CN110936204A - Machining clamp for disc brake bracket - Google Patents
Machining clamp for disc brake bracket Download PDFInfo
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- CN110936204A CN110936204A CN202010016781.9A CN202010016781A CN110936204A CN 110936204 A CN110936204 A CN 110936204A CN 202010016781 A CN202010016781 A CN 202010016781A CN 110936204 A CN110936204 A CN 110936204A
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- wedge block
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- 238000003754 machining Methods 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 83
- 230000008093 supporting effect Effects 0.000 claims abstract description 78
- 238000003825 pressing Methods 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 89
- 230000000903 blocking effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003746 surface roughness 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
- B23Q3/08—Work-clamping means other than mechanically-actuated
- B23Q3/082—Work-clamping means other than mechanically-actuated hydraulically actuated
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
The invention discloses a machining clamp of a disc brake bracket, which comprises a bridge plate, a tailstock and a rotary worktable, wherein the tailstock and the rotary worktable are movably arranged on two sides of the bridge plate, a hydraulic clamping assembly arranged on the bridge plate, an oil supply system connected with the hydraulic clamping assembly, and a servo motor in transmission connection with the rotary worktable through a worm gear and a worm; the servo motor is controlled with the machine tool on line; the hydraulic clamping assembly consists of a wedge spring centering mechanism, a wedge oil cylinder supporting and positioning mechanism, a floating support pressing mechanism and a corner oil cylinder pressing mechanism; the machining fixture for the disc brake bracket disclosed by the invention has the advantages of automatic centering of a wedge spring mechanism, automatic tensioning and positioning of a wedge oil cylinder, supporting of a supporting oil cylinder, multi-point pressing and capability of rotating along a rotating shaft.
Description
Technical Field
The invention relates to a brake bracket machining clamp, in particular to a machining clamp for a disc brake bracket, and belongs to the technical field of brake bracket machining equipment.
Background
As shown in fig. 1, the disc brake bracket is made of ductile iron casting with high strength, and because the closed lintel on one side of the structure is narrow and the two jaws are open structures, tool lines are easily formed due to vibration in the machining process of the disc brake bracket, so that the machining precision and the surface roughness are affected; and easily produce the deformation when clamping on anchor clamps, loosen the work piece again and kick-back after the work piece processing finishes, make the size of processing change, very big influence the size precision and the position precision of processing.
In the design of the traditional bracket hydraulic clamp, three fixed supports and one floating support are added, four hydraulic cylinder pressing plates are pressed tightly without an automatic centering mechanism, one end of a workpiece is generally fixed in the direction of a rotating shaft, and the other end of the workpiece is manually adjusted; therefore, when the size of the casting blank changes, the asymmetry of the processing surface relative to the blank surface is increased, and the precision and the service performance of the product are influenced. Therefore, the invention designs a disc brake bracket machining clamp, and solves the problem of a hydraulic clamp for completing the first-order machining of a disc brake bracket by adding a fourth shaft in a common machining center.
Disclosure of Invention
In order to solve the problems, the invention provides a full-hydraulic disc brake bracket processing clamp which is provided with a wedge spring mechanism for automatic centering, a wedge oil cylinder for automatic tensioning and positioning, a supporting oil cylinder for supporting, multi-point pressing and can rotate along a rotating shaft.
The invention discloses a machining clamp of a disc brake bracket, which comprises a bridge plate, a tailstock and a rotary worktable, wherein the tailstock and the rotary worktable are movably arranged on two sides of the bridge plate, a hydraulic clamping assembly is arranged on the bridge plate, an oil supply system connected with the hydraulic clamping assembly, and a servo motor in transmission connection with the rotary worktable through a worm gear; the servo motor is controlled with the machine tool on line;
the hydraulic clamping assembly consists of a wedge spring centering mechanism, a wedge oil cylinder supporting and positioning mechanism, a floating support pressing mechanism and a corner oil cylinder pressing mechanism;
the wedge spring centering mechanism comprises a floating wedge block arranged in the center of the front side of the bridge plate, centering wedge blocks in sliding connection with two sides of the floating wedge block, and wedge block guide sleeves fixed with the bridge plate through fastening screws; a plurality of springs are arranged between the floating wedge block and the bridge plate; three supporting legs which are distributed in a triangular shape and have square sections are integrally fixed at the lower part of the floating wedge block; the supporting legs are movably inserted into three square holes formed in the bridge plate; the lower end parts of the supporting legs are provided with threaded holes; a tensioning screw is arranged in the threaded hole in a threaded manner; the tensioning screw tensions the floating wedge block through the check ring; the upper end of the wedge block guide sleeve is provided with a square hole for guiding the centering wedge block to slide along the direction parallel to the bridge plate; a first return spring and a first plugging wire are arranged in a square hole of the wedge block guide sleeve; one end of the first return spring is connected with the first plugging wire, and the other end of the first return spring is connected with the centering wedge block;
