CN115179071A - Fork-shaped exhaust rocker arm fixing clamp and fork-shaped exhaust rocker arm machining method - Google Patents
Fork-shaped exhaust rocker arm fixing clamp and fork-shaped exhaust rocker arm machining method Download PDFInfo
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- CN115179071A CN115179071A CN202210905776.2A CN202210905776A CN115179071A CN 115179071 A CN115179071 A CN 115179071A CN 202210905776 A CN202210905776 A CN 202210905776A CN 115179071 A CN115179071 A CN 115179071A
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- 238000003754 machining Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title description 9
- 238000003825 pressing Methods 0.000 claims abstract description 68
- 238000003672 processing method Methods 0.000 claims abstract description 9
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 238000003801 milling Methods 0.000 claims description 14
- 230000006978 adaptation Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000000725 suspension Substances 0.000 description 13
- 238000009434 installation Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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Abstract
The invention discloses a fork-shaped exhaust rocker arm fixing clamp and a fork-shaped exhaust rocker arm processing method, wherein the fork-shaped exhaust rocker arm fixing clamp comprises a base, a first limiting piece, a second limiting piece and a pressing assembly; the top surface of the base supports the rocker body; the first limiting part is fixed in the middle of the right end of the base, the front side wall of the first limiting part is a first limiting surface matched with the inner side of a first cantilever at the front side of the right end of the rocker arm body, and the rear side wall of the first limiting part is a second limiting surface matched with the inner side of a second cantilever at the rear side of the right end of the rocker arm body; the three pressing assemblies are respectively arranged in front of the first cantilever, behind the second cantilever and at the left end of the rocker body so as to press and fix the first cantilever, the second cantilever and the left part of the rocker body; the second locating part is fixedly connected with the pressing assembly arranged at the left end of the rocker arm body, and the side wall, close to the left end of the rocker arm body, of the second locating part is a third limiting surface. The clamping fixing device can realize clamping fixation of the fork-shaped exhaust rocker arm, reduces clamping times, improves machining efficiency and shortens machining period.
Description
Technical Field
The invention relates to the field of machining, in particular to a fork-shaped exhaust rocker arm fixing clamp and a fork-shaped exhaust rocker arm machining method.
Background
The exhaust rocker arm of the marine diesel engine is an important component of an exhaust system and is mainly used for controlling the opening and closing of an exhaust gas discharge port in a cylinder. The exhaust rocker arm is an important component of an exhaust system of the marine diesel engine, and is mainly used for controlling the exhaust valve to be opened and closed timely so that compressed air or combustible mixed gas is combusted in a cylinder and then is discharged out of the cylinder in time.
When a fork-shaped exhaust rocker arm is machined by the conventional machining method, generally, firstly, a scribing is carried out on a scribing platform by various auxiliary scribing tools, each machining surface and each hole machining position are scribed, and a vertical machining center is firstly machined: every product passes through the clamping of artifical alignment mode, the flange locating surface at rough machining rocking arm body middle part, then use the flange locating surface as the benchmark clamping, every product passes through another flange locating surface of artifical alignment mode rough machining once more and bore the pivot hole at rocking arm body middle part roughly, for avoiding processing to interfere, the clamp plate can only press at rocking arm body left end, the unsettled position of first cantilever and second cantilever, then the same clamping method twice of subdivision, finish mill two flange locating surfaces, because the clamp plate can only press the unsettled position at rocking arm body and cantilever, can not avoid the clamping to warp, lead to processing back two flange locating surfaces to have a little deflection. And then clamping by taking the finish-milled flange positioning surface as a reference, and finish-machining a rotating shaft hole of the rocker arm body and a concentric oil groove and an eccentric oil groove in the rotating shaft hole by each product in a manual alignment mode.
Then processing on a horizontal processing center: clamping in the horizontal plane with the flange locating surface as the benchmark, in order to avoid the clamping to warp, rocking arm body left end, first cantilever and second cantilever can only carry out unsettled processing, carry out the alignment through artifical alignment mode, then mill the downside terminal surface of the mounting pin hole of rocking arm body left part, the mounting pin hole of boring processing rocking arm body left part, mill the upside terminal surface of the adjusting screw mounting hole of first cantilever and second cantilever free end, the second oilhole of processing cantilever body left part, because unsettled processing, the rigidity is relatively poor, the processing position produces the line of shaking owing to vibrate greatly, surface quality is poor, each linear dimension and form and position precision can not satisfy the requirement.
