CN117680965A - An installation device for steering gear extension rods - Google Patents
An installation device for steering gear extension rods Download PDFInfo
- Publication number
- CN117680965A CN117680965A CN202311718947.1A CN202311718947A CN117680965A CN 117680965 A CN117680965 A CN 117680965A CN 202311718947 A CN202311718947 A CN 202311718947A CN 117680965 A CN117680965 A CN 117680965A
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- assembly
- rack
- extension rod
- positioning
- clamping
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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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
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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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
- B23P19/006—Holding or positioning the article in front of the applying tool
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- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention relates to the technical field of steering systems, in particular to a mounting device for an extension rod of a steering engine. The utility model provides a erection equipment for steering gear extension rod, includes frame, its characterized in that: the frame is provided with a working platform, the working platform is connected with a transmission line, and the transmission line is connected with a steering machine workpiece positioning tray; the feeding mechanism assembly is arranged on the working platform positioned in front of the steering workpiece positioning tray, the pressing mechanism assembly is arranged on the working platform positioned behind the steering workpiece positioning tray, and the left side and the right side of the pressing mechanism assembly are respectively provided with a left side rack and a shell clamping and positioning mechanism and a right side rack and a shell clamping and positioning mechanism. Compared with the prior art, the automatic assembly device effectively solves the problem of automatic assembly of the extension rod product of the steering gear, and the tooling design is flexible and matched with a multi-axis moving servo, so that the assembly requirements of products of different types are met; the positioning accuracy of the tool and the design logic of the process control are reasonable, and the stability of assembly is ensured.
Description
Technical Field
The invention relates to the technical field of steering systems, in particular to a mounting device for an extension rod of a steering engine.
Background
After the short body of the steering gear has been assembled, an extension rod needs to be mounted on the input shaft of the sensor unit, with the following requirements: firstly, adjusting a steering gear rack to a middle position, ensuring that the distance from the end face of the rack to the hard limit of a shell is the same at two ends, then pressing the extension rod into an input shaft according to the installation depth, angle and force of the extension rod required by a drawing, and finally riveting two points of the extension rod according to the riveting point position, depth and force required by the drawing. The special plane equipment is required to monitor and judge a plurality of key parameters shown in the figure 1, so that the qualified steering gear meeting the drawing requirements can be assembled, and the right and left steering angles of the steering wheel can be the same when the special plane equipment is installed and debugged on the whole vehicle.
Based on the strict product design requirement of the extension rod, and the mass, pipelining and stable quality control of part of the process are difficult to realize by manual operation, the special equipment for installing the extension rod aims to realize the automatic installation and process monitoring of the extension rod so as to achieve the assembly result to meet the requirement of the product drawing design,
disclosure of Invention
The invention provides the mounting equipment for the extension rod of the steering gear, which aims to overcome the defects of the prior art and effectively solve the problem of automatic assembly of the extension rod product of the steering gear.
In order to achieve the above purpose, a mounting device for a steering gear extension rod is designed, which comprises a frame and is characterized in that: the frame is provided with a working platform, the working platform is connected with a transmission line, and the transmission line is connected with a steering machine workpiece positioning tray; a feeding mechanism assembly is arranged on a working platform positioned in front of the steering workpiece positioning tray, a pressing mechanism assembly is arranged on a working platform positioned behind the steering workpiece positioning tray, and left and right sides of the pressing mechanism assembly are respectively provided with a left rack and shell clamping and positioning mechanism and a right rack and shell clamping and positioning mechanism;
