CN115592444A - Mounting device for processing and positioning lower part structure of precombustion chamber - Google Patents

Mounting device for processing and positioning lower part structure of precombustion chamber Download PDF

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Publication number
CN115592444A
CN115592444A CN202211362503.4A CN202211362503A CN115592444A CN 115592444 A CN115592444 A CN 115592444A CN 202211362503 A CN202211362503 A CN 202211362503A CN 115592444 A CN115592444 A CN 115592444A
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China
Prior art keywords
positioning
holes
transverse plate
straight groove
plate body
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CN202211362503.4A
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Chinese (zh)
Inventor
欧小庆
李玉俊
张明红
刘海珍
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KUNSHAN JIANGJIN MACHINERY CO Ltd
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KUNSHAN JIANGJIN MACHINERY CO Ltd
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Priority to CN202211362503.4A priority Critical patent/CN115592444A/en
Publication of CN115592444A publication Critical patent/CN115592444A/en
Pending legal-status Critical Current

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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
    • B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

The invention provides a mounting device for processing and positioning a lower part structure of a precombustion chamber, which can ensure the processing precision of a special-shaped curved surface of an inner cavity and reduce the labor intensity and the production cost of workers. It includes: the positioning cone comprises a concave cone cavity and an upper outer ring, the center of the upper outer ring is provided with the concave cone cavity, and the cone cavity is arranged by copying the partial shape of the lower structure of the pre-combustion chamber; the flange plate comprises a flange plate body and an inner concave straight groove, wherein the inner concave straight groove is arranged on the front end surface of the flange plate body and is a groove with the diameter and the length, and a plurality of first locking holes are distributed in the inner concave straight groove along the length direction; the transverse plate comprises a transverse plate body and positioning holes, wherein a plurality of first positioning connecting holes are distributed in one end face in the thickness direction of the transverse plate; and the pressing plates comprise vertical plates and horizontal plates, at least one second positioning hole is formed in each horizontal plate, the first bolt penetrates through the second positioning holes, and the large end of the first bolt is pressed on the upper surface of each horizontal plate to be arranged.