In the prior art, workpieces are required to be clamped and processed in turn on a scribing platform, a vertical processing center and a horizontal processing center for multiple times during processing, the processing period is long, the efficiency is low, the precision requirement cannot be guaranteed, logistics and management and operation cost are additionally increased, the required clamps are large in number and type, the occupied equipment is large in number, and the production and manufacturing cost of products is high.
CN212552834U discloses a special clamp for machining a rocker arm in the field of shield tunneling machines, which comprises a clamp body, wherein a first clamping unit and a second clamping unit are arranged on the clamp body, the first clamping unit is provided with a V-shaped limiting block, and the top of the V-shaped limiting block is provided with an upper pressing block; a first lateral pressing block and a second lateral pressing block are arranged on two sides of the V-shaped limiting block; corresponding to the V-shaped limiting block, a lower positioning seat is arranged on the clamp base body, and a positioning bulge is arranged on the lower positioning seat; the second clamping unit is provided with an upper pressing assembly, a V-shaped pressing device and a lower pressing assembly. The hydraulic device and the V-shaped block are used for positioning, mounting and processing, the replacement is not needed, the geometric precision of a product can be improved, and the working efficiency is improved. However, the rocker arm in the field of shield machines in the application does not have a fork structure, the rigidity of the rocker arm is good, the self-centering property of the fork structure during clamping is not required to be considered during processing, and the problem of vibration caused by poor rigidity during processing of the exhaust rocker arm with the fork structure is not required to be considered.
Disclosure of Invention
The invention aims to provide a fork-shaped exhaust rocker arm fixing clamp and a fork-shaped exhaust rocker arm processing method, which can realize clamping and fixing of a fork-shaped exhaust rocker arm, reduce clamping times, improve processing efficiency and shorten a processing period.
The invention relates to a fork-shaped exhaust rocker arm fixing clamp which comprises a base, a first limiting piece, a second limiting piece and a pressing assembly, wherein the base is provided with a first limiting piece and a second limiting piece; the top surface of the base supports the rocker arm body, the top surface of the base is provided with at least one reference surface, and the reference surface and the axis line of the rotating shaft hole in the middle of the rocker arm body are positioned on the same plane; the first limiting part is fixed in the middle of the right end of the base, the front side wall of the first limiting part is a first limiting surface matched with the inner side of a first cantilever at the front side of the right end of the rocker arm body, and the rear side wall of the first limiting part is a second limiting surface matched with the inner side of a second cantilever at the rear side of the right end of the rocker arm body; the pressing assemblies are detachably connected with the base, and the number of the pressing assemblies is three, and the three pressing assemblies are respectively arranged in front of the first cantilever, behind the second cantilever and at the left end of the rocker body so as to press and fix the first cantilever, the second cantilever and the left part of the rocker body; the second locating part with arrange in the subassembly fixed connection that compresses tightly of rocking arm body left end, the lateral wall that the second locating part is close to rocking arm body left end is the spacing face of third.
Furthermore, single compressing assembly includes support piece, clamp plate and stud, the clamp plate middle part is equipped with first via hole, support piece lower extreme and stud lower extreme all with base threaded connection, the stud upper end is passed the first via hole on the clamp plate and is connected with fastening nut, the clamp plate both ends are pressed respectively on support piece upper end and rocking arm body.
Further, the support piece right part is equipped with sunken mount table, be equipped with on the mount table and hold first construction bolt and pass and run through the second via hole of mount table upper and lower downside, be equipped with the first mounting hole with first construction bolt looks adaptation on the base.
Furthermore, the bottom surface of the supporting piece and the top surface of the base are designed along with the shape, and the top surface of the supporting piece is flush with the upper surface of the pressing assembly with the supporting piece, which corresponds to the position of the rocker arm body.
Further, the first via hole in the middle of the pressing plate is a strip-shaped hole.
Further, the first limiting part and the base are integrally formed, and the reference surface is located on the left side of the first limiting part.
Furthermore, a plurality of second mounting holes penetrating through the upper side surface and the lower side surface of the base are formed in the middle of the base, and second mounting bolts penetrate through the second mounting holes to be fixedly connected with the workbench, so that the base is horizontally fixed; the base side is equipped with a plurality of third mounting holes that run through the base front and back sides, adopts third mounting bolt to pass third mounting hole and workstation fixed connection, realizes the vertical fixed of base.