the pressing mechanism assembly comprises a pressing mechanism base, a pressing mechanism back-and-forth movement servo assembly, a pressing mechanism left-and-right movement servo assembly, a pressing mechanism angle swinging servo assembly, a pressing mechanism up-and-down movement servo assembly, a Kistler press, a floating mechanism assembly and a C-shaped frame riveting point assembly, wherein the bottom of the pressing mechanism base is fixedly connected with a working platform, the pressing mechanism base is connected with the bottom of a first connecting bracket through the pressing mechanism back-and-forth movement servo assembly, the top of the first connecting bracket is connected with the bottom of a second connecting bracket through the pressing mechanism left-and-right movement servo assembly, the top of the second connecting bracket is provided with the pressing mechanism angle swinging servo assembly, the front end of the pressing mechanism angle swinging servo assembly is connected with the pressing mechanism up-and-down movement servo assembly through a third connecting bracket, the front end of the pressing mechanism up-and-down movement servo assembly is connected with a press connecting seat, the upper part of the pressing mechanism connecting seat is connected with the Kistler press, the pressing head of the Kistler press is connected with the floating mechanism assembly, and the C-shaped frame riveting point assembly is arranged below the floating mechanism assembly;
the bottom of the steering machine workpiece positioning tray is provided with a jacking mechanism;
the working flow of the installation equipment is as follows:
s1, turning a workpiece of a steering machine on a positioning tray of the workpiece of the steering machine of a transmission line, stopping the positioning tray of the workpiece of the steering machine when the workpiece of the steering machine turns to an installation station, and lifting the positioning tray of the workpiece of the steering machine to a designated position by a jacking mechanism;
s2, clamping the left side rack and the shell, clamping the right side rack and the shell, and positioning the shell of the steering gear workpiece by the positioning mechanism;
s3, a left side rack and shell clamping and positioning mechanism and a right side rack and shell clamping and positioning mechanism drive a push rod in a steering machine workpiece to push the rack, a grating ruler of the left side rack and shell clamping and positioning mechanism records the position of the rack in real time, and finally the rack is positioned at a middle position with equal limiting distance from the inside of the shell;
s4, an operator manually picks up an extension rod, the extension rod is placed on a positioning tool of a feeding mechanism assembly, the feeding mechanism assembly is automatically transmitted to a pushing mechanism assembly, a floating mechanism assembly on the pushing mechanism assembly positions the extension rod, an extension rod angle servo assembly on the pushing mechanism assembly circumferentially rotates the extension rod to an installation angle, and a claw on the floating mechanism assembly clamps the extension rod;
s5, a pushing mechanism of a pushing mechanism assembly moves a servo assembly forwards and backwards, a pushing mechanism moves a servo assembly leftwards and rightwards, a pushing mechanism moves a servo assembly to swing an angle, and a pushing mechanism moves a servo assembly upwards and downwards to drive an extension rod to move to an installation angle and a position, an input shaft clamping claw on a floating mechanism assembly clamps the input shaft, the floating mechanism assembly pre-presses an external spline of the input shaft, the extension rod angle servo assembly slightly rotates the extension rod, the dead weight of a floating pressure head is utilized to achieve internal and external spline recognition, a Kistler press starts to press the extension rod to a set position after a recognition in-place signal is triggered, and in the press mounting process, a Kistler monitoring instrument acquires displacement and force data in real time and performs qualification judgment;
s6, tightly attaching a rivet tool on the riveting point assembly of the C-shaped frame to an extension rod, pressurizing a TOX riveting cylinder to a set riveting pressure, finishing riveting two points, and acquiring displacement and force data in real time by a Kistler monitoring instrument in the riveting process and performing qualification judgment;
and S7, after the technological process is finished, the equipment automatically returns to the original position, and the finished product of the qualified assembled steering gear workpiece is released to the next station.
The floating mechanism assembly comprises an extension rod angle servo assembly, a servo transmission belt pulley assembly, an extension rod profiling sleeve tool, an extension rod clamping jaw and an extension rod clamping cylinder, wherein the extension rod angle servo assembly is arranged on one side of a pressure head of the Kistler press, the bottom of the extension rod angle servo assembly is connected with a rotating shaft through the servo transmission belt pulley assembly, the bottom of the rotating shaft is connected with the extension rod profiling sleeve tool, the extension rod clamping jaw is arranged below the extension rod profiling sleeve tool, and the rear part of the extension rod clamping jaw is connected with the extension rod clamping cylinder.
The upper part of the rotating shaft is connected with the rotating disc in a shaft way, and an angle signal detection sensor is arranged above the rotating disc; the top of the rotating shaft is connected with the pressure head in a floating way through a spring.
The floating mechanism component is in sliding connection with the press connecting seat through the sliding block component.
