CN101992379A

CN101992379A - Method for machining lever assembly of disc brake

Info

Publication number: CN101992379A
Application number: CN2010105304024A
Authority: CN
Inventors: 鞠小平; 张伟; 丁乾; 万小民
Original assignee: 鞠小平
Current assignee: Jiangsu Hengyi Industrial Technology Co.,Ltd.
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2011-03-30
Anticipated expiration: 2030-10-29
Also published as: CN101992379B

Abstract

The invention relates to a method for machining a lever assembly of a disc brake, which comprises the following steps of: milling two end faces, chambering a hole a on the two end faces, and boring the hole a roughly and finely to ensure that the cylindricity is 0.01 millimeter; machining a spherical surface by using a forming cutter; lathing roughly, namely lathing excircles and steps at both ends of a lathe to ensure that the bounce is less than 0.1 millimeter and the axiality is 0.2 millimeter; drilling, chambering and reaming two holes c, and drilling a hole b; performing nitrocarburizing on a surface, wherein the layer depth is between 0.6 and 1.0 millimeter, and the hardness HRC is between 58 and 62; grinding the excircles at both ends to ensure the roughness of 0.8 and true position; putting a gasket and a rivet into the two holes c respectively for riveting; pressing a driving head into the hole b by using a pressing machine, wherein the axial drawing-out of the driving head is between 5 and 10 kN, and the radial shearing force is between 15 and 25 kN; and cleaning to remove burrs, and applying oil and packaging. In the method, the machining accuracy meets the design requirement, the braking performance is reliable, and the service life of products is prolonged.

Description

The processing method of disk brake lever assembly

Technical field: the present invention relates to auto parts machinery, particularly relate to the processing method of disc type brake level assembly in the auto parts machinery.

Background technology: present disk brake part processing precision does not reach requirement, and braking effect can not reach the requirement of design, and service life is short.

Summary of the invention: purpose of the present invention is exactly the processing method that a kind of disk brake lever assembly will be provided, it can overcome the existing problem of existing product, the object of the present invention is achieved like this, the processing method of disk brake lever assembly, comprise the steps: 1) boring and milling: on mill folder, mill both ends of the surface, control the workpiece length overall between the both ends of the surface, guarantee the symmetry 0.3mm of both ends of the surface and blank sphere; At platform upper support two cylindricals, adjust the back and smooth both ends of the surface with the electronics height gauge, and line, guarantee that the aperture, two ends is contour; Reaming a, thick, right boring hole a on both ends of the surface, control hole a is dark, guarantees cylindricity 0.01mm, removes the burr and the wedge angle of working position, with electronics height gauge, three-dimensional, V-block, dial gauge check; 2) mill sphere: go up anchor clamps, workpiece pressing is processed sphere with forming-tool, is controlled to cylindrical center line size, and finished surface must not have cut, aperture chamfering 1X45 °, checks with three-dimensional; 3) rough turn: go up anchor clamps, a folder one top workpiece, Che Yiduan cylindrical and step are controlled each segment length; Together with anchor clamps tune car other end cylindrical and step, control each segment length, cylindrical and end face intersection chamfering 2X45 °, guarantee to beat less than 0.1mm, axiality 0.2mm, with slide measure, three-dimensional check; 4) boring: go up drill point, workpiece pressing bores, expands, two hole c of hinge, controlling depth, 0.5X45 ° of hole c mouth chamfering, with slide measure,

Logical no-go gage check; 5) boring: go up drill point, workpiece pressing, boring b, controlling depth, 0.5X45 ° of hole b mouth chamfering used Logical no-go gage, the check of electronics height gauge; 6) charcoal nitrogen oozes altogether: surperficial charcoal nitrogen oozes altogether, layer depth 0.6-1.0mm, and hardness HRC58-62 guarantees linearity 0.03mm, cylindricity 0.03mm is with hardometer, metallographic microscope, slide measure, three-dimensional, the check of electronics height gauge; 7) mill processing: go up anchor clamps, clamping work pieces, mill two ends cylindrical is controlled length between two steps, guarantees roughness 0.8 and each position degree, with micrometer, roughmeter, slide measure, three-dimensional, the check of electronics height gauge; 8) riveting pad: go up anchor clamps, workpiece is placed on the anchor clamps, liner and rivet are put into two hole c respectively rivet, guarantee to fit closely after liner is put into hole c, range estimation does not have distortion, checks with slide measure; 9) press driving head: go up anchor clamps, workpiece is just put, driving head is pressed among the b of hole the axial dial-out 5-10KN of driving head, radially shear strength 15-25KN with press; 10) clean deburring, packing oils.Machining accuracy of the present invention reaches designing requirement, and braking ability is reliable, has prolonged the service life of product.

Description of drawings:

Fig. 1 is the front view in the structural representation of the present invention;

Fig. 2 is the left view in the structural representation of the present invention;

Fig. 3 is that Figure 1A-A is to cutaway view;

Fig. 4 is that Fig. 3 D is to view;

Fig. 5 is that Figure 1B-B is to cutaway view;

Fig. 6 is that Fig. 1 C-C is to cutaway view;

1. end face, 2. hole a, 3. sphere, 4. cylindrical, 5. step, 6. hole c, 7. hole b.