A processing method of a fork-shaped exhaust rocker arm comprises the following steps:
s1, horizontally mounting the fork-shaped exhaust rocker arm fixing clamp on a workbench of a horizontal processing machine tool, and then clamping and pressing a fork-shaped exhaust rocker arm blank to be fixed on a base;
s2, adjusting the height of the center of a main shaft of the horizontal machining tool to be equal to the reference plane, enabling the center of the main shaft to be on the same vertical plane with the longitudinal center line of the base, milling flange positioning surfaces on the front side and the rear side of a rotating shaft hole of the rocker arm body, milling front side end faces and rear side end faces of a neck of the rocker arm body, boring a rotating shaft hole of the rocker arm body and a concentric oil groove and an eccentric oil groove in the rotating shaft hole, and machining first oil holes in the first cantilever and the second cantilever;
and S3, detaching the base with the fork-shaped exhaust rocker arm blank from the workbench, vertically installing the base on the workbench of a horizontal machining machine tool, milling the lower side end face of the installation pin hole in the left part of the rocker arm body, boring and machining the installation pin hole in the left part of the rocker arm body, milling the upper side end faces of the adjustment screw installation holes in the free ends of the first cantilever and the second cantilever, and machining a second oil hole in the left part of the rocker arm body.
Compared with the prior art, the invention has the following beneficial effects.
1. According to the self-centering clamping device, the fork-shaped exhaust rocker arm is self-centered and positioned by utilizing the first limiting piece and the second limiting piece, three strands of oblique pressing forces are formed by the pressing assemblies arranged in front of the first cantilever, behind the second cantilever and at the left end of the rocker arm body to clamp and fix the fork-shaped exhaust rocker arm, and the self-centering positioning and pressing of the fork-shaped exhaust rocker arm are realized. The clamping scheme of three-position solid support is adopted, the defect of poor processing rigidity determined by the structure of a workpiece is overcome, the clamping force on the fork-shaped exhaust rocker arm can be enhanced, and the clamping deformation of the fork-shaped exhaust rocker arm can be prevented.
2. According to the processing method of the fork-shaped exhaust rocker arm, the clamp is connected with the workbench of the horizontal processing center for installation twice according to the bottom plane and the side plane, so that the whole machining process is completed by one-time clamping and two procedures on the clamp, the product positioning reference and the product processing reference are unified, the clamping error and the deformation error are eliminated, the processing precision is high, and the requirements on the geometric dimension of each space and the tolerance precision of each form and position of the fork-shaped exhaust rocker arm are met. Meanwhile, the processing method reduces the marking process and the link of manually aligning each product on a machine tool, reduces the number of types of equipment, reduces the clamping times, improves the processing efficiency, shortens the processing period, reduces the streaming times and reduces the production cost.
Drawings
FIG. 1 is a schematic view of a fork exhaust rocker arm positioned horizontally;
FIG. 2 is a schematic view of a fork exhaust rocker arm positioned vertically;
FIG. 3 is a side view of the base of the present invention;
FIG. 4 is a top view of the base of the present invention;
FIG. 5 is a side view of the compression assembly disposed at the left end of the rocker arm body;
FIG. 6 is a top view of the compression assembly disposed at the left end of the rocker arm body;
FIG. 7 is a side view of the hold down assembly disposed forward of the first boom and rearward of the second boom;
FIG. 8 is a top view of the hold down assembly disposed forward of the first boom and rearward of the second boom;
FIG. 9 is a schematic view of the construction of the platen of the present invention;
FIG. 10 is a schematic cross-sectional view of the platen of the present invention;
FIG. 11 is a side view of the rocker arm body of the present invention;
FIG. 12 is a top view of the rocker arm body of the present invention.