the wedge block oil cylinder tensioning and positioning mechanisms are symmetrically arranged on two sides of the wedge spring centering mechanism; each wedge block oil cylinder tensioning and positioning mechanism comprises a tensioning mechanism shell, a single-action hydraulic cylinder, an inclined plane ejector rod and a tensioning wedge block, wherein the single-action hydraulic cylinder is arranged on the bridge plate in a threaded mode, the inclined plane ejector rod is connected with a piston rod of the single-action hydraulic cylinder, and the tensioning wedge block is movably contacted with the other end of the inclined plane ejector rod; the inclined surface ejector rod is of a cylindrical structure, and an inclined surface with a 45-degree central line is formed on the upper end surface of the inclined surface ejector rod in a processing mode; the inclined plane is contacted with the inclined plane at the lower part of the tightening wedge block; the shell of the tightening mechanism covers the upper part of the single-action hydraulic cylinder and is connected with a square positioning hole arranged on the bridge plate through a positioning screw; the upper end of the shell of the tightening mechanism is of an arc structure, and a square hole for installing a tightening wedge block is axially formed along the circle center of the shell; a second return spring and a second plug wire are arranged in the square hole; one end of the second reset spring is connected with the second plugging wire, and the other end of the second reset spring is connected with the tensioning wedge block; the lower end of the shell of the tightening mechanism is of a rectangular structure, and a circular stepped hole is formed in the height direction of the shell of the tightening mechanism; the circular stepped hole is communicated with a guide hole which is arranged above the circular stepped hole and used for guiding the inclined surface mandril to move;
the floating support pressing mechanism consists of two symmetrically arranged support hydraulic cylinders and a floating support cylinder; the two supporting hydraulic cylinders are respectively connected with the bridge plate through supporting hydraulic cylinder seats; the floating support cylinder is in threaded connection with a threaded mounting hole formed in the bridge plate;
the corner oil cylinder pressing mechanism consists of a first corner hydraulic cylinder, a second corner hydraulic cylinder, a third corner hydraulic cylinder, a fourth corner hydraulic cylinder and a fifth corner hydraulic cylinder; the first corner hydraulic cylinder, the second corner hydraulic cylinder, the third corner hydraulic cylinder and the fourth corner hydraulic cylinder are respectively fixed on the bridge plate through corner hydraulic cylinder seats; the first corner hydraulic cylinder and the second corner hydraulic cylinder are symmetrically arranged on two sides of the wedge spring centering mechanism; the third corner hydraulic cylinder and the fourth corner hydraulic cylinder are symmetrically arranged on the rear side of the wedge block oil cylinder tensioning and positioning mechanism; the fifth corner hydraulic cylinder is arranged in the center of the two supporting hydraulic cylinders and is fixed on the hydraulic cylinder seat through a middle hole arranged on the supporting hydraulic cylinder seat and a round hole arranged on the bridge plate; the hydraulic cylinder seat is fixed on the lower bottom surface of the bridge plate through threads; a piston rod of the first corner hydraulic cylinder and a piston rod of the second corner hydraulic cylinder are respectively fixed with a first pressing plate; a piston rod of the third corner hydraulic cylinder and a piston rod of the fourth corner hydraulic cylinder are respectively fixed with a second pressing plate; and a piston rod of the fifth corner hydraulic cylinder is connected with a third pressing plate through a connecting rod.
A fixed support assembly is also fixed on the bridge plate; the fixed supporting assembly consists of two fixed supporting blocks and a fixed supporting seat; the two fixed supporting blocks are respectively arranged at the front sides of the two wedge block oil cylinder tensioning and positioning mechanisms; the fixed supporting seat and the floating supporting cylinder are symmetrically arranged on the rear sides of the two wedge block oil cylinder tightening positioning mechanisms respectively.
In a preferred embodiment, the end face of the floating wedge is in a U-shaped structure, and the upper part of the front face of the floating wedge is in a trapezoid structure.
Furthermore, the two supporting hydraulic cylinders are respectively fixed in two threaded fixing holes formed in the supporting hydraulic cylinder base in a threaded manner.
Furthermore, a tailstock bridge plate connecting disc and a bridge plate rotary worktable connecting disc are respectively arranged on two sides of the bridge plate; the tailstock bridge plate connecting disc is fixedly connected with a tailstock rotary disc arranged on the inner side of the tailstock; and the bridge plate rotary table connecting disc is fixedly connected with a rotary table turntable arranged on the inner side of the rotary table.
And furthermore, a centering round hole which is arranged in the same axis and used for centering and mounting the tailstock bridge plate connecting disc and the bridge plate rotating table connecting disc and the bridge plate is respectively arranged between the rotating table and the tailstock.
Furthermore, the bridge plate is a rectangular steel plate, and two ends of the bridge plate in the length direction are respectively provided with two square tenon joints which are used for being in plug-in connection with square through holes arranged on a tail seat bridge plate connecting disc and a bridge plate rotary working table connecting disc; and a clamp tool setting hole with a circular structure is formed between the third corner hydraulic cylinder and the fourth corner hydraulic cylinder on the bridge plate.
Furthermore, the oil supply system comprises an oil way rotary joint connected with an external hydraulic station, an oil distributor connected with the oil way rotary joint, an oil path plate connected with the oil distributor through an oil pipe joint, and a plurality of oil pipes connected with the oil path plate; and the other ends of the oil pipes are respectively connected with the supporting hydraulic cylinder, the first corner hydraulic cylinder, the fifth corner hydraulic cylinder, the floating supporting cylinder and the single-action hydraulic cylinder.