The C-shaped frame riveting point assembly comprises a TOX riveting cylinder, a riveting pressure acquisition sensor, a riveting head, a riveting point depth acquisition displacement sensor, a C-shaped frame and a TOX riveting cylinder moving cylinder, wherein the C-shaped frame is arranged at the lower part of a press connecting seat, the bottom of the C-shaped frame is connected with the TOX riveting cylinder moving cylinder through a sliding block assembly, and the TOX riveting cylinder moving cylinder is fixedly connected with the press connecting seat; the left and right ends of the inner side of the C-shaped frame are respectively provided with a left rivet and a right rivet, the right rivet is fixedly connected with the C-shaped frame, and the tail part of the left rivet penetrates through the C-shaped frame and is connected with a piston rod of the TOX riveting cylinder; the upper part between the left rivet and the piston rod of the TOX rivet cylinder is provided with a rivet pressure acquisition sensor, and the C-shaped frames on the upper sides of the left rivet and the right rivet are provided with rivet point depth acquisition displacement sensors.
One end of the input shaft clamping claw is arranged below the left rivet head and the right rivet head, the other end of the input shaft clamping claw is connected with the claw clamping cylinder, and the claw clamping cylinder is fixedly connected with the press connecting seat.
The feeding mechanism assembly comprises a feeding mechanism base, a left-right translation cylinder, a sliding table assembly, a double-layer front-back movement cylinder, a sliding table assembly, a lifting cylinder, a sliding table assembly, a support frame, an extension rod V-shaped positioning block, an extension rod supporting block, clamping jaws, clamping cylinders and rotating cylinders, wherein the bottom of the feeding mechanism base is fixedly connected with a working platform, the feeding mechanism base is respectively connected with the bottom surface and the side surface of the double-layer front-back movement cylinder, the sliding table assembly and the lifting cylinders through the left-right translation cylinder, the sliding table assembly, the double-layer front-back movement cylinder and the sliding table assembly, the top of the double-layer front-back movement cylinder and the sliding table assembly is connected with a support frame, one side of the top of the support frame is provided with the extension rod V-shaped positioning block, one side of the extension rod supporting block is provided with clamping jaws, the bottom of each clamping jaw is connected with the rotating cylinders, and the rotating cylinders are connected with the support frame.
Opposite-irradiation photoelectric sensors are respectively arranged at two sides of the top of the V-shaped positioning block of the extension rod.
The left side rack and the shell are clamped, and the positioning mechanism is consistent with the right side rack and the shell in structure; the right side rack and casing clamp, positioning mechanism include rack and casing location base, rack and casing location precursor cylinder, rack and casing location precursor slide rail, rack and casing location connecting plate, casing clamp drive servo motor assembly, rack and casing location clamp slide rail, casing clamp connecting plate, rack ejector pin drive servo motor assembly, grating chi, rack location frock, casing clamp frock, the bottom and the work platform fixed connection of rack and casing location base are equipped with rack and casing location precursor slide rail on the rack and casing location base, sliding connection rack and casing location connecting plate on rack and the casing location precursor slide rail, the rear end and the rack and the casing location front drive cylinder of casing location connecting plate are connected, the front end and the rack ejector pin drive servo motor assembly of rack ejector pin drive connecting plate are connected, the place ahead one side of casing clamp connecting plate is equipped with rack ejector pin drive servo motor assembly, rack ejector pin drive servo motor assembly passes through the one end that the slider assembly connects the location frock, the other end that the rack clamp frock was located to the other end that the rack was located the rack location frock is equipped with grating chi.
One end of the shell clamping tool is connected with the rack positioning tool, and the other end of the shell clamping tool transversely penetrates through the shell clamping connecting plate and is positioned on the outer side of the shell clamping connecting plate.
Compared with the prior art, the invention provides the mounting equipment for the extension rod of the steering engine, which effectively solves the problem of automatic assembly of the extension rod product of the steering engine, and meets the assembly requirements of products of different models by designing flexibility of the fixture and matching with a multi-axis moving servo; the positioning of the tool is accurate, the process control design logic is reasonable, and the assembly stability is ensured; meanwhile, the quality requirements of assembled products are guaranteed aiming at detection, monitoring and judgment of a plurality of key parameters.
Drawings
FIG. 1 is a schematic illustration of an extension rod press-fit to a steering engine component.
Fig. 2 is a schematic overall view of the structure of the present invention.
Fig. 3 is a flow chart of the operation of the present invention.
Fig. 4 is a perspective view of a feeding mechanism assembly in the present invention.