In the figure, 1, a base, 11, a first mounting hole, 12, a second mounting hole, 13, a third mounting hole, 14, a fourth mounting hole, 15, a reference surface, 16, a first inclined surface and 17, a second inclined surface; 2-a first limit part, 21-a first limit surface, 22-a second limit surface; 3-a second limiting piece, 31-a third limiting surface; 4-a hold-down assembly, 41-a support, 411-a mounting table, 412-a second via hole, 413-a third slope, 414-a fourth slope, 415-a fifth slope, 416-a plane, 417-a sixth slope, 418-a seventh slope, 42-a pressure plate, 421-a first via hole, 422-an arc fitting, 43-a stud, 44-a fastening nut; 5-rocker arm body, 51-rotating shaft hole, 52-first cantilever, 53-second cantilever, 54-neck, 55-flange positioning surface, 56-first oil hole, 57-second oil hole, 58-adjusting screw rod mounting hole, 59-mounting pin hole, 510-neck positioning inclined surface, 511-cantilever positioning inclined surface, 512-neck upper end arc surface, 513-cantilever upper end inclined surface; 6-first mounting bolt, 7-second mounting bolt, 8-third mounting bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "vertical", "parallel", "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 12, the illustrated fork-shaped exhaust rocker arm fixing clamp includes a base 1, a first limiting member 2, a second limiting member 3, and a pressing member 4. The top surface of the base 1 is used for supporting the rocker arm body 5, referring to fig. 11 and 12, the rocker arm body 5 comprises a middle part, a first cantilever 52 extending from the middle part to the right front, a second cantilever 53 extending from the middle part to the right rear, and a neck 54 connected with the middle part at the right end, the left end of the neck 54 is provided with a mounting pin hole 59, and the free ends of the first cantilever 52 and the second cantilever 53 are provided with adjusting screw mounting holes 58. A rotating shaft hole 51 is formed in the middle of the rocker arm body 5, flange positioning surfaces 55 are formed in the front side surface and the rear side surface of the middle of the rocker arm body, a neck positioning inclined surface 510 is formed in the lower side of the neck 54, and an arc-shaped surface 512 at the upper end of the neck is formed in the upper side surface of the neck 54; the lower sides of the first and second cantilevers 52 and 53 are cantilever positioning slopes 511, and the upper sides of the first and second cantilevers 52 and 53 are cantilever upper end slopes 513.
The neck positioning inclined plane 510 is an inclined plane which inclines from left to right and downwards, and the upper arc-shaped surface 512 of the neck is integrally upwards convex; the cantilever positioning slope 511 is a slope inclined upward from left to right, and the cantilever upper end slope 513 is a slope inclined downward from left to right.
The first limiting part 2 is integrally formed in the middle of the right end of the base 1, the front side wall of the first limiting part 2 is a first limiting surface 21 matched with the inner side of a first cantilever 52 at the front side of the right end of the rocker arm body 5, and the rear side wall of the first limiting part 2 is a second limiting surface 22 matched with the inner side of a second cantilever 53 at the rear side of the right end of the rocker arm body 5.
The pressing components 4 are connected with the base through bolts, the number of the pressing components 4 is three, and the pressing components are respectively arranged in front of the first cantilever 52, behind the second cantilever 53 and at the left end of the rocker arm body 5 so as to press and fix the first cantilever 52, the second cantilever 53 and the left part of the rocker arm body 5.
The second locating part 3 is fixedly connected with a pressing component 4 arranged at the left end of the rocker arm body 5, and the side wall, close to the left end of the rocker arm body 5, of the second locating part 3 is a third locating surface 31.
According to the self-centering clamping device, the fork-shaped exhaust rocker arm is self-centered and positioned by the first limiting piece 2 and the second limiting piece 3, three strands of oblique pressing forces are formed by the pressing components 4 arranged in front of the first cantilever 52, behind the second cantilever 53 and at the left end of the rocker arm body 5, so that the fork-shaped exhaust rocker arm is clamped and fixed, and self-centering positioning pressing of the fork-shaped exhaust rocker arm is realized. The clamping scheme of three-position solid support is adopted, the defect of poor processing rigidity determined by the structure of a workpiece is overcome, the clamping force on the fork-shaped exhaust rocker arm can be enhanced, and the clamping deformation of the fork-shaped exhaust rocker arm can be prevented.
In order to align the base 1 and the workpiece during machining, the top surface of the base 1 is provided with a reference surface 15, and the reference surface 15 is arranged adjacent to the left side of the first limiting member 2. The datum plane 15 and the axis line of the rotating shaft hole 51 in the middle of the rocker arm body 5 are positioned on the same plane;
a single compressing assembly 4 comprises a supporting piece 41, a pressing plate 42 and a stud 43, a first through hole 421 is formed in the middle of the pressing plate 42, the lower end of the supporting piece 41 and the lower end of the stud 43 are both in threaded connection with the base 1, and a fourth mounting hole 14 matched with the stud 43 is formed in the base 1. The upper end of the stud 43 passes through the first through hole 421 on the pressing plate 42 and is connected with a fastening nut 44, and two ends of the pressing plate 42 are respectively pressed on the upper end of the supporting part 41 and the rocker arm body 5.