The specific embodiment: the invention will be further described below in conjunction with accompanying drawing;

The processing method of disk brake lever assembly comprises the steps: 1) boring and milling: on mill folder, mill both ends of the surface 1, the workpiece length overall of control between the both ends of the surface 1 guaranteed the symmetry 0.3mm of both ends of the surface 1 and blank sphere 3; At platform upper support two cylindricals 4, adjust the back and smooth both ends of the surface 1 with the electronics height gauge, and line, guarantee that the aperture, two ends is contour; Reaming a2, thick, right boring hole a2 on both ends of the surface 1, control hole a2 is dark, guarantees cylindricity 0.01mm, removes the burr and the wedge angle of working position, with electronics height gauge, three-dimensional, V-block, dial gauge check; 2) mill sphere: go up anchor clamps, workpiece pressing with forming-tool processing sphere 3, is controlled to cylindrical 4 center line sizes, and finished surface must not have cut, aperture chamfering 1X45 °, checks with three-dimensional; 3) rough turn: go up anchor clamps, a folder one top workpiece, Che Yiduan cylindrical 4 and step 5 are controlled each segment length; Together with anchor clamps tunes car other end cylindrical 4 and step 5, control each segment length, cylindrical 4 with end face 1 intersection chamfering 2X45 °, guarantee to beat less than 0.1mm, axiality 0.2mm, with slide measure, three-dimensional check; 4) boring: go up drill point, workpiece pressing bores, expands, two hole c6 of hinge, controlling depth, 0.5X45 ° of hole c mouth chamfering, with slide measure,

Logical no-go gage check; 5) boring: go up drill point, workpiece pressing, boring b, controlling depth, 0.5X45 ° of hole b mouth chamfering used

Logical no-go gage, the check of electronics height gauge; 6) charcoal nitrogen oozes altogether: surperficial charcoal nitrogen oozes altogether, layer depth 0.6-1.0mm, and hardness HRC58-62 guarantees linearity 0.03mm, cylindricity 0.03mm is with hardometer, metallographic microscope, slide measure, three-dimensional, the check of electronics height gauge; 7) mill processing: go up anchor clamps, clamping work pieces, mill two ends cylindrical 4 is controlled length between two steps 5, guarantees roughness 0.8 and each position degree, with micrometer, roughmeter, slide measure, three-dimensional, the check of electronics height gauge; 8) riveting pad: go up anchor clamps, workpiece is placed on the anchor clamps, liner and rivet are put into two hole c respectively rivet, guarantee to fit closely after liner is put into hole c, range estimation does not have distortion, checks with slide measure; 9) press driving head: go up anchor clamps, workpiece is just put, driving head is pressed among the b of hole the axial dial-out 5-10KN of driving head, radially shear strength 15-25KN with press; 10) clean deburring, packing oils.During concrete enforcement, with forge plant countersign blank drawing, determine the forging requirement and the roughing benchmark of blank, according to the design drawing requirement, determine that processing work selection equipment is: boring machine, milling machine, numerically controlled lathe, drilling machine, Equipment for Heating Processing, grinding machine, press process equipment; According to the process equipment of design drawing processing request and each operation, design processing scheme, the frock clamp of each operation, and determine that according to processing request and workpiece hardness the specifications and models and the design of institute's use cutter shape cutter; Ready, by above processing method processing.

Claims

1. the processing method of disk brake lever assembly comprises the steps:

1) boring and milling: on mill folder, mill both ends of the surface (1), the workpiece length overall between control both ends of the surface (1) is guaranteed the symmetry 0.3mm of both ends of the surface (1) and blank sphere (3); At platform upper support two cylindricals (4), adjust the back and smooth both ends of the surface (1) with the electronics height gauge, and line, guarantee that the aperture, two ends is contour; Go up reaming a (2), thick, right boring hole a (2) in both ends of the surface (1), control hole a (2) is dark, guarantees cylindricity 0.01mm, removes the burr and the wedge angle of working position, with electronics height gauge, three-dimensional, V-block, dial gauge check;

2) mill sphere: go up anchor clamps, workpiece pressing is processed sphere (3) with forming-tool, is controlled to cylindrical (4) center line size, and finished surface must not have cut, aperture chamfering 1X45 °, checks with three-dimensional;

3) rough turn: go up anchor clamps, a folder one top workpiece, Che Yiduan cylindrical (4) and step (5) are controlled each segment length; Together with anchor clamps tunes car other end cylindrical (4) and step (5), control each segment length, cylindrical (4) with end face (1) intersection chamfering 2X45 °, guarantee to beat less than 0.1mm, axiality 0.2mm, with slide measure, three-dimensional check;

4) boring: go up drill point, workpiece pressing bores, expands, hinge two hole c (6), controlling depth, 0.5X45 ° of hole c mouth chamfering, with slide measure,

Logical no-go gage check;

5) boring: go up drill point, workpiece pressing, boring b (7), controlling depth, 0.5X45 ° of hole b mouth chamfering used Logical no-go gage, the check of electronics height gauge;

6) charcoal nitrogen oozes altogether: surperficial charcoal nitrogen oozes altogether, layer depth 0.6-1.0mm, and hardness HRC58-62 guarantees linearity 0.03mm, cylindricity 0.03mm is with hardometer, metallographic microscope, slide measure, three-dimensional, the check of electronics height gauge;

7) mill processing: go up anchor clamps, clamping work pieces, mill two ends cylindricals (4) are controlled length between two steps (5), guarantee roughness 0.8 and each position degree, with micrometer, roughmeter, slide measure, three-dimensional, the check of electronics height gauge;

8) riveting pad: go up anchor clamps, workpiece is placed on the anchor clamps, liner and rivet are put into two hole c (6) riveted joint respectively, guarantee that liner puts into hole c (6) back and fit closely, range estimation does not have and is out of shape, and checks with slide measure;

9) press driving head: go up anchor clamps, workpiece is just put, driving head is pressed among the hole b (7) the axial dial-out 5-10KN of driving head, radially shear strength 15-25KN with press;

10) clean deburring, packing oils.