Furthermore, an outer oil port used for being connected with an external oil path is arranged on the excircle of the head part of the oil path rotary joint, and an inner oil port used for being communicated with the outer oil port is arranged on the end face of the tail part of the oil path rotary joint; the head of the oil path rotary joint is connected with the base of the rotary worktable through a rotary joint fixing disc and a key; the tail part of the oil way rotary joint sequentially penetrates through centering round holes arranged in the centers of the rotary working table and the bridge plate rotary working table connecting disc and is connected with the oil distributor through screws.
Furthermore, lifting rings are respectively fixed on the upper top surface of the tailstock and the upper top surface of the rotary worktable.
Compared with the prior art, the machining clamp for the disc brake bracket, disclosed by the invention, has the advantages that the fourth shaft is added in a common machining center by utilizing the rotary workbench and matching with the tailstock, an oil path in the clamp is connected with an external hydraulic station through an oil path rotary joint, and a hydraulic control system is connected with a machine tool interface; the numerical control programming and one-key starting machining can be realized, the clamp is reliable in positioning, firm in clamping, convenient to assemble and disassemble, high in machining precision and good in economic benefit.
Drawings
Fig. 1 is a schematic view of a prior art disc brake carrier structure.
Fig. 2 is a schematic view of the overall structure of the present invention.
Fig. 3 is a schematic top view of the present invention.
Fig. 4 is a schematic bottom view of the present invention.
Fig. 5 is a rear view structural diagram of the present invention.
FIG. 6 is a schematic sectional view A-A of the present invention.
FIG. 7 is a schematic cross-sectional view of the cam spring centering mechanism of the present invention.
FIG. 8 is a schematic sectional view of the wedge cylinder tightening positioning mechanism of the present invention.
The components in the drawings are labeled as: 1-tailstock, 2-hoisting ring, 3-bracing mechanism shell, 4-floating wedge block, 5-supporting hydraulic cylinder seat, 6-supporting hydraulic cylinder, 7-connecting rod, 8-third pressing plate, 9-bracing wedge block, 10-corner hydraulic cylinder seat, 11A-first corner hydraulic cylinder, 11B-second corner hydraulic cylinder, 11C-third corner hydraulic cylinder, 11D-fourth corner hydraulic cylinder, 11E-fifth corner hydraulic cylinder, 12A-first pressing plate, 12B-second pressing plate, 13-oil path rotary joint, 14-servo motor, 15-rotary table turntable, 16-bridge plate rotary table connecting plate, 17-oil separator, 18-oil pipe joint, 19-oil pipe, 20-floating supporting cylinder, 21-fixed supporting seat, 22-bridge plate, 23-rotary table, 24-tailstock turntable, 25-tailstock bridge plate connecting plate, 26 clamp tool-aligning hole, 27-tensioning screw, 28-fixed supporting block, 29-wedge block guide sleeve, 30-centering wedge block, 31-rotary joint fixing plate, 32-oil passage plate, 33-hydraulic cylinder seat, 34-spring, 35A-first blocking wire, 35B-second blocking wire, 36-single-acting hydraulic cylinder, 37-single-acting hydraulic cylinder piston rod, 38-inclined plane ejector rod, 39-round stepped hole, 40A-first return spring, 40B-second return spring, 41-retainer ring, 42-supporting leg, 43-square hole, 44-square hole, 45-fastening screw and 46-square hole, 47-outer oil port.
Detailed Description
As shown in fig. 2 to 8, the machining jig for the disc brake bracket of the present invention includes a bridge plate 22, a tailstock 1 and a rotary table 23 movably installed at both sides of the bridge plate 22, a hydraulic clamping assembly installed on the bridge plate 22, an oil supply system connected to the hydraulic clamping assembly, and a servo motor 14 connected to the rotary table 23 through a worm gear; the servo motor 14 is controlled on line with the machine tool;
the hydraulic clamping assembly consists of a wedge spring centering mechanism, a wedge oil cylinder supporting and positioning mechanism, a floating support pressing mechanism and a corner oil cylinder pressing mechanism;
the wedge spring centering mechanism comprises a floating wedge block 4 arranged in the center of the front side of the bridge plate 22, a centering wedge block 30 connected with the two sides of the floating wedge block 4 in a sliding manner, and a wedge block guide sleeve 29 fixed with the bridge plate 22 through a fastening screw 45; a plurality of springs 34 are arranged between the floating wedge 4 and the bridge plate 22; three supporting legs 42 which are distributed in a triangular shape and have square sections are integrally fixed at the lower part of the floating wedge block 4; the supporting feet 42 are movably inserted into three square holes 46 formed in the bridge plate 22; the lower end part of the supporting leg 42 is provided with a threaded hole; a tensioning screw 27 is installed in the threaded hole in a threaded manner; the tensioning screw 27 tensions the floating wedge 4 through a retainer ring 41; the upper end of the wedge block guide sleeve 29 is provided with a square hole 43 for guiding the centering wedge block 30 to slide along the direction parallel to the bridge plate 22; a first return spring 40A and a first plugging wire 35A are arranged in a square hole 43 of the wedge block guide sleeve 29; one end of the first return spring 40A is connected with the first plugging wire 35A, and the other end thereof is connected with the centering wedge 30;