Description

Mounting device for processing and positioning lower part structure of precombustion chamber
Technical Field
The invention relates to the technical field of manufacturing of a lower part structure of a precombustion chamber, in particular to an installation device for processing and positioning the lower part structure of the precombustion chamber.
Background
The lower structural material of the precombustion chamber is one of the most difficult-to-machine materials in metal materials, the matrix of the precombustion chamber is austenite, the machining hardening is easy to generate during machining, the cutting and chip removal are difficult, the heat conductivity coefficient is low, the cutting vibration is serious, and the precombustion chamber contains hard carbide abrasive particles. The inner cavity of the lower structure of the precombustion chamber belongs to a complex abnormal curved surface and comprises an axial inclined hole tangent to an inner arc surface, a radial high-precision inclined hole, a spherical surface and a tangent arc surface. In the milling process with large tool consumption, the clamping and processing mode has the advantages that pre-loosening is easily caused due to large cutting force, so that parts are scrapped, the processing of the special-shaped curved surface can be completed only through secondary clamping and adjusting, the production progress is seriously influenced, and the production cost is increased.
Disclosure of Invention
Aiming at the problems, the invention provides a mounting device for processing and positioning a lower part structure of a precombustion chamber, which can ensure the processing precision of the special-shaped curved surface of an inner cavity and reduce the labor intensity and the production cost of workers.
A mounting arrangement for positioning the substructure of a prechamber, characterized in that it comprises:
the positioning cone comprises a concave cone cavity and an upper outer ring, wherein the concave cone cavity is arranged in the center of the upper outer ring, and the cone cavity is arranged by copying the partial shape of the lower structure of the pre-combustion chamber;
the flange plate comprises a flange plate body and an inner concave straight groove, the inner concave straight groove is arranged on the front end face of the flange plate body and is a groove with the diameter and the length, and a plurality of first locking holes are distributed in the inner concave straight groove along the length direction;
the transverse plate comprises a transverse plate body and positioning holes, wherein a plurality of first positioning connecting holes are distributed in one end face of the transverse plate in the thickness direction;
the pressing plates comprise vertical plates and horizontal plates, at least one second positioning hole is formed in each horizontal plate, the first bolts penetrate through the second positioning holes, and the large end ends of the first bolts are arranged on the upper surfaces of the horizontal plates in a pressing mode;
the upper outer ring is annularly provided with a plurality of second through locking holes, the positioning cones are positioned in the positioning holes, the lower surface of the upper outer ring is supported on the upper surface of the transverse plate body, the transverse plate body is provided with aligning threaded holes corresponding to the second locking holes, and second bolts are fixedly connected with the through locking holes and the aligning threaded holes respectively;
one end of the transverse plate is inserted into the inner concave straight groove and is connected with the first locking hole and the first positioning connecting hole through a fastening structure;
and a plurality of flange positioning holes are distributed on the flange plate body and are used for fixedly connecting the butt flange on the rotary working table.
It is further characterized in that:
the width of the inward concave straight groove is equal to the thickness of the transverse plate, and one end of the transverse plate is embedded in the inward concave straight groove to ensure the planar arrangement of the transverse plate;
the cone cavity is arranged by copying on a lower convex conical surface of the lower structure of the pre-combustion chamber, so that the shape of the lower structure of the pre-combustion chamber is accurately and reliably positioned;
the inner end of the horizontal plate is provided with a pressing end, the inner wall of the horizontal plate is of an arc structure, the direction of the inner wall of the horizontal plate is arranged on the outer wall of the upper convex stop ring of the lower structure of the pre-combustion chamber, and the pressing end presses and attaches the upper spigot ring surface of the lower structure of the pre-combustion chamber in a pressing and attaching state;
and the upper outer ring is provided with second locking threaded holes corresponding to the positions of the second positioning holes respectively, and the bottom column end threads of the first bolts are fixedly inserted into the second locking threaded holes, so that the reliable pressing of the pressing plate on the lower structure of the precombustion chamber is ensured.