The first via hole 421 in the middle of the pressing plate 42 is a strip-shaped hole, so that the pressing plate 42 has a certain adjusting allowance compared with the stud 43, and the rocker arm body 5 is guaranteed to be pressed and fixed better.
The bottom surface of the supporting piece 41 is designed to follow the shape of the top surface of the base 1, and the top surface of the supporting piece 41 is flush with the upper surface of the pressing component 4 with the supporting piece 41 corresponding to the position of the rocker arm body 5. Because there is a certain difference between the top surface of the base 1 corresponding to the left end of the rocker arm body 5 and the top surfaces of the base 1 corresponding to the first suspension arm 52 and the second suspension arm 53, the shape of the supporting member 41 of the pressing assembly 4 corresponding to the left end of the rocker arm body 5 and the shape of the supporting member 41 of the pressing assembly 4 corresponding to the first suspension arm 52 and the second suspension arm 53 have a certain difference.
Referring to fig. 5 and 6, the right portion of the bottom surface of the supporting member 41 of the pressing assembly 4 corresponding to the left end of the rocker arm body 5 is a third inclined surface 413 matched with the first inclined surface 16 on the base 1, the left portion of the bottom surface of the supporting member 41 is a fourth inclined surface 414, and the fourth inclined surface 414 is higher than the third inclined surface 413 in the vertical direction and higher than the lower side end surface of the mounting pin hole 59, so that interference between a tool and the pressing assembly 4 when the mounting pin hole 59 is machined is avoided. The left part of the top surface of the supporting member 41 is provided with a plane 416, and the plane 416 is used as a reference plane for the processing of the supporting member 41 itself, so as to facilitate the rapid alignment and positioning of the supporting member 41 during the processing. Between the mounting platform 411 and the plane 416 is a fifth inclined plane 415, and the fifth inclined plane 415 is matched with the shape of an arc-shaped surface 512 at the upper end of the neck of the rocker arm body 5. When the left end of the rocker arm body 5 is pressed and fastened, one end of the pressing plate 42 is pressed on the fifth inclined surface 415 of the supporting piece 41, and the other end of the pressing plate 42 is pressed on the arc-shaped surface 512 at the upper end of the neck of the rocker arm body 5, so that the height of the pressing plate 42 from the ground in the front-back direction is basically consistent, and the pressing effect of the left end of the rocker arm body 5 is ensured. Referring to fig. 10, in order to ensure the fitting effect of the pressure plate 42 and the arc-shaped surface 512 of the upper end of the neck of the rocker arm body 5, an arc-shaped matching part 422 is arranged on the bottom surface of the pressure plate 42.
Referring to fig. 7 and 8, the bottom surface of the supporting member 41 of the pressing assembly 4 corresponding to the first and second suspension arms 52 and 53 is a sixth inclined surface 417 adapted to the second inclined surface 17 on the base 1, and the left portion of the top surface of the supporting member 41 is a seventh inclined surface 418 adapted to the shape of the inclined surface 513 on the upper end of the suspension arm. When the first suspension arm 52 or the second suspension arm 53 is pressed and fastened, one end of the pressure plate 42 presses on the seventh inclined surface 418 of the support 41, and the other end presses on the suspension arm upper end inclined surface 513 of the first suspension arm 52 or the second suspension arm 53, so that the height of the pressure plate 42 from the ground in the front-back direction is substantially consistent, and the pressing effect of the first suspension arm 52 or the second suspension arm 53 is ensured.