the wedge block oil cylinder tensioning and positioning mechanisms are symmetrically arranged on two sides of the wedge spring centering mechanism; each wedge block oil cylinder tensioning and positioning mechanism comprises a tensioning mechanism shell 3, a single-action hydraulic cylinder 36 which is arranged on the bridge plate 22 in a threaded mode, an inclined plane ejector rod 38 connected with a piston rod 37 of the single-action hydraulic cylinder, and a tensioning wedge block 9 which is movably contacted with the other end of the inclined plane ejector rod 38; the inclined plane ejector rod 38 is of a cylindrical structure, and an inclined plane with a 45-degree central line is formed on the upper end face of the inclined plane ejector rod; the inclined plane is contacted with the inclined plane at the lower part of the tightening wedge block 9; the tightening mechanism shell 3 covers the upper part of the single-action hydraulic cylinder 36 and is connected with a square positioning hole arranged on the bridge plate 22 through a positioning screw; the upper end of the shell 3 of the tightening mechanism is of an arc structure, and a square hole 44 for installing a tightening wedge block is axially formed along the circle center of the shell; a second return spring 40B and a second plugging wire 35B are arranged in the square hole 44; one end of the second return spring 40B is connected with the second plugging wire 35B, and the other end of the second return spring is connected with the tensioning wedge block 9; the lower end of the shell 3 of the tightening mechanism is rectangular, and a circular stepped hole 39 is formed along the height direction of the shell 3 of the tightening mechanism; the circular stepped hole 39 is communicated with a guide hole which is arranged above and used for guiding the movement of the inclined plane mandril 38;
the floating support pressing mechanism consists of two symmetrically arranged support hydraulic cylinders 6 and a floating support cylinder 20; the two supporting hydraulic cylinders 6 are respectively connected with the bridge plate 22 through supporting hydraulic cylinder seats 5; the floating support cylinder 20 is in threaded connection with a threaded mounting hole formed in the bridge plate 22;
the corner oil cylinder pressing mechanism consists of a first corner hydraulic cylinder 11A, a second corner hydraulic cylinder 11B, a third corner hydraulic cylinder 11C, a fourth corner hydraulic cylinder 11D and a fifth corner hydraulic cylinder 11E; the first corner hydraulic cylinder 11A, the second corner hydraulic cylinder 11B, the third corner hydraulic cylinder 11C and the fourth corner hydraulic cylinder 11D are respectively fixed on the bridge plate 22 through corner hydraulic cylinder seats 10; the first corner hydraulic cylinder 11A and the second corner hydraulic cylinder 11B are symmetrically arranged on two sides of the wedge spring centering mechanism; the third corner hydraulic cylinder 11C and the fourth corner hydraulic cylinder 11D are symmetrically arranged on the rear side of the wedge block oil cylinder tensioning and positioning mechanism; the fifth corner hydraulic cylinder 11E is arranged in the center of the two support hydraulic cylinders 6, and the fifth corner hydraulic cylinder 11E is fixed on the hydraulic cylinder seat 33 through a middle hole arranged on the support hydraulic cylinder seat 5 and a round hole arranged on the bridge plate 22; the hydraulic cylinder seat 33 is fixed on the lower bottom surface of the bridge plate 22 through threads; a piston rod of the first corner hydraulic cylinder 11A and a piston rod of the second corner hydraulic cylinder 11B are respectively fixed with a first pressing plate 12A; a piston rod of the third corner hydraulic cylinder 11C and a piston rod of the fourth corner hydraulic cylinder 11D are respectively fixed with a second pressing plate 12B; and a piston rod of the fifth corner hydraulic cylinder 11E is connected with a third pressing plate 8 through a connecting rod 7.
A fixed support assembly is also fixed on the bridge plate 22; the fixed supporting component consists of two fixed supporting blocks 28 and a fixed supporting seat 21; the two fixed supporting blocks 28 are respectively arranged at the front sides of the two wedge block oil cylinder tensioning and positioning mechanisms; the fixed supporting seat 21 and the floating supporting cylinder 20 are respectively and symmetrically arranged at the rear side of the two wedge block oil cylinder tightening positioning mechanisms.
The end surface of the floating wedge 4 is in a U-shaped structure, and the upper part of the front surface of the floating wedge is in a trapezoidal structure.
The two supporting hydraulic cylinders 6 are respectively fixed in two threaded fixing holes arranged on the supporting hydraulic cylinder base 5 in a threaded manner.
A tailstock bridge plate connecting disc 25 and a bridge plate rotary worktable connecting disc 16 are respectively arranged on two sides of the bridge plate 22; the tailstock bridge plate connecting disc 25 is fixedly connected with a tailstock turntable 24 arranged on the inner side of the tailstock 1; and the bridge plate rotary table connecting disc 16 is fixedly connected with a rotary table turntable 15 arranged on the inner side of the rotary table 23.
And a centering circular hole which is arranged in the same axis and used for centering and mounting the tailstock bridge plate connecting disc 25 and the bridge plate 22, the bridge plate rotating table connecting disc 16 and the bridge plate 22 is respectively arranged between the rotating table 23 and the tailstock 1.