After the positioning device is adopted, the positioning cone, the flange plate, the transverse plate, the pressing plate and the bolts are assembled, then the flange plate is fixed on a flange of a rotary worktable of a machining center, and the large end surface and the inner conical surface of the positioning cone are corrected and adjusted before machining to ensure that the runout is less than or equal to 0.02; then the whole structure and the pre-combustion chamber lower part structure with the shape processed and formed are pre-installed on the installation device, and the secondary correction and adjustment of the pre-inner conical surface and the large end face runout are less than or equal to 0.02; the complex inner cavity special-shaped curved surface of the lower structure of the precombustion chamber is processed at one time by customizing a special non-standard cutter by utilizing the rotation angle of the rotary worktable; the processing mode can well ensure the dimensional accuracy (including dimension, roughness and form and position tolerance) of the special-shaped curved surface of the inner cavity at the lower part of the precombustion chamber, and also reduce the labor intensity of workers and the production cost.
Drawings
FIG. 1 is a perspective view of the lower structure of the prechamber;
FIG. 2 is a partial cross-sectional perspective view of the prechamber substructure;
FIG. 3 is a perspective view of the mounting of the prechamber substructure to the present invention;
FIG. 4 is a schematic top view of the structure of FIG. 3;
FIG. 5 isbase:Sub>A schematic view of the section A-A of FIG. 4;
FIG. 6 is a front view of the flange of the present invention;
FIG. 7 is a schematic view of section B-B of FIG. 6;
FIG. 8 is a top view of the cross plate of the present invention;
FIG. 9 is a left side view schematic of the structure of FIG. 8;
the names corresponding to the sequence numbers in the figure are as follows:
the pre-combustion chamber positioning structure comprises a positioning cone 10, a cone cavity 11, an upper outer ring 12, a second locking hole 121, a second locking threaded hole 122, a flange plate 20, a flange plate body 21, a flange positioning hole 211, an inner straight groove 22, a first locking hole 23, a transverse plate 30, a transverse plate body 31, an alignment threaded hole 311, a positioning hole 32, a first positioning connecting hole 33, a pressing plate 40, a vertical plate 41, a horizontal plate 42, a lower pressing end 421, an arc-shaped structure 422, a second positioning hole 43, a pre-combustion chamber lower structure 50, a lower convex conical surface 51, an upper convex stop ring 52, an upper spigot ring surface 53, a first bolt 60 and a second bolt 70.
Detailed Description
A mounting device for processing and positioning a lower structure of a precombustion chamber is shown in figures 1-9 and comprises a positioning cone 10, a flange plate 20, a transverse plate 30 and a plurality of pressure plates 40;
the positioning cone 10 comprises a concave cone cavity 11 and an upper outer ring 12, wherein the concave cone cavity 11 is arranged in the center of the upper outer ring 12, and the cone cavity 11 is arranged by copying the partial shape of the lower structure 50 of the precombustion chamber;
the flange plate 20 comprises a flange plate body 21 and an inner concave straight groove 22, the inner concave straight groove 22 is arranged on the front end face of the flange plate body 21 and is a groove with the diameter and the length, and a plurality of first locking holes 23 are distributed in the inner concave straight groove 22 along the length direction;
the transverse plate 30 comprises a transverse plate body 31 and positioning holes 32, and a plurality of first positioning connecting holes 33 are distributed on one end surface of the transverse plate 30 in the thickness direction;
each pressing plate 40 comprises a vertical plate 41 and a horizontal plate 42, at least one second positioning hole 43 is arranged on the horizontal plate 42, the first bolt 60 penetrates through the second positioning hole 43, and the large end of the first bolt 60 is pressed and attached to the upper surface of the horizontal plate 42;
a plurality of second through locking holes 121 are annularly distributed on the upper outer ring 12, the positioning cones 10 are positioned in the positioning holes 32, the lower surface of the upper outer ring 12 is supported on the upper surface of the transverse plate body 31, alignment threaded holes 311 are formed in the transverse plate body 31 at positions corresponding to the second locking holes 121, and the second bolts 70 are fixedly connected with the second through locking holes 121 and the alignment threaded holes 311 respectively;
one end of the transverse plate 30 is inserted into the inner concave straight groove 22 and is connected with the first locking hole 23 and the first positioning connecting hole 33 through a fastening structure;
four flange positioning holes 211 are uniformly and annularly distributed on the flange plate body 21, and the flange positioning holes 211 are used for fixedly connecting the butt-joint flange on the rotary working table.
The width of the inner concave straight groove 22 is equal to the thickness of the transverse plate 30, and one end of the transverse plate 30 is embedded in the inner concave straight groove 22 to ensure the planar arrangement of the transverse plate;
the cone cavity 11 is arranged by copying on a lower convex cone surface 51 of the lower structure 50 of the pre-combustion chamber, so that the shape positioning of the lower structure 50 of the pre-combustion chamber is accurate and reliable;
the inner end of the horizontal plate 42 is provided with a pressing end 421, the inner wall of the horizontal plate 42 is an arc-shaped structure 422, the direction of the inner wall is arranged on the outer wall of the upper convex stop ring 52 of the lower structure 50 of the pre-combustion chamber, and the pressing end 421 presses and attaches the upper spigot ring surface 53 of the lower structure 50 of the pre-combustion chamber in a pressing and attaching state;
