CN108188699A - Knuckle bushing is pressed push hole double-station machine tool control system - Google Patents

Abstract

The invention relates to the technical field of station machine tool control systems, and discloses a dual-station machine tool control system for press-fitting and pushing holes of steering knuckle bushes, which is characterized in that it includes a bed, a press-fitting station, a pushing-hole station, and a loading and unloading position ; The left side of the bed is a press-fit station, the middle is a loading and unloading position, and the right is a push-hole station; the press-fit station is vertically and symmetrically provided with two pressing bushing oil cylinders, and the front end of the pressing bushing oil cylinder A pressure head is provided; an ironing cylinder is vertically provided at the pushing station, and an ironing knife is provided at the front end of the ironing cylinder 3; a pressure-resistant guide rail is provided at a horizontal position passing through the pushing station and the pressing station, The pressure-resistant guide rail is provided with a mobile slide, which can move left and right through the expansion and contraction of the slide cylinder; the outside of the mobile slide is provided with a steering knuckle positioning plate, and a leveling cylinder is fixed on the slide. The invention can ensure the press-fitting quality of the bushing, has high production efficiency, can realize full-automatic control, saves manpower, and guarantees the production safety of workers.

Description

Steering knuckle bush press-fit push hole dual-station machine tool control system

technical field

The invention relates to the technical field of station machine tool control systems, and more specifically, relates to a dual-station machine tool control system for press-fitting steering knuckle bushings and pushing holes.

Background technique

In the assembly process of the steering knuckle assembly of the automobile front axle, two bushes need to be installed, and the inner holes of the two bushes should be pushed.

The installation of existing automobile front axle steering knuckle assembly bush generally adopts two kinds of methods: a kind of is manually knocked and installed, and another kind is mechanically press-fitted. There are artificial uncertain factors such as the size of the knocking force and the difficulty in controlling the uniformity of the manual knocking, the depth of the press is difficult to grasp, the quality of the press is poor, and the bushing is likely to be damaged in the early stage during the assembly process, resulting in early failure of the vehicle after assembly. Ineffective, the scrap rate of the workpiece is high; with mechanical press-fitting, only one bushing can be pressed at a time, the production efficiency is low, and a large amount of manual operation is required, which increases the production cost. After the bushing is installed, it needs to be processed by pushing the inner hole. The existing push hole of the bushing of the steering knuckle assembly of the automobile front axle is mostly processed by a horizontal punching machine. Since the horizontal punching machine occupies a large area, Therefore, it is not conducive to assembly line installation, and the ironing knife must be reinstalled every time the hole is pushed, resulting in increased labor intensity of workers, low production efficiency, affecting enterprise benefits, and it is difficult to meet the needs of mass production of automobiles.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the prior art, to provide a dual-station machine tool control system for press-fitting steering knuckle bushings and pushing holes, to press-fit steering knuckle bushes on the front axle of automobiles, replacing traditional manual work , and through the push hole of the pressing knife, the installation size of the steering knuckle bushing can be effectively controlled to ensure the press-fit quality of the bushing, solve the disadvantages of the traditional process, reduce the labor intensity of the workers, and meet the requirements for process accuracy. The machine tool can realize automatic control, save manpower and ensure the production safety of workers.

A dual-station machine tool control system for press-fitting and pushing holes of steering knuckle bushes, comprising a bed, a press-fitting station, a pushing-hole station, and a loading and unloading position. The left side of the bed is the pressing station, the middle is the loading and unloading position, and the right side is the pushing station. The press-fitting station is vertically and symmetrically equipped with two pressure bushing oil cylinders. The front end of the bushing oil cylinder is provided with a pressure head. The hole pushing station is vertically provided with an ironing oil cylinder, and an ironing knife is arranged at the front end of the ironing oil cylinder. A pressure-resistant guide rail is provided at the horizontal position passing through the pushing station and the press-fitting station, and a movable sliding table is arranged on the anti-pressure guiding rail. There is a steering knuckle positioning plate on the outside of the mobile slide table, and a leveling oil cylinder is fixed on the slide table. Proximity switches are respectively installed at the press-fitting station, loading and unloading station and hole-push station. Electromagnetic reversing valves are respectively provided on the supporting cylinder, slide table cylinder, bushing cylinder and ironing cylinder. A pressure sensor is arranged on the pressure head of the casing oil cylinder and the ironing oil cylinder, and the pressure sensor, the solenoid valve reversing valve and the proximity switch are respectively connected with the PLC.