The bridge plate 22 is a rectangular steel plate, and two ends of the bridge plate 22 in the length direction are respectively provided with two square tenons (not shown) which are used for being in plug-in connection with square through holes arranged on the tailstock bridge plate connecting disc 25 and the bridge plate rotary worktable connecting disc 16; and a clamp tool aligning hole 26 with a circular structure is formed between the third corner hydraulic cylinder 11C and the fourth corner hydraulic cylinder 11D on the bridge plate 22.
The oil supply system comprises an oil way rotary joint 13 connected with an external hydraulic station, an oil distributor 17 connected with the oil way rotary joint 13, an oil passage plate 32 connected with the oil distributor 17 through an oil pipe joint 18, and a plurality of oil pipes 19 connected with the oil passage plate 32; the other ends of the oil pipes 19 are respectively connected with the supporting hydraulic cylinder 6, the first corner hydraulic cylinders 11A to the fifth corner hydraulic cylinders 11E, the floating supporting cylinder 20 and the single-action hydraulic cylinder 36.
An outer oil port 47 for connecting an external oil path is arranged on the head excircle of the oil path rotary joint 13, and an inner oil port (not shown) for communicating with the outer oil port 47 is arranged on the tail end face of the oil path rotary joint; the head of the oil path rotary joint 13 is connected with the base of the rotary worktable 23 through a rotary joint fixed disc 31 and keys; the tail part of the oil path rotary joint 13 sequentially penetrates through centering round holes arranged in the centers of the rotary worktable 23 and the bridge plate rotary worktable connecting disc 16 and is connected with the oil separator 17 through screws.
And lifting rings 2 are respectively fixed on the upper top surface of the tailstock 1 and the upper top surface of the rotary worktable 23.
According to the machining clamp of the disc brake bracket, a fourth shaft is added to a common machining center by utilizing the rotary workbench 23 and matching with a tailstock, an oil path in the clamp is connected with an external hydraulic station through an oil path rotary joint 13, and a hydraulic control system is connected with a machine tool interface; the numerical control programming and one-key starting machining can be realized, the clamp is reliable in positioning, firm in clamping, convenient to assemble and disassemble, high in machining precision and good in economic benefit;
the rotary table 23 is in a square structure, is driven by a worm gear and a worm, is driven by the servo motor 14 to drive the worm to further drive the worm gear to perform indexing, and is locked by hydraulic pressure after indexing, so that the locking force is large, and the indexing precision is high; the rotary table 23 is a machine tool accessory in the prior art, which is provided with a rotatable table top and used for clamping a workpiece and realizing rotation and indexing positioning, and is called a rotary table or a fourth shaft for short, and the specific structure and the working principle thereof are not detailed herein; the servo motor 14 is controlled on line with the machine tool;
the tailstock 1 is matched with the rotary working table 23, driven by the rotary working table 23 to rotate passively, and bears the weight of clamp parts on the bridge plate 22 and the load generated during processing together with the rotary working table 23;
the middle parts of the rotary working table 23 and the tailstock 1 are provided with centering round holes with equal height, so that the centering installation of the tailstock bridge plate connecting disc 25 and the bridge plate 22 and the centering installation of the bridge plate rotary working table connecting disc 16 and the bridge plate 22 are facilitated;
the bridge plate 22 is a rectangular steel plate, two ends in the length direction are respectively provided with two square tenons which are inserted into square through holes in the tailstock bridge plate connecting disc 25 and the bridge plate rotary working table connecting disc 16, and the positioning and installation of the bridge plate 22 are realized;
the bridge plate 22 is provided with square and round positioning holes and thread mounting holes for mounting a hydraulic cylinder, a fixed bearing assembly, a wedge spring centering mechanism, a wedge block oil cylinder tensioning and positioning mechanism, a floating support pressing mechanism, a corner oil cylinder pressing mechanism and the like; the bridge plate 22 has a larger clamp pair tool hole 26 of circular structure; the shape of the oil circuit rotary joint 13 is similar to that of a grenade, the head and the tail can relatively rotate, an outer oil port which can be connected with an external oil circuit is arranged on the excircle of the head, an inner oil port which is communicated with the outer oil port on the excircle surface of the head is arranged on the end surface of the tail, hydraulic oil flows from the outer oil port of the head to the tail through an inner annular groove and an oil duct, the head of the oil circuit rotary joint 13 is connected with a base of a rotary worktable 23 through a rotary joint fixing disc 31 and a key, and the tail is in screw connection with an oil distributor 17 through centering round holes on the rotary worktable 23 and a bridge plate rotary worktable connecting disc 16;