the upper outer ring 12 is provided with second locking screw holes 122 corresponding to the second positioning holes 43, the bottom column end of the first bolt 60 is screwed into the second locking screw holes 122, and the lower end of the vertical plate 41 is pressed on the upper surface of the horizontal plate body 31, so as to ensure the reliable pressing of the pressing plate 40 on the lower structure 50 of the pre-combustion chamber.
The working principle is as follows, the positioning cone 10, the flange plate 20, the transverse plate 30, the pressing plate 40 and the bolts are assembled, then the flange plate 20 is fixed on a flange of a rotary worktable of a machining center, and the large end surface and the inner conical surface of the positioning cone are adjusted and adjusted before machining to ensure that the runout is less than or equal to 0.02; then the whole structure and the pre-combustion chamber lower part structure 50 with the shape processed and formed are pre-installed on the installation device, and the secondary correction and adjustment of the pre-inner conical surface and the large end face runout are less than or equal to 0.02; the complex inner cavity special-shaped curved surface of the lower structure of the precombustion chamber is processed at one time by customizing a special non-standard cutter by utilizing the rotation angle of the rotary worktable; the processing mode can well ensure the dimensional accuracy (including dimension, roughness and form and position tolerance) of the special-shaped curved surface of the inner cavity at the lower part of the precombustion chamber, and also reduce the labor intensity of workers and the production cost.
The idea of designing the mounting device for processing and positioning the lower part structure of the precombustion chamber is divided into the following key steps:
(1) designing a positioning cone: the method comprises the following steps that 1, a pre-large-end outer circular conical surface is selected as a positioning reference, and the conical surface matching has the advantages of reliable positioning, high machining precision, convenience in disassembly and assembly, difficulty in damage of a matching contact surface and the like; the conical surface matching is selected according to the national standard requirement; step 2, determining the total thickness of the positioning cone, wherein the total thickness of the positioning cone is required to be processed once in advance, so that the position of a pre-radial high-precision inclined hole is avoided, and the final total thickness of the positioning cone is determined through calculation; step 3, determining the subsequent positioning excircle, positioning surface size and action tolerance requirements of the positioning cone matched with the transverse plate according to the deformation; determining the position of the countersunk head screw hole according to the condition;
(2) designing a transverse plate: step 1, determining the size and form and position tolerance of a positioning inner hole of a transverse plate and a positioning cone, and selecting transition fit, wherein the transition fit clearance and the interference magnitude are small, the positioning accuracy is high, and hole shafts have good centering performance and coaxiality and are easy to disassemble and assemble for positioning connection; step 2, determining the total thickness of the transverse plate, wherein the total thickness of the transverse plate is required to be processed at one time to avoid the position of a pre-radial high-precision inclined hole, and the final total thickness of the positioning cone is determined according to calculation; the shape and the screw hole are determined according to the subsequent conditions;
(3) designing a flange plate: step 1, determining the maximum outer diameter of a flange plate, the size of a positioning reference excircle and the size and the position of 4 countersunk head screw holes according to the outer diameter of a flange on a rotary worktable, the size of the positioning reference hole and the size and the position of 4 screw holes for connection; step 2, determining the straight groove positions of the flange plate and the transverse plate, and designing a transverse plate alignment plane at the axis position of the flange plate for subsequent alignment; step 3, determining the size and form and position tolerance of the straight groove of the flange plate, and selecting transition fit, wherein the transition fit clearance and the interference magnitude are small, the positioning accuracy is high, and the hole shafts have good centering performance and coaxiality and are easy to disassemble and assemble for positioning connection; step 4, connecting the flange plate and the transverse plate, and reversely pulling and locking the flange plate by using the hexagon socket head cap screws, so that the flange plate is mainly convenient to fasten and dismount, bears larger load and is not easy to slide at an angle and the like; the size and the position of the shape are determined according to the situation;
(4) designing a pressing plate, namely performing three-dimensional assembly on the lower part of the precombustion chamber and the size determined by a positioning cone, a transverse plate and a flange plate in the step 1, designing an arc-shaped pressing plate according to the appearance and the assembly height of the lower part of the precombustion chamber, automatically adjusting the size according to errors to achieve the effect of pressing, and designing the arc-shaped pressing plate to mainly have a better positioning effect; step 2, determining the shapes of the positioning cone and the transverse plate and the sizes and the positions of the countersunk head screw holes and the screw holes of all gears according to the assembly requirements of the four key parts, and playing a final connecting and fixing role;