Fig. 5 is an enlarged partial schematic view of fig. 4.
Fig. 6 is a perspective view of the left side rack and housing clamping and positioning mechanism and the right side rack and housing clamping and positioning mechanism in the present invention.
Fig. 7 is a perspective view of the right rack and housing clamping and positioning mechanism.
Fig. 8 is a front view of the right rack and housing clamping and positioning mechanism.
Fig. 9 is a top view of the right rack and housing clamping and positioning mechanism.
Fig. 10 is a flow chart of the clamping and positioning of the rack and the housing.
Fig. 11 is a perspective view of the structure of the pressing mechanism assembly in the present invention.
Fig. 12 is a schematic view of the floating mechanism assembly in the pressing mechanism assembly.
Fig. 13 is an enlarged partial schematic view of fig. 12.
Fig. 14 is an enlarged schematic view of a in fig. 13.
Fig. 15 is an enlarged schematic view of B in fig. 13.
Fig. 16 is a schematic view of a C-shaped rivet assembly of the pressing mechanism assembly.
FIG. 17 is a schematic view of the structure of the rivet in the C-shaped bracket rivet point assembly.
FIG. 18 is a schematic illustration of the input shaft clamping structure in a C-frame rivet point assembly.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, after the short body of the steering gear is assembled, an extension rod is required to be mounted on the input shaft of the sensor unit, and the mounting requirements are as follows: firstly, adjusting a steering gear rack to a middle position, ensuring that the distance from the end face of the rack to the hard limit of a shell is the same at two ends, then pressing the extension rod into an input shaft according to the installation depth, angle and force of the extension rod required by a drawing, and finally riveting two points of the extension rod according to the riveting point position, depth and force required by the drawing. The special plane equipment must monitor and judge several key parameters to assemble the qualified steering gear meeting the drawing requirement, and the steering wheel angle in the left and right directions can be the same when the steering gear is installed and debugged on the whole vehicle.
As shown in fig. 2, a working platform 2 is arranged on a frame 1, a transmission line 3 is connected to the working platform 2, and a steering work piece positioning tray 4 is connected to the transmission line 3; a feeding mechanism assembly 6 is arranged on the working platform 2 positioned in front of the steering workpiece positioning tray 4, a pressing mechanism assembly 7 is arranged on the working platform 2 positioned behind the steering workpiece positioning tray 4, and left side racks and shell clamping and positioning mechanisms 8 and right side racks and shell clamping and positioning mechanisms 9 are respectively arranged on the left side and the right side of the pressing mechanism assembly 7; the bottom of the steering machine workpiece positioning tray 4 is provided with a jacking mechanism.
As shown in fig. 3, the working flow of the installation device of the present invention is as follows:
s1, turning a steering machine workpiece 5 on a steering machine workpiece positioning tray 4 of a transmission line 3, stopping the steering machine workpiece positioning tray 4 when the turning is turned to an installation station, and lifting the steering machine workpiece positioning tray 4 to a specified position by a jacking mechanism;
s2, a left rack and shell clamping and positioning mechanism 8 and a right rack and shell clamping and positioning mechanism 9 are used for positioning and clamping the shell of the steering gear workpiece 5;
s3, a left side rack and shell clamping and positioning mechanism 8 and a right side rack and shell clamping and positioning mechanism 9 drive a push rod in a steering engine workpiece 5 to push the rack, a grating ruler of the left side rack and shell clamping and positioning mechanism 8 records the position of the rack in real time, and finally the rack is positioned at a middle position with equal limiting distance from the inside of the shell;
s4, an operator manually picks up an extension rod 10, places the extension rod 10 on a positioning tool of the feeding mechanism assembly 6, the feeding mechanism assembly 6 is automatically transmitted to the pushing mechanism assembly 7, the extension rod 10 is positioned by a floating mechanism assembly 7-7 on the pushing mechanism assembly 7, the extension rod 10 is circumferentially rotated to an installation angle by an extension rod angle servo assembly 7-7-1 on the pushing mechanism assembly 7, and a claw on the floating mechanism assembly 7-7 clamps the extension rod 10;
s5, a pushing mechanism of a pushing mechanism assembly 7 moves a servo assembly 7-2 forwards and backwards, a pushing mechanism moves a servo assembly 7-3 leftwards and rightwards, a pushing mechanism swings the servo assembly 7-4 at an angle and drives an extension rod 10 to move to an installation angle and a position, an input shaft clamping claw 7-8-8 on a floating mechanism assembly 7-7 clamps an input shaft, the floating mechanism assembly 7-7 pre-presses an external spline of the input shaft, the extension rod angle servo assembly 7-7-1 slightly rotates an extension rod, the dead weight of a floating pressure head is utilized to achieve internal and external spline recognition, a Kistler press 7-6 starts to press the extension rod 10 to a set position after a recognized in-place signal is triggered, and in the press mounting process, a Kistler monitoring instrument acquires displacement and force data in real time and performs qualification judgment;
s6, tightly attaching a rivet tool on the C-shaped frame riveting point assembly 7-8 to the extension rod 10, pressurizing the TOX riveting cylinder 7-8-1 to a set riveting pressure to finish riveting two points, and acquiring displacement and force data in real time by a Kistler monitoring instrument in the riveting process and performing qualification judgment;
and S7, after the technological process is finished, the equipment automatically returns to the original position, and the finished product of the qualified assembled steering gear workpiece is released to the next station.