the wedge spring centering mechanism consists of a floating wedge 4, a spring 34, a retainer ring 41, a tensioning screw 27, a centering wedge 30, a wedge guide sleeve 29, a first return spring 40A and a first plug wire 35A; the floating wedge 4 is in a U-shaped structure when viewed from the top and is used for avoiding the hydraulic cylinder seat 33 in the middle; the upper end part of the floating wedge block 4 is in a trapezoidal structure when viewed from the front, two inclined planes of the trapezoid are in sliding contact with the inclined planes of the centering wedge block 30, the lower part of the floating wedge block 4 is provided with three supporting feet 42 which are distributed triangularly and have square sections, the end parts of the supporting feet are provided with threaded holes, the three supporting feet 42 with the square structures can slide in three square holes 46 (positioning holes on the bridge plate 22) on the bridge plate 22, a plurality of springs 34 are arranged between the floating wedge block 4 and the bridge plate 22, and the tensioning screw 27 tensions the floating wedge block 4 through a gasket 41 and can be adjusted to a proper position; the wedge block guide sleeve 29 is fixed on the bridge plate 22 through a fastening screw 45, a square hole 43 is formed in the upper end of the wedge block guide sleeve 29 so that the centering wedge block 30 can slide in the direction parallel to the bridge plate 22, and a first return spring 40A and a first blocking wire 35A can be installed on the wedge block guide sleeve 29 so that the inclined plane of the positioning wedge block 30 is always attached to the inclined plane of the floating wedge block 4;
two groups of wedge block oil cylinder tensioning and positioning mechanisms are arranged on two sides symmetrical to the workpiece, and each wedge block oil cylinder tensioning and positioning mechanism consists of a tensioning mechanism shell 3, a tensioning wedge block 9, a single-action hydraulic cylinder 36, an inclined plane ejector rod 38, a second return spring 40B and a second blocking wire 35B; one end of the shell 3 of the tightening mechanism is of a rectangular structure, the other end of the shell is of an arc structure, a square hole 44 is formed in the circle center of one end of the arc structure and used for installing the tightening wedge block 9, and a circular stepped hole 39 is formed in the bottom of one end of the rectangular structure and communicated with a guide hole above the rectangular structure; the single-acting hydraulic cylinder 36 is installed on the bridge plate 22 through threads, the shell 3 of the tightening mechanism covers the single-acting hydraulic cylinder 36 and is connected with a square positioning hole formed in the bridge plate 22 through a positioning screw, a piston rod 37 of the single-acting hydraulic cylinder in the shell 3 of the tightening mechanism is provided with an inclined plane ejector rod 38, the inclined plane ejector rod 38 is of a cylindrical structure, and the upper end of the inclined plane ejector rod is provided with an inclined plane which forms an angle of 45 degrees with the central line of the inclined plane ejector rod; during operation, a piston rod 37 of the single-acting hydraulic cylinder pushes a slope ejector rod 38, the slope ejector rod 38 pushes the tightening wedge block 9, the slope of the slope ejector rod 38 is in contact with the slope at the lower part of the tightening wedge block 9 and can push the tightening wedge block 9 to move along the central line direction of a square hole 44 of the shell 3 of the tightening mechanism so as to tighten a workpiece; during oil return, a piston rod 37 of the single-acting hydraulic cylinder retracts, the inclined plane mandril 38 falls down, and the tightening wedge block 9 retracts under the action of a second return spring 40B so as to loosen the workpiece;
the floating support pressing mechanism has two parts in total and consists of two support hydraulic cylinders 6 and a floating support cylinder 20; the piston rods of the supporting hydraulic cylinder 6 and the floating supporting cylinder 20 are in a descending state in an initial state, oil pressure is supplied to enable the piston rods to ascend and contact any position of a workpiece, and then the piston rods stop, and meanwhile clamping force of the oil pressure acting on a jacket is applied to the piston rods, so that the piston rods can stably support the workpiece; the external thread of the floating supporting cylinder 20 is connected in the internal thread of the bridge plate 22, the oil path is led out from the lower bottom surface of the bridge plate 22, the oil path is used for matching three fixed bearings (two fixed supporting blocks 28 and one fixed supporting seat 21) of a workpiece, and when the workpiece is placed on the three fixed bearings and is pressed tightly, the floating supporting cylinder 20 acts and is pressed tightly; the workpiece is fixed on the four supports without tilting, so that the clamping force of the workpiece is improved; the two supporting hydraulic cylinders 6 are respectively fixed in threaded fixing holes at two ends of the supporting hydraulic cylinder base 5 through threads;
a fifth corner hydraulic cylinder 11E of the corner oil cylinder pressing mechanism is fixed on a hydraulic cylinder seat 33 through a middle hole of a supporting hydraulic cylinder seat 5 and a round hole on a bridge plate 22, the hydraulic cylinder seat 33 is fixed on the lower bottom surface of the bridge plate 22 in a threaded manner, and a piston rod of the fifth corner hydraulic cylinder 11E is additionally provided with a connecting rod 7 to be connected with a third pressing plate 8; during action, piston rods of the two supporting hydraulic cylinders 6 are ejected out to contact two narrow ribs on a workpiece and are hydraulically locked, and the fifth corner hydraulic cylinder 11E then acts to drive the third pressing plate 8 to rotate by 90 degrees through the connecting rod 7 and descend to press the workpiece.