A processing method of a fork-shaped exhaust rocker arm comprises the following steps:
s1, referring to FIG. 1, horizontally installing the fork-shaped exhaust rocker arm fixing clamp on a workbench of a horizontal machining tool, namely, penetrating four second installation bolts 7 through second installation holes 12 on a base 1 and then connecting the four second installation bolts with the workbench through threads. Then clamping and pressing a fork-shaped exhaust rocker arm blank to be fixed on the base 1, specifically, pre-connecting a pressing component 4 at the left end of a rocker arm body 5 on a first mounting hole 11 at the left part of the base 1 by using a first mounting bolt 6, then horizontally placing the rocker arm body of the fork-shaped exhaust rocker arm blank on the mounted base 1, positioning a first limiting part 2 between a first cantilever 52 and a second cantilever 53 at the right part of the rocker arm body 5, positioning the first cantilever 52 and a first limiting surface 21 at the front side of the first limiting part 2 in an abutting mode, and positioning the second cantilever 53 and a second limiting surface 22 at the rear side of the first limiting part 2 in an abutting mode. And then the pressing component 4 at the left end of the rocker arm body 5 is adjusted by rotating around the first mounting bolt 6, so that the third limiting part 3 fixed on the pressing component 4 at the left end of the rocker arm body 5 is closely positioned with the left end of the rocker arm body 5. After the positioning is finished, the longitudinal central line X of the rocker arm body 5 coincides with the longitudinal central line M of the base 1, the transverse central line Y of the rocker arm body 5 coincides with the transverse central line N of the base 1, and the first mounting bolt 6 is locked. And then, two first mounting bolts 6 are adopted to pre-connect the pressing component 4 corresponding to the first cantilever 52 and the second cantilever 53 to the first mounting hole 11 at the right part of the base 1, and the position of the pressing component 4 is adjusted by rotating around the first mounting bolts 6, so that the first mounting bolts 6 are locked after the supporting part 41 of the pressing component 4 is basically parallel to the first cantilever 52 or the second cantilever 53.
And finally, a pressing plate 42 is installed, the lower end of the stud 43 is in threaded connection with the fourth installation hole 14 on the base 1, the upper end of the stud 43 penetrates through the first through hole 421 on the pressing plate 42 and is connected with a fastening nut 44, the fastening nut 44 is screwed, so that the two ends of the pressing plate 42 are respectively pressed on the upper end of the supporting part 41 and the rocker arm body 5, and the pressing plates 42 on the three pressing components 4 form three oblique pressing forces to clamp and fix the fork-shaped exhaust rocker arm, and the clamping is stable and free of deformation.
S2, adjusting the height of the spindle center of the horizontal machining tool to be equal to the reference surface 15, enabling the spindle center to be on the same vertical plane with the longitudinal center line M of the base 1, milling the flange positioning surfaces 55 on the front side and the rear side of the rotating shaft hole 51 of the rocker arm body 5, milling the front side end surfaces and the rear side end surfaces of the neck portion 54 of the rocker arm body 5, boring the rotating shaft hole 51 of the rocker arm body 5 and the concentric oil grooves and the eccentric oil grooves in the rotating shaft hole 51, machining the first oil hole 56 in the first cantilever 52 and the second cantilever 53, and machining the first oil hole 56 through surface milling, drilling and tapping.
And S3, removing the four second mounting bolts 7, and detaching the base 1 with the fork-shaped exhaust rocker arm blank from the workbench. Referring to fig. 2, a plurality of third mounting bolts 8 penetrate through third mounting holes 13 penetrating through the front side and the rear side of the base 1 to be fixedly connected with the workbench, so that the base 1 is vertically mounted on the workbench of the horizontal processing machine tool. The processing machine tool is debugged, so that the center of the main shaft of the horizontal processing machine tool is equal to the height of the reference surface 15, and the center of the main shaft and the longitudinal center line M of the base 1 are on the same vertical plane. Milling the lower side end face of a mounting pin hole 59 in the left part of the rocker arm body 5 after debugging is finished, boring and machining the mounting pin hole 59 in the left part of the rocker arm body 9, milling the upper side end faces of adjusting screw mounting holes 58 in the free ends of the first cantilever 52 and the second cantilever 53, machining a second oil hole 57 in the left part of the rocker arm body 5, and machining the second oil hole 57 by milling, drilling and tapping.