Compared with the prior art, the present invention can ensure the press-fitting quality of the bushing, has high production efficiency, can realize full-automatic control, saves manpower, and guarantees the production safety of workers.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural representation of the machine tool of the present invention;

Fig. 2 is bed processing flowchart of the present invention;

Fig. 3 is the electrical diagram of the main circuit of the present invention;

Fig. 4 is the main program flowchart of the present invention;

In the figure: 1. Bed, 2. Press bushing cylinder, 3. Ironing cylinder, 4. Knife gripping mechanism, 5. Ironing knife, 6. Compression guide rail, 7. Moving slide table, 8. Slide table cylinder , 9. Fuping oil cylinder, 10. Steering knuckle positioning plate.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

The schematic diagram of the structure of the present invention is shown in Fig. 1 . The bed 1 of the machine tool is divided into a pressing station and a pushing station from left to right. The middle of the pushing station and the pressing station is the loading and unloading position, and the pressing station is vertically symmetrical with two pressing stations. Bushing oil cylinder 2, the front end of pressing bushing oil cylinder 2 is respectively provided with pressure head. An ironing oil cylinder 3 is vertically arranged at the hole pushing station, and an ironing knife 5 and a knife grabbing mechanism 4 are arranged at the front end of the ironing oil cylinder 3 . In the middle of the machine tool, a pressure-resistant guide rail 6 is provided horizontally through the hole-push station and the press-fitting station, and a mobile slide table 7 is arranged on the pressure-resistant guide rail 6. A steering knuckle positioning plate 10 is provided on the outside of the mobile slide table 7, and a leveling oil cylinder 9 is fixed on the mobile slide table 7. Proximity switches are respectively provided at the press-fitting station, loading and unloading station and hole-push station, and electromagnetic reversing valves are respectively provided on the leveling cylinder 9, slide table cylinder 8, bushing cylinder 2, and ironing cylinder 3 , pressure sensors are arranged on the pressure heads of the bushing cylinder 2 and the ironing cylinder 3, and the pressure sensors, solenoid valve reversing valves and proximity switches are respectively connected to the PLC.

The processing flow chart of the double-station machine tool is shown in Figure 2. In a processing flow, the workpiece is sent to different processing stations by the moving slide 7. The entire processing process only needs to be completed manually. , greatly saving manpower. The specific processing consists of the following steps:

(1) Place the workpiece: Put the two bushes on the pressure heads of the two bushing cylinders 2 respectively, fix the steering knuckle in the steering knuckle positioning plate 10 on the slide table, press the automatic start button, the machine tool protection The hood is closed.

(2) Steering knuckle arrives at the press-fitting station: PLC controls the sliding table oil cylinder 8 to advance and extend to push the sliding table to move to the left. signal, the sliding table decelerates and moves until it reaches the press-fitting station and stops.

(3) Auxiliary positioning of the steering knuckle: After the steering knuckle reaches the press-fitting station, the PLC controls the leveling cylinder 9 to advance and extend to fix the steering knuckle.

(4) Press-fit the bushing on the steering knuckle: After the steering knuckle is fixed, the PLC controls the bushing cylinder 2 to protrude upwards and downwards to press the bushing corresponding to the pressure head into the steering knuckle.

(5) Return of the hydraulic cylinder of the pressing station: After the two bushes are pressed in place, the corresponding pressure sensor sends out a signal, and the PLC controls the bushing cylinder 2 and the leveling cylinder 9 to return, the steering knuckle is released, and the corresponding The proximity switch sends out a signal, and the pressing process is completed.

(6) Steering knuckle arrives at the hole-push station: PLC controls the slide cylinder 8 to retreat and shrink to push the slide table to move to the right. When the slide table reaches the vicinity of the push-hole station, the right buffer proximity switch set at the push-hole station sends out a signal , the sliding table decelerates and moves until it reaches the hole pushing station and the sliding table stops.