1. Feeding mechanism assembly
As shown in fig. 4 and 5, the feeding mechanism assembly 6 comprises a feeding mechanism base, a left translation cylinder, a right translation cylinder, a sliding table assembly, a double-layer front and back movement cylinder, a sliding table assembly, a lifting cylinder, a sliding table assembly, a support frame, an extension rod V-shaped positioning block, an extension rod supporting block, clamping jaws, a clamping cylinder and a rotating cylinder, wherein the bottom of the feeding mechanism base 6-1 is fixedly connected with the working platform 2, the feeding mechanism base 6-1 is respectively connected with the double-layer front and back movement cylinder and the sliding table assembly 6-3 through the left translation cylinder, the sliding table assembly 6-2 and the lifting cylinder, the sliding table assembly 6-4, the double-layer front and back movement cylinder and the top of the sliding table assembly 6-3 are connected with the support frame 6-5, one side of the top of the support frame 6-5 is provided with the extension rod V-shaped positioning block 6-10, one side of the top of the support frame 6-5 is provided with the clamping jaws 6-8, the bottom of the clamping jaws 6-8 is connected with the clamping jaws 6-7, and the clamping cylinders 6-7 are connected with the rotating cylinder 6-6, and the rotating cylinder 6-5 is connected with the support frame 6-5.
Opposite-irradiation photoelectric sensors 6-11 are respectively arranged on two sides of the top of the V-shaped positioning block 6-10 of the extension rod.
In the working process, an operator places the extension rod 10 into the V-shaped positioning block 6-10 and the support block 6-9 of the extension rod, a button is started, the opposite-irradiation photoelectric sensor 6-11 detects whether the placement angle of the extension rod 10 is correct, the clamping cylinder 6-7 clamps the extension rod 10, the extension rod 10 is in a vertical state after the rotating cylinder 6-6 rotates by 90 degrees, the extension rod 10 is automatically conveyed to the pushing mechanism assembly 7 to wait for grabbing through the left-right translation cylinder, the sliding table assembly 6-2, the lifting cylinder and the sliding table assembly 6-4, the walking distance of the operator is reduced by adopting the translation cylinder with a long stroke, and meanwhile, the automatic conveying distance of the extension rod 10 is increased by using the double-layer front-back movement cylinder and the sliding table assembly 6-3. The extension rod V-shaped positioning block 6-10 and the extension rod support block 6-9 define the placement state of the extension rod 10, and detect whether this placement state is correct by the pair of photoelectric sensors 6-11.