The action process of the machining clamp of the disc brake bracket of the invention is as follows:
firstly, a workpiece (a disc brake bracket) is placed on a fixed supporting block 28 on a bridge plate 22 and a locating pin of a fixed supporting seat 21, and a wedge spring centering mechanism is forcibly pushed to axially center the workpiece;
secondly, a single-action hydraulic cylinder 36 in the two wedge block oil cylinder tensioning and positioning mechanisms moves to push an inclined plane mandril 38 to push out the tensioning wedge block 9 and tightly brace the inner cavity of the workpiece, so that the workpiece is positioned and tensioned in the direction vertical to the rotating shaft;
thirdly, the first corner hydraulic cylinder 11A, the second corner hydraulic cylinder 11B and the third corner hydraulic cylinder 11C act, and a first pressing plate 12A of the first corner hydraulic cylinder 11A and the second corner hydraulic cylinder 11B and a second pressing plate 12B of the third corner hydraulic cylinder 11C rotate by 90 degrees and are pressed tightly, so that the workpiece is positioned and pressed tightly in the vertical direction perpendicular to the rotating shaft;
fourthly, the floating supporting cylinder 20 acts to lock pressure after being ejected to a position, and the supporting effect of a fourth point is achieved;
fifthly, the fourth corner hydraulic cylinder 11D acts, a second pressing plate 12B of the fourth corner hydraulic cylinder 11D rotates by 90 degrees and presses a fourth point tightly, and a workpiece is placed and fixed;
sixthly, the two supporting hydraulic cylinders 6 act to support and lock positions;
seventhly, the fifth corner hydraulic cylinder 11E acts, rotates and presses down to reduce vibration of the workpiece in the machining process and improve machining precision;
and eighthly, after the workpiece is machined, all the oil cylinders act to loosen the workpiece, and the workpiece is manually taken out.
The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a add clamping apparatus of disc brake bracket which characterized in that: the device comprises a bridge plate, a tailstock and a rotary worktable which are movably arranged on two sides of the bridge plate, a hydraulic clamping assembly arranged on the bridge plate, an oil supply system connected with the hydraulic clamping assembly, and a servo motor in transmission connection with the rotary worktable through a worm gear; the servo motor is controlled with the machine tool on line;
the hydraulic clamping assembly consists of a wedge spring centering mechanism, a wedge oil cylinder supporting and positioning mechanism, a floating support pressing mechanism and a corner oil cylinder pressing mechanism;
the wedge spring centering mechanism comprises a floating wedge block arranged in the center of the front side of the bridge plate, centering wedge blocks in sliding connection with two sides of the floating wedge block, and wedge block guide sleeves fixed with the bridge plate through fastening screws; a plurality of springs are arranged between the floating wedge block and the bridge plate; three supporting legs which are distributed in a triangular shape and have square sections are integrally fixed at the lower part of the floating wedge block; the supporting legs are movably inserted into three square holes formed in the bridge plate; the lower end parts of the supporting legs are provided with threaded holes; a tensioning screw is arranged in the threaded hole in a threaded manner; the tensioning screw tensions the floating wedge block through the check ring; the upper end of the wedge block guide sleeve is provided with a square hole for guiding the centering wedge block to slide along the direction parallel to the bridge plate; a first return spring and a first plugging wire are arranged in a square hole of the wedge block guide sleeve; one end of the first return spring is connected with the first plugging wire, and the other end of the first return spring is connected with the centering wedge block;
the wedge block oil cylinder tensioning and positioning mechanisms are symmetrically arranged on two sides of the wedge spring centering mechanism; each wedge block oil cylinder tensioning and positioning mechanism comprises a tensioning mechanism shell, a single-action hydraulic cylinder, an inclined plane ejector rod and a tensioning wedge block, wherein the single-action hydraulic cylinder is arranged on the bridge plate in a threaded mode, the inclined plane ejector rod is connected with a piston rod of the single-action hydraulic cylinder, and the tensioning wedge block is movably contacted with the other end of the inclined plane ejector rod; the inclined surface ejector rod is of a cylindrical structure, and an inclined surface with a 45-degree central line is formed on the upper end surface of the inclined surface ejector rod in a processing mode; the inclined plane is contacted with the inclined plane at the lower part of the tightening wedge block; the shell of the tightening mechanism covers the upper part of the single-action hydraulic cylinder and is connected with a square positioning hole arranged on the bridge plate through a positioning screw; the upper end of the shell of the tightening mechanism is of an arc structure, and a square hole for installing a tightening wedge block is axially formed along the circle center of the shell; a second return spring and a second plug wire are arranged in the square hole; one end of the second reset spring is connected with the second plugging wire, and the other end of the second reset spring is connected with the tensioning wedge block; the lower end of the shell of the tightening mechanism is of a rectangular structure, and a circular stepped hole is formed in the height direction of the shell of the tightening mechanism; the circular stepped hole is communicated with a guide hole which is arranged above the circular stepped hole and used for guiding the inclined surface mandril to move;
the floating support pressing mechanism consists of two symmetrically arranged support hydraulic cylinders and a floating support cylinder; the two supporting hydraulic cylinders are respectively connected with the bridge plate through supporting hydraulic cylinder seats; the floating support cylinder is in threaded connection with a threaded mounting hole formed in the bridge plate;
the corner oil cylinder pressing mechanism consists of a first corner hydraulic cylinder, a second corner hydraulic cylinder, a third corner hydraulic cylinder, a fourth corner hydraulic cylinder and a fifth corner hydraulic cylinder; the first corner hydraulic cylinder, the second corner hydraulic cylinder, the third corner hydraulic cylinder and the fourth corner hydraulic cylinder are respectively fixed on the bridge plate through corner hydraulic cylinder seats; the first corner hydraulic cylinder and the second corner hydraulic cylinder are symmetrically arranged on two sides of the wedge spring centering mechanism; the third corner hydraulic cylinder and the fourth corner hydraulic cylinder are symmetrically arranged on the rear side of the wedge block oil cylinder tensioning and positioning mechanism; the fifth corner hydraulic cylinder is arranged in the center of the two supporting hydraulic cylinders and is fixed on the hydraulic cylinder seat through a middle hole arranged on the supporting hydraulic cylinder seat and a round hole arranged on the bridge plate; the hydraulic cylinder seat is fixed on the lower bottom surface of the bridge plate through threads; a piston rod of the first corner hydraulic cylinder and a piston rod of the second corner hydraulic cylinder are respectively fixed with a first pressing plate; a piston rod of the third corner hydraulic cylinder and a piston rod of the fourth corner hydraulic cylinder are respectively fixed with a second pressing plate; and a piston rod of the fifth corner hydraulic cylinder is connected with a third pressing plate through a connecting rod.