According to the processing method of the fork-shaped exhaust rocker arm, the clamp is connected with a workbench of a horizontal processing center for installation twice according to the bottom plane and the side plane, so that the whole machining process is completed by one-time clamping and two procedures on the clamp, the product positioning reference and the product processing reference are unified, the clamping error and the deformation error are eliminated, the processing precision is high, and the requirements on the geometric dimension of each space and the tolerance precision of each shape and position of the fork-shaped exhaust rocker arm are met. Meanwhile, the processing method reduces the marking process and the link of manually aligning each product on a machine tool, reduces the number of types of equipment, reduces the clamping times, improves the processing efficiency, shortens the processing period, reduces the streaming times and reduces the production cost.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The utility model provides a forked exhaust rocking arm mounting fixture which characterized in that: comprises a base (1), a first limit part (2), a second limit part (3) and a pressing component (4);
the top surface of the base (1) supports the rocker arm body (5), the top surface of the base (1) is provided with at least one datum plane (15), and the datum plane (15) and the axis line of a rotating shaft hole (51) in the middle of the rocker arm body (5) are positioned on the same plane;
the first limiting part (2) is fixed in the middle of the right end of the base (1), the front side wall of the first limiting part (2) is a first limiting surface (21) matched with the inner side of a first cantilever (52) at the front side of the right end of the rocker arm body (5), and the rear side wall of the first limiting part (2) is a second limiting surface (22) matched with the inner side of a second cantilever (53) at the rear side of the right end of the rocker arm body (5);
the pressing assemblies (4) are detachably connected with the base (1), the number of the pressing assemblies (4) is three, and the three pressing assemblies (4) are respectively arranged in front of the first cantilever (52), behind the second cantilever (53) and at the left end of the rocker arm body (5) so as to press and fix the first cantilever (52), the second cantilever (53) and the left part of the rocker arm body (5);
the second locating part (3) is fixedly connected with a pressing component (4) arranged at the left end of the rocker arm body (5), and the side wall, close to the left end of the rocker arm body (5), of the second locating part (3) is a third locating surface (31).
2. The fork exhaust rocker arm tie down clip of claim 1, wherein: a single compressing assembly (4) comprises a supporting piece (41), a pressing plate (42) and a stud (43), a first through hole (421) is formed in the middle of the pressing plate (42), the lower end of the supporting piece (41) and the lower end of the stud (43) are connected with the base (1) in a threaded mode, the upper end of the stud (43) penetrates through the first through hole (421) in the pressing plate (42) and is connected with a fastening nut (44), and the two ends of the pressing plate (42) are pressed on the upper end of the supporting piece (41) and the rocker arm body (5) respectively.
3. The fork exhaust rocker arm tie down clamp of claim 2, wherein: support piece (41) right part is equipped with sunken mount table (411), be equipped with on mount table (411) and hold first construction bolt (6) and pass and run through second via hole (412) of mount table (411) upper and lower downside, be equipped with on base (1) with first construction bolt (6) looks adaptation first mounting hole (11).
4. The fork exhaust rocker arm tie down clamp of claim 2, wherein: the bottom surface of the supporting piece (41) is designed to follow the shape of the top surface of the base (1), and the top surface of the supporting piece (41) is flush with the upper surface of the pressing component (4) with the supporting piece (41) corresponding to the position of the rocker arm body (5).
5. The fork exhaust rocker arm tie down clamp of claim 2, wherein: the first via hole (421) in the middle of the pressure plate (42) is a strip-shaped hole.
6. The tuning fork exhaust rocker arm fixing clamp of claim 1 or 2, wherein: the first limiting part (2) and the base (1) are integrally formed, and the reference surface (15) is located on the left side of the first limiting part (2).
7. The fork exhaust rocker arm fastening clamp of claim 1 or 2, wherein: a plurality of second mounting holes (12) penetrating through the upper side surface and the lower side surface of the base (1) are formed in the middle of the base (1), and a second mounting bolt (7) penetrates through the second mounting holes (12) to be fixedly connected with the workbench, so that the base (1) is horizontally fixed;
the base (1) side is equipped with a plurality of third mounting holes (13) that run through base (1) preceding, trailing flank, adopts third mounting bolt (8) to pass third mounting hole (13) and workstation fixed connection, realizes the vertical fixed of base (1).