2. Left side rack and shell clamping, positioning mechanism and right side rack and shell clamping, positioning mechanism
As shown in fig. 6 to 10, the left-side rack and housing clamping and positioning mechanism 8 is identical to the right-side rack and housing clamping and positioning mechanism 9 in structure; the right side rack and shell clamp, positioning mechanism 9 include rack and shell location base, rack and shell location precursor cylinder, rack and shell location precursor slide rail, rack and shell location connecting plate, shell clamp drive servo motor subassembly, rack and shell location clamp slide rail, shell clamp connecting plate, rack ejector pin drive servo motor subassembly, grating chi, rack location frock, shell clamp frock, the bottom and the work platform 2 fixed connection of rack and shell location base 9-1, be equipped with rack and shell location precursor slide rail 9-3 on rack and shell location base 9-1, sliding connection rack and shell location precursor slide rail 9-3 is last to be connected rack and shell location connecting plate 9-4, the rear end and the rack and shell location precursor cylinder 9-2 of rack and shell location connecting plate 9-4 are connected, the front end and the rack ejector pin drive servo motor subassembly 9-5 of rack ejector pin drive servo motor subassembly 9-5 are connected with shell clamp connecting plate 9-6 through the slider subassembly, one side in the place ahead of rack and shell clamp connecting plate 9-6 is equipped with servo motor subassembly 9-7, rack and rack 9-9 side is connected with the other end of the grating servo frock 9-9 through the slider subassembly, rack 9-9 side of being located after the rack is connected with the rack ejector pin drive servo motor subassembly 9-8.
One end of the shell clamping tool 9-10 is connected with the rack positioning tool 9-9, and the other end of the shell clamping tool 9-10 transversely penetrates through the shell clamping connecting plate 9-6 and is located on the outer side of the shell clamping connecting plate 9-6.
In the working process, the left side rack and the shell are clamped, the positioning mechanism 8 and the right side rack and the shell are clamped, the positioning mechanism 9 is integrally and forerunner to the same axis position of the front end shell, the left side rack and the shell are clamped, the positioning mechanism 8 and the right side rack and the shell are clamped, the positioning mechanism 9 clamps the shell under the driving of the rack ejector rod driving servo motor assembly on the left side and the right side, then the left side rack and the shell are clamped, the positioning mechanism 8 and the right side rack and the shell are clamped, the positioning mechanism 9 respectively moves the rack to the left side and the right side to the shell to limit under the driving of the rack ejector rod driving servo motor assembly on the left side and the right side, the position of the grating ruler is recorded respectively, and the closed loop feedback is fed back to the rack ejector rod driving servo to position the rack to the middle position.
As shown in fig. 10, which is a schematic illustration of a rack median adjustment process, a right servo-driven rack ejector rod tool pushes a rack until the ejector rod tool surface touches a limiting surface in a shell, then a left ejector rod tool abuts against the rack under servo driving, so that no gap between the rack and the ejector rod tools on two sides is ensured, the position is a first position, and a grating ruler records left and right positions A1/B1; the right ejector rod is retracted to the original position under the servo drive, the left ejector rod tool pushes the rack under the servo drive until the left ejector rod tool surface touches the limiting surface in the shell, then the right ejector rod tool is abutted against the rack under the servo drive, so that no gap is formed between the rack and the ejector rod tools at the two sides, the position is the second position, and the left position A2/B2 is recorded by the grating ruler; the left ejector rod is driven by a servo to retract to a grating ruler position A3, namely (A2-A1)/2, and then the right ejector rod tool pushes the rack to lean against the left ejector rod tool surface under the servo drive, so that the rack and the ejector rod tools on the two sides are ensured to be free of gaps, and the position is a position III. At this time, the distances between the two ends of the rack and the limiting surface in the shell are equal.
3. Pressing mechanism assembly
As shown in fig. 11 to 18, the pressing mechanism assembly 7 comprises a pressing mechanism base 7-1, a pressing mechanism front-back moving servo assembly 7-2, a pressing mechanism left-right moving servo assembly 7-3, a pressing mechanism angle swinging servo assembly 7-4, a pressing mechanism up-down moving servo assembly 7-5, a Kistler press 7-6, a floating mechanism assembly 7-7, a C-shaped frame riveting point assembly 7-8, the bottom of the pressing mechanism base 7-1 is fixedly connected with the working platform 2, the pressing mechanism base 7-1 is connected with the bottom of the connecting bracket 7-9 through the pressing mechanism front-back moving servo assembly 7-2, the top of the first connecting support 7-9 is connected with the bottom of the second connecting support 7-10 through a left-right moving servo assembly 7-3 of a pressing mechanism, the top of the second connecting support 7-10 is provided with a pressing mechanism angle swinging servo assembly 7-4, the front end of the pressing mechanism angle swinging servo assembly 7-4 is connected with the pressing mechanism up-down moving servo assembly 7-5 through a third connecting support 7-11, the front end of the pressing mechanism up-down moving servo assembly 7-5 is connected with a press connecting seat 7-12, the upper part of the press connecting seat 7-12 is connected with a Kistler press 7-6, a pressing head of the Kistler press 7-6 is connected with a floating mechanism assembly 7-7, and a C-shaped frame riveting point assembly 7-8 is arranged below the floating mechanism assembly 7-7.