(5) the processing of the lower part of the precombustion chamber is verified for the first time, step 1 is to assemble the installation device, pay attention to the assembly relation and assembly requirement during the assembly; step 2, fixing the flange plate on a flange of a rotary worktable of the machining center, and adjusting the runout of the large end surface and the inner conical surface of the positioning cone to ensure that the runout is less than or equal to 0.02; step 3, pre-mounting the pre-installed part on the installation device, and secondarily correcting and adjusting the pre-inner conical surface and the large end face runout to be less than or equal to 0.02; and 4, machining the pre-complicated inner cavity special-shaped curved surface at one time by customizing a special nonstandard cutter by utilizing the rotation angle of the rotary working table.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. A mounting device for positioning the processing of a substructure of a prechamber, characterized in that it comprises:
the positioning cone comprises a concave cone cavity and an upper outer ring, wherein the concave cone cavity is arranged in the center of the upper outer ring, and the cone cavity is arranged by copying the shape of part of a lower structure of the precombustion chamber;
the flange plate comprises a flange plate body and an inner concave straight groove, wherein the inner concave straight groove is arranged on the front end face of the flange plate body and is a groove with the diameter and the length, and a plurality of first locking holes are distributed in the inner concave straight groove along the length direction;
the transverse plate comprises a transverse plate body and positioning holes, wherein a plurality of first positioning connecting holes are distributed in one end face of the transverse plate in the thickness direction;
the pressing plates comprise vertical plates and horizontal plates, at least one second positioning hole is formed in each horizontal plate, the first bolts penetrate through the second positioning holes, and the large end ends of the first bolts are arranged on the upper surfaces of the horizontal plates in a pressing mode;
the upper outer ring is annularly provided with a plurality of second through locking holes, the positioning cones are positioned in the positioning holes, the lower surface of the upper outer ring is supported on the upper surface of the transverse plate body, the transverse plate body is provided with aligning threaded holes corresponding to the second locking holes, and second bolts are fixedly connected with the through locking holes and the aligning threaded holes respectively;
one end of the transverse plate is inserted into the inner concave straight groove and is connected with the first locking hole and the first positioning connecting hole through a fastening structure;
and a plurality of flange positioning holes are distributed on the flange plate body and are used for fixedly connecting the butt flange on the rotary working table.
2. The mounting arrangement for precombustor substructure machining positioning as claimed in claim 1, characterized in that: the width of the inner concave straight groove is equal to the thickness of the transverse plate, and one end of the transverse plate is embedded in the inner concave straight groove.
3. The mounting arrangement for precombustor substructure machining positioning as claimed in claim 1, characterized in that: the cone cavity is arranged along the lower convex conical surface of the lower structure of the precombustion chamber.
4. The mounting arrangement for precombustor substructure machining positioning as claimed in claim 1, characterized in that: the inner end of the horizontal plate is provided with a pressing end, the inner wall of the horizontal plate is of an arc structure and is arranged in the direction of the outer wall of the upper convex stop ring of the lower structure of the pre-combustion chamber, and the pressing end presses and attaches the upper spigot ring surface of the lower structure of the pre-combustion chamber in a pressing and attaching state.
5. The mounting arrangement for precombustor substructure machining positioning as claimed in claim 1, characterized in that: and the upper outer ring is provided with second locking threaded holes corresponding to the positions of the second positioning holes respectively, and the bottom column end of the first bolt is fixedly inserted into the second locking threaded holes in a threaded manner.
CN202211362503.4A 2022-11-02 2022-11-02 Mounting device for processing and positioning lower part structure of precombustion chamber Pending CN115592444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211362503.4A CN115592444A (en) 2022-11-02 2022-11-02 Mounting device for processing and positioning lower part structure of precombustion chamber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211362503.4A CN115592444A (en) 2022-11-02 2022-11-02 Mounting device for processing and positioning lower part structure of precombustion chamber

Publications (1)

Publication Number Publication Date
CN115592444A true CN115592444A (en) 2023-01-13

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ID=84851441

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211362503.4A Pending CN115592444A (en) 2022-11-02 2022-11-02 Mounting device for processing and positioning lower part structure of precombustion chamber

Country Status (1)

Country Link
CN (1) CN115592444A (en)

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