8. A processing method of a fork-shaped exhaust rocker arm is characterized by comprising the following steps:
s1, horizontally mounting the fork-shaped exhaust rocker arm fixing clamp of 1~7 on a workbench of a horizontal processing machine tool, and then clamping and pressing a fork-shaped exhaust rocker arm blank onto a base (1);
s2, adjusting the height of the spindle center of the horizontal machining tool to be equal to the reference surface (15), enabling the spindle center to be on the same vertical plane with the longitudinal center line of the base (1), milling flange positioning surfaces (55) on the front side and the rear side of a rotating shaft hole (51) of the rocker arm body (5), milling front side end surfaces and rear side end surfaces of a neck (54) of the rocker arm body (5), boring concentric oil grooves and eccentric oil grooves in the rotating shaft hole (51) and the rotating shaft hole (51) of the rocker arm body (5), and machining first oil holes (56) in a first cantilever (52) and a second cantilever (53);
and S3, detaching the base (1) with the fork-shaped exhaust rocker arm blank from the workbench, vertically installing the base (1) on the workbench of a horizontal machining machine tool, milling the lower side end surface of a mounting pin hole (59) in the left part of the rocker arm body (5), boring the mounting pin hole in the left part of the rocker arm body (59), milling the upper side end surface of an adjusting screw mounting hole (58) in the free ends of the first cantilever (52) and the second cantilever (53), and machining a second oil hole (57) in the left part of the rocker arm body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210905776.2A CN115179071A (en) | 2022-07-29 | 2022-07-29 | Fork-shaped exhaust rocker arm fixing clamp and fork-shaped exhaust rocker arm machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210905776.2A CN115179071A (en) | 2022-07-29 | 2022-07-29 | Fork-shaped exhaust rocker arm fixing clamp and fork-shaped exhaust rocker arm machining method |
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| Publication Number | Publication Date |
|---|---|
| CN115179071A true CN115179071A (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210905776.2A Pending CN115179071A (en) | 2022-07-29 | 2022-07-29 | Fork-shaped exhaust rocker arm fixing clamp and fork-shaped exhaust rocker arm machining method |
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| CN (1) | CN115179071A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030085500A1 (en) * | 2001-11-03 | 2003-05-08 | Rudolf Kohlert | Clamping element with sliding clamping claw |
| CN203875650U (en) * | 2014-05-16 | 2014-10-15 | 陕西柴油机重工有限公司 | Y-shaped rocker arm molded face milling and positioning fixture |
| CN104875038A (en) * | 2015-06-17 | 2015-09-02 | 沈阳飞机工业（集团）有限公司 | Three-in-one fixture for shape processing of rocker arm and use method of fixture |
| CN109531164A (en) * | 2018-12-28 | 2019-03-29 | 盛瑞传动股份有限公司 | Exhaust pipe Special Fixture for Machining and exhaust pipe processing technique |
| CN209125390U (en) * | 2018-09-27 | 2019-07-19 | 杭州昌鼎机械有限公司 | Upper rocker arm groove milling air-actuated jaw before a kind of left and right |
| CN211332250U (en) * | 2019-12-05 | 2020-08-25 | 陕西柴油机重工有限公司 | Adjustable rocker arm deep hole drilling clamp |
| CN215545086U (en) * | 2021-06-04 | 2022-01-18 | 上海斯瑞佛汽车零部件有限公司 | Automobile exhaust pipe drilling tool |
-
2022
- 2022-07-29 CN CN202210905776.2A patent/CN115179071A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030085500A1 (en) * | 2001-11-03 | 2003-05-08 | Rudolf Kohlert | Clamping element with sliding clamping claw |
| CN203875650U (en) * | 2014-05-16 | 2014-10-15 | 陕西柴油机重工有限公司 | Y-shaped rocker arm molded face milling and positioning fixture |
| CN104875038A (en) * | 2015-06-17 | 2015-09-02 | 沈阳飞机工业（集团）有限公司 | Three-in-one fixture for shape processing of rocker arm and use method of fixture |
| CN209125390U (en) * | 2018-09-27 | 2019-07-19 | 杭州昌鼎机械有限公司 | Upper rocker arm groove milling air-actuated jaw before a kind of left and right |
| CN109531164A (en) * | 2018-12-28 | 2019-03-29 | 盛瑞传动股份有限公司 | Exhaust pipe Special Fixture for Machining and exhaust pipe processing technique |
| CN211332250U (en) * | 2019-12-05 | 2020-08-25 | 陕西柴油机重工有限公司 | Adjustable rocker arm deep hole drilling clamp |
| CN215545086U (en) * | 2021-06-04 | 2022-01-18 | 上海斯瑞佛汽车零部件有限公司 | Automobile exhaust pipe drilling tool |
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