The floating mechanism assembly 7-7 comprises an extension rod angle servo assembly, a servo transmission belt pulley assembly, an extension rod profiling sleeve tool, an extension rod clamping jaw and an extension rod clamping cylinder, wherein the extension rod angle servo assembly 7-7-1 is arranged on one side of a pressure head 7-6-1 of the Kistler press 7-6, the bottom of the extension rod angle servo assembly 7-7-1 is connected with a rotating shaft 7-7-5 through the servo transmission belt pulley assembly 7-7-2, the bottom of the rotating shaft 7-7-5 is connected with the extension rod profiling sleeve tool 7-7-4, the extension rod clamping jaw 7-7-6 is arranged below the extension rod profiling sleeve tool 7-7-4, and the rear part of the extension rod clamping jaw 7-7-6 is connected with the extension rod clamping cylinder 7-7-7. The upper part of the rotating shaft 7-7-5 is connected with a rotating disc 7-7-8 in a shaft way, and an angle signal detection sensor 7-7-9 is arranged above the rotating disc 7-7-8; the top of the rotating shaft 7-7-5 is connected with the pressure head 7-6-1 in a floating manner through a spring.
The floating mechanism assembly 7-7 is slidably connected to the press connection base 7-12 by a slider assembly.
The C-shaped frame riveting point assembly 7-8 comprises a TOX riveting cylinder, a riveting pressure acquisition sensor, a riveting head, a riveting point depth acquisition displacement sensor, a C-shaped frame and a TOX riveting cylinder moving cylinder, wherein the lower part of the press connecting seat 7-12 is provided with the C-shaped frame 7-8-6, the bottom of the C-shaped frame 7-8-6 is connected with the TOX riveting cylinder moving cylinder 7-8-7 through a sliding block assembly, and the TOX riveting cylinder moving cylinder 7-8-7 is fixedly connected with the press connecting seat 7-12; the left and right ends of the inner side of the C-shaped frame 7-8-6 are respectively provided with a left rivet 7-8-3 and a right rivet 7-8-4, the right rivet 7-8-4 is fixedly connected with the C-shaped frame 7-8-6, and the tail part of the left rivet 7-8-3 penetrates through the C-shaped frame 7-8-6 and is connected with a piston rod of the TOX riveting cylinder 7-8-1; the upper part between the left rivet head 7-8-3 and the piston rod of the TOX riveting cylinder 7-8-1 is provided with a riveting pressure acquisition sensor 7-8-2, and the C-shaped frames 7-8-6 positioned on the upper sides of the left rivet head 7-8-3 and the right rivet head 7-8-4 are provided with a rivet point depth acquisition displacement sensor 7-8-5. One end of an input shaft clamping jaw 7-8-8 is arranged below the left rivet head 7-8-3 and the right rivet head 7-8-4, the other end of the input shaft clamping jaw 7-8-8 is connected with a jaw clamping cylinder 7-8-9, and the jaw clamping cylinder 7-8-9 is fixedly connected with a press connecting seat 7-12.