(7) Carry out hole-pushing processing on the steering knuckle bushing: PLC controls the ironing cylinder 3 to go down. Knife 5 breaks away from the knife holder and falls vertically downward through the bushing, pushes the inner hole of the bushing, and finally falls into the cutter head, and the proximity switch next to the cutter head sends out a signal, and the hole pushing process is completed.

(8) Return of the pressing cylinder 3 at the hole pushing station: PLC controls the pressing cylinder 3 to rise and return until it is out of contact with the knife removal lever.

(9) Sliding table return: PLC controls the sliding table oil cylinder 8 to advance and extend to push the sliding table to move to the left. When the middle proximity switch sends out a signal, the sliding table stops moving and reaches the loading and unloading position (that is, the middle position of the machine tool).

(10) Push hole station connected to ironing knife 5: PLC controls ironing oil cylinder 3 to go down, put the knife holder at the front end of ironing oil cylinder 3 on ironing knife 5, and ironing oil cylinder 3 continues to descend until ironing knife 5 It is firmly plugged on the knife holder, and the corresponding pressure sensor sends out a signal. After that, the ironing cylinder 3 drives the ironing knife 5 upward, and the corresponding proximity switch sends out a signal, and returns to the initial state.

(11) Take out the steering knuckle: After all the processes are completed, the door of the protective cover is opened, and the processed steering knuckle is taken out. At this point, a processing flow is completed, and the processing of the next steering knuckle is started. Before processing, the system should be in the initial state, that is, the slide table is located at the loading and unloading position, the proximity switch at the loading and unloading position sends out a signal, the bushing cylinder 2 and the ironing cylinder 3 are both in the initial state, and the corresponding proximity switch sends out a signal to support Flat oil cylinder 9 does not stretch out. At this time, the system is allowed to run. If there is an unexpected situation or the emergency stop button is pressed externally, the system is not in the initial state, and the machine tool will not be able to perform automatic processing. At this time, it is necessary to adjust the machine tool to the manual state, and adjust all parts of the machine tool to the initial state before automatic processing. At the same time, the design of each mechanism of this machine tool utilizes the vertical downward characteristic of gravity, so the bed 1 cannot be placed tilted, otherwise it will cause the processing mechanism to shift downward, and the bushing cannot be accurately pressed into the steering knuckle and the ironing knife. 5. It is impossible to lose the knuckle bushing and the cutter head, and it may even damage the machine tool and the ironing knife. 5.

The electrical diagram of the main circuit is shown in Figure 3. The hydraulic motor is powered by three-phase power, and the switching power supply outputs 24 V DC to power the control circuit. Multiple circuit breakers are designed in the circuit as power supply control switches.

The main program flow chart of the system software is shown in Figure 4. The system will automatically alarm when the emergency stop button is pressed or the hydraulic motor is overloaded. When there is no alarm, press the system start button to start the hydraulic system, and press the system stop button to shut down the hydraulic system.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, the patent owner can make various deformations or modifications within the scope of the appended claims, as long as they do not exceed the scope of protection described in the claims of the present invention, all should Within the protection scope of the present invention.

Claims (1)

1. a kind of knuckle bushing is pressed push hole double-station machine tool control system, it is characterised in that：Including lathe bed, press fitting station, Push hole station and upper and lower discharge position；The lathe bed left side is press fitting station, and centre is upper and lower discharge position, and the right is push hole station； Vertical symmetry is equipped with upper and lower 2 pressure bushing oil cylinders on the press fitting station, which is equipped with pressure head；The push hole Working-position vertical is equipped with pressing oil cylinder, which is equipped with pressing knife；Across the horizontal position for pushing station and press fitting station Resistance to compression guide rail is installed, which is equipped with Mobile Slide, the flexible realization which passes through sliding table oil cylinder or so It is mobile；Knuckle positioning plate is equipped on the outside of the Mobile Slide, 1 is fixed on slide unit and helps flat oil cylinder；Press fitting station, on It is respectively equipped at lower discharge position and push hole station close to switch, is helping flat oil cylinder, sliding table oil cylinder, pressure bushing oil cylinder, pressing oil cylinder On be respectively equipped with solenoid directional control valve, pressure bushing oil cylinder and pressing oil cylinder pressure head on be equipped with pressure sensor, pressure sensor, electricity Magnet valve reversal valve is connect close to switch with PLC respectively.