2. The machining jig for a disc brake bracket according to claim 1, characterized in that: a fixed support assembly is also fixed on the bridge plate; the fixed supporting assembly consists of two fixed supporting blocks and a fixed supporting seat; the two fixed supporting blocks are respectively arranged at the front sides of the two wedge block oil cylinder tensioning and positioning mechanisms; the fixed supporting seat and the floating supporting cylinder are symmetrically arranged on the rear sides of the two wedge block oil cylinder tightening positioning mechanisms respectively.
3. The machining jig for a disc brake bracket according to claim 1, characterized in that: the end face of the floating wedge block is of a U-shaped structure, and the upper part of the front face of the floating wedge block is of a trapezoidal structure.
4. The machining jig for a disc brake bracket according to claim 1, characterized in that: the two supporting hydraulic cylinders are respectively fixed in two threaded fixing holes arranged on the supporting hydraulic cylinder base in a threaded manner.
5. The machining jig for a disc brake bracket according to claim 1, characterized in that: a tailstock bridge plate connecting disc and a bridge plate rotary worktable connecting disc are respectively arranged on two sides of the bridge plate; the tailstock bridge plate connecting disc is fixedly connected with a tailstock rotary disc arranged on the inner side of the tailstock; and the bridge plate rotary table connecting disc is fixedly connected with a rotary table turntable arranged on the inner side of the rotary table.
6. The machining jig for a disc brake bracket according to claim 1 or 5, characterized in that: and a centering round hole which is arranged in the same axis and used for centering installation of the tailstock bridge plate connecting disc and the bridge plate rotating table connecting disc and the bridge plate is respectively arranged between the rotating table and the tailstock.
7. The machining jig for a disc brake bracket according to claim 1, characterized in that: the bridge plate is a rectangular steel plate, and two ends of the bridge plate in the length direction are respectively provided with two square tenon joints for being in plug-in connection with square through holes arranged on a tailstock bridge plate connecting disc and a bridge plate rotary working table connecting disc; and a clamp tool setting hole with a circular structure is formed between the third corner hydraulic cylinder and the fourth corner hydraulic cylinder on the bridge plate.
8. The machining jig for a disc brake bracket according to claim 1, characterized in that: the oil supply system comprises an oil way rotary joint connected with an external hydraulic station, an oil distributor connected with the oil way rotary joint, an oil channel plate connected with the oil distributor through an oil pipe joint, and a plurality of oil pipes connected with the oil channel plate; and the other ends of the oil pipes are respectively connected with the supporting hydraulic cylinder, the first corner hydraulic cylinder, the fifth corner hydraulic cylinder, the floating supporting cylinder and the single-action hydraulic cylinder.
9. The machining jig for a disc brake bracket according to claim 8, characterized in that: an outer oil port used for being connected with an external oil path is arranged on the excircle of the head part of the oil path rotary joint, and an inner oil port used for being communicated with the outer oil port is arranged on the end face of the tail part of the oil path rotary joint; the head of the oil path rotary joint is connected with the base of the rotary worktable through a rotary joint fixing disc and a key; the tail part of the oil way rotary joint sequentially penetrates through centering round holes arranged in the centers of the rotary working table and the bridge plate rotary working table connecting disc and is connected with the oil distributor through screws.
10. The machining jig for a disc brake bracket according to claim 1, characterized in that: lifting rings are respectively fixed on the upper top surface of the tailstock and the upper top surface of the rotary worktable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010016781.9A CN110936204B (en) | 2020-01-08 | 2020-01-08 | Machining clamp for disc brake bracket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016781.9A CN110936204B (en) | 2020-01-08 | 2020-01-08 | Machining clamp for disc brake bracket |
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| CN110936204A true CN110936204A (en) | 2020-03-31 |
| CN110936204B CN110936204B (en) | 2024-05-28 |
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| CN202010016781.9A Active CN110936204B (en) | 2020-01-08 | 2020-01-08 | Machining clamp for disc brake bracket |
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| CN113118803A (en) * | 2021-03-22 | 2021-07-16 | 陕西法士特齿轮有限责任公司 | Thin-wall part positioning and machining tool and method |
| CN113579809A (en) * | 2021-08-02 | 2021-11-02 | 天润工业技术股份有限公司 | Large-scale engine bearing cap processing frock |
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| CN114734390A (en) * | 2022-04-29 | 2022-07-12 | 浙江天元科技股份有限公司 | Work fixture of bracket in disc brake |
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