The original position signal detection of the pushing mechanism angle swinging servo assembly 7-4 ensures that the initial angle of the extension rod profiling sleeve tool 7-7-4 is at a zero degree position, the Kistler press 7-6 drives the extension rod profiling sleeve tool 7-7-4 to move downwards, after the sleeve is taken in the extension rod 10, the pushing mechanism angle swinging servo assembly 7-4 rotates the extension rod 10 to a mounting angle, the extension rod clamping jaw 7-7-6 clamps the extension rod 10, the pushing mechanism assembly 7 is driven by a servo to move downwards to a set height, and the input shaft clamping jaw 7-8-8 clamps the input shaft (action: when the spline is pressed in the follow-up process, the pressing force is prevented from being transmitted to a sensor unit and a steering gear, products are protected and the pressing process is stabilized), the Kistler press 7-6 moves downwards to a pre-pressing state of the floating mechanism assembly 7-7, the extension rod angle servo assembly 7-7-1 slightly rotates clockwise/anticlockwise by a set angle, at the moment, spline recognition is realized by the self weight of the floating mechanism assembly 7-7, after a spline in-place signal is triggered by the self weight of the floating mechanism assembly 7-7, the PLC acquires angle data of the rotating servo at the moment, judges whether the angle data is in a set angle range or not, after the angle requirement is met, the Kistler press 7-6 drives the pressing head 7-6-1 to act on the top of the floating mechanism assembly 7-7, so that force is transmitted to the sleeve and the extension rod 10, the Kistler press 7-6 transmits the displacement and force data to the Kistler monitor instrument in real time until the set displacement-force curve function is generated, and whether the curve meets the requirement of a standard judging frame is judged after the pressing is finished, under the driving of a TOX riveting cylinder moving cylinder 7-8-7, a left riveting head 7-8-3 and a right riveting head 7-8-4 are enabled to be attached to an extension rod 10, the TOX riveting cylinder 7-8-1 is slowly pressurized to a set pressure under the hydraulic action, and in the process, a riveting pressure acquisition sensor 7-8-2 and a riveting point depth acquisition displacement sensor 7-8-5 respectively transmit the pressure and the displacement to a Kistler monitoring instrument in real time to generate a displacement-force curve function, and whether the curve meets the requirements of a standard judgment frame is judged.
The rotary servo tooth-identifying process, namely the Kistler press 7-6 is pressed down to a set position, because the external spline of the input shaft and the internal spline of the extension rod 10 are not aligned, the whole floating mechanism assembly 7-7 and the core shaft sleeve are separated from the inner hole step of the pressure head 7-6-1 by a certain distance, at the moment, the weight of the floating mechanism assembly 7-7 is totally acted on the input shaft instead of being hung on the inner hole step of the pressure head 7-6-1, the spline on the floating mechanism assembly 7-7 is identified to be in place, the sensor senses the output signal of the pressure head 7-6-1, then the extension rod angle servo assembly 7-7-1 is rotated at a set small angle at a slow speed, the internal spline and the external spline are aligned and identified under the action of the dead weight of the floating mechanism assembly 7-7, at the moment, the floating mechanism assembly 7-7 core shaft sleeve is contacted and hung on the inner hole step of the pressure head 7-6-1 again, the spline in-place sensor cannot sense the pressure head tooling and output signal, and the angle rotation servo records the current tooth-identifying angle, namely the installation angle.
The TOX riveting cylinder moving cylinder 7-8-7 is fixedly connected with the C-shaped frame 7-8-6, the right rivet 7-8-4 is fixed on the C-shaped frame 7-8-6, and the left rivet 7-8-3 is connected with a piston rod of the TOX riveting cylinder 7-8-1. The working process is as follows: the TOX riveting cylinder moving cylinder 7-8-7 stretches out to drive the C-shaped frame 7-8-6 and the TOX riveting cylinder 7-8-1 to integrally move leftwards, so that the right side rivet head 7-8-4 abuts against the extension rod 10, then a piston rod of the TOX riveting cylinder 7-8-1 drives the left side rivet head 7-8-3 to stretch out and abut against the extension rod 10 when the piston rod is in low pressure, and at the moment, the TOX riveting cylinder 7-8-1 starts up to boost to finish riveting points. The two riveting points are designed by adopting the C-shaped frames 7-8-6, so that synchronous pressure application and balanced stress of the riveting points at the two sides can be realized, excessive shearing and bending effects on the extension rod 10 in the riveting process are avoided, and the riveting point effect and the product quality are ensured. And the mode of line riveting is adopted as the selection of the riveting heads, so that the actual riveting point depth is consistent with the drawing requirement.
The special press-mounting machine equipment effectively solves the problem of automatic assembly of the product design, and the tooling design is flexible and matched with a multi-axis moving servo, so that the assembly requirements of products of different types are met; the positioning of the tool is accurate, the process control design logic is reasonable, and the assembly stability is ensured; meanwhile, the quality requirements of assembled products are guaranteed aiming at detection, monitoring and judgment of a plurality of key parameters.
Claims (10)
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