accompanying drawings.

(9) In one aspect of the present disclosure, provided is a steering knuckle machining fixture. The fixture is characterized by being composed of a bottom plate (1), a locating pin Z1 (2), a pressure claw Z1 (3), a floating locating pin ZXY (4), an eccentric column (5), a locating pin Z2 (6), a pressure claw Z2 (7), a card slot Z2 (8), a pressure claw Z3 (9), a locating block (10), a locating pin Z3 (11), a floating locating pin ZR (12), a pressure claw substrate Z2 (13), a bottom plate window I (14), a bottom plate window II (15), a pressure claw substrate Z1 (16), a locating pin base ZXY (17), a pressure claw substrate Z3 (18) and a locating pin base ZR (19). The bottom plate (1) is machined with special-shaped through holes, which include the bottom plate window I (14) and the bottom plate window II (15) and can completely accommodate an area to be machined; the angle between two directions of the bottom plate (1) is 60-120, preferably 105; the locating pin Z1 (2), the locating pin Z2 (6) and the locating pin Z3 (11) are assembled with the through holes in the bottom plate in interference fit; the pressure claw substrate Z2 (13), the pressure claw substrate Z1 (16), the locating pin base ZXY (17), the pressure claw substrate Z3 (18) and the locating pin base ZR (19) are connected with the bottom plate (1) by bolts, a spring is assembled below the locating pin base ZXY (17) and the locating pin base ZR (19), and the axial supporting force of the springs ensures that the floating locating pin ZXY (4) and the floating locating pin ZR (12) maintain certain supporting force while having the floating capability; the pressure claw Z1 (3), the pressure claw Z2 (7) and the pressure claw Z3 (9) are connected with the pressure claw substrate Z21 (16), the pressure claw substrate Z2 (13) and the pressure claw substrate Z3 (18) through rotating shafts; the eccentric column (5) in clearance fit with the bottom plate (1) can rotate continuously and freely; two through holes (20) in the locating block (10) are strip-shaped, the locating block (10) is mounted on the bottom plate (1) through two bolts, and the locating block (10) can move in a long axis direction of the strip-shaped through holes (20), assists in aligning the position of a steering knuckle in the fixture, and has certain error proofing capability. According to the technical solution of the present disclosure, all machined parts of the steering knuckle can be completed on one machine tool, so that the demand on machine tools is reduced, the labor cost is reduced, the labor intensity of workers is relieved, the auxiliary time is reduced, the working efficiency is improved, and the yield returns are improved.

Second Embodiment

(10) The following cutter scheme can be adopted based on the first embodiment. Totally 15 cutters are used for machining the steering knuckle. 1) a clamp mounting plane, a threaded hole end face and a central hole are roughly machined using a D25 mm diamond end milling cutter; 2) a sensor mounting plane and a flange mounting plane are machined using a D63 plane milling cutter; 3) a sensor mounting hole is machined using a chamfered hard alloy cutter D10; 4) a sensor mounting threaded hole bottom hole is machined using a chamfered hard alloy cutter D5.55; 5) a flange plane mounting threaded hole bottom hole is machined using a chamfered hard alloy step drill D5.55/D7.15; 6) threads are tapped using an M6 screw tap; 7) through holes are machined using a chamfered hard alloy drill D12; 8) a flange plane mounting bolt through hole is machined using a diamond drill D25; 9) an M14 threaded bottom hole is machined using a chamfered hard alloy step drill; 10) threads are tapped using an M14 screw tap; 11) a large arc surface is milled using a D16 ball mill; 12) an M12 threaded bottom hole is machined using a chamfered hard alloy drill D11.3; 13) threads are tapped using an M11 screw tap; 14) the central hole is precisely machined using a diamond step drill; and 15) the through holes are precisely machined using a diamond boring cutter D42.

(11) The objective of completing all machined parts of the steering knuckle by single clamping is achieved by adopting the above cutter scheme.