A hood positioning device and positioning method for a vehicle

Abstract

The application discloses a car front cover positioning device and a positioning method. The car front cover positioning device comprises a support, a plurality of rack tracks are arranged on the support, a positioning mechanism is arranged on the rack tracks, the positioning mechanism comprises a plurality of positioning columns and a pushing assembly, one end of the positioning column is connected with the pushing assembly, the other end is used for abutting with a workpiece, and the pushing assembly is used for pushing the positioning column to reciprocate in the vertical direction; a clamping mechanism is arranged on the rack tracks, the clamping mechanism comprises a plurality of clamping columns and a driving assembly, the output end of the driving assembly is engaged with the tooth surface of the rack track, and the driving assembly is used for driving the clamping column or the positioning column to reciprocate in the horizontal direction; a control mechanism is electrically connected with the positioning mechanism and the clamping mechanism, and is used for controlling the operation of the positioning mechanism and the clamping mechanism. The positioning column and the clamping column are moved in multiple directions, the adaptability to different car front covers is improved, and the problem of insufficient adaptability of the positioning device to products in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic assembly, in particular to a front cover positioning device and positioning method for automobile. BACKGROUND

[0002] In the field of automobile manufacturing, the existing front cover positioning of automobiles usually adopts mechanical clamps or simple positioning devices to complete the fixation of workpieces. However, due to the great differences in shape, size and material of automobile front covers between different vehicle models, the positioning equipment of the existing technology often shows the problem of low adaptability to products when adapting to different types of front covers.

[0003] In the existing technology, some positioning equipment realizes the fixation of front covers through simple mechanical clamping devices or frequently adjusted positioning points. Although these devices can meet the basic positioning needs to some extent, they have poor universality and are difficult to adapt to the shape and size changes of front covers of various vehicle models. For example, when producing different vehicle models, the equipment may need to redesign the clamps or adjust the positions of the positioning points, which not only increases the complexity of operation, but also may cause the positioning accuracy to decrease due to improper adjustment, limiting the improvement of production efficiency. This technical problem of low adaptability to products makes the existing equipment gradually difficult to meet the needs of flexible and intelligent production in modern automobile manufacturing.

[0004] Therefore, there is an urgent need for a positioning device that can effectively improve the adaptability to front covers of different vehicle models to improve production efficiency, reduce costs and meet the flexible needs of modern automobile manufacturing. SUMMARY

[0005] The purpose of the present application is to provide a front cover positioning device and positioning method for automobile, which solves the technical problem that the existing technology cannot effectively position and clamp front covers of different vehicle models.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] A front cover positioning device for automobile, comprising:

[0008] a support, a plurality of rack tracks are provided on the support;

[0009] a positioning mechanism provided on the rack track, the positioning mechanism comprising a plurality of positioning columns and a pushing assembly, one end of the positioning column being connected with the pushing assembly, the other end being used for abutting with a workpiece, the pushing assembly being used for pushing the positioning column to reciprocate in the vertical direction;

[0010] a clamping mechanism provided on the rack track, the clamping mechanism comprising a plurality of clamping columns and a driving assembly, the output end of the driving assembly being engaged with the tooth surface of the rack track, used for driving the clamping column or the positioning column to reciprocate in the horizontal direction;

[0011] A control mechanism electrically connected with the positioning mechanism and the clamping mechanism, used for controlling the operation of the positioning mechanism and the clamping mechanism.

[0012] Further, the positioning column comprises a column body, a guide sleeve and a flexible contact head, the guide sleeve is sleeved on one end of the column body and the output end of the pushing assembly, and the flexible contact head is arranged on the other end of the column body.

[0013] Further, the positioning column further comprises an elastic buffer, a helical spring of the elastic buffer is provided with a pre-compression structure, and the helical spring is embedded in a connecting cavity between the column body and the flexible contact head, and is used for absorbing the impact force during pushing.

[0014] Further, the rack rail comprises a first support plate, a first rail and a second rail, the first rail is arranged on the first side of the support, the first support plate is slidably connected with the first rail through a sliding block, the second rail is arranged on the first support plate, and the first rail and the second rail are relatively perpendicular.

[0015] The driving assembly comprises a first driving member and a second driving member, the first driving member is used for driving the positioning column and the clamping column to reciprocate in the first horizontal direction on the first rail, the second driving member is used for driving the clamping column to reciprocate in the second horizontal direction on the second rail, and the positioning column is arranged on the first support plate and away from one end of the first rail.

[0016] Further, the rack rail further comprises a second support plate, a third rail and a fourth rail, the third rail is arranged on the second side of the support, the second support plate is slidably connected with the third rail through a sliding block, a first sliding seat is fixedly arranged on the second support plate, the fourth rail is slidably matched with a groove on the sliding seat, the fourth rail is arranged on the second support plate, and the third rail and the fourth rail are relatively perpendicular.

[0017] The driving assembly further comprises a third driving member and a fourth driving member, the third driving member is used for driving the clamping column to reciprocate in the second horizontal direction on the third rail, and the fourth driving member is used for driving the fourth rail to reciprocate in the first horizontal direction, so as to drive the clamping column to reciprocate in the first horizontal direction.

[0018] Further, the rack rail further comprises a third support plate and a fifth rail, the third support plate is slidably connected with the third rail through a sliding block, a second sliding seat is fixedly arranged on the third support plate, the fifth rail is slidably matched with a groove on the second sliding seat, and one end of the fifth rail is connected with the positioning column.

[0019] The driving assembly further comprises a fifth driving member for driving the fifth track to move back and forth along a first horizontal direction, so as to drive the positioning column to move back and forth along the first horizontal direction.

[0020] Further, the second support plate and the third support plate are each provided with a plurality of position sensors, and the fourth track and the fifth track are each provided with an induction sheet corresponding to the position sensors.

[0021] Further, a display screen and a control mechanism are electrically connected, and the display screen is used to display the running state and position information of the positioning mechanism and the clamping mechanism in real time, and a man-machine interface is further provided.

[0022] The application further provides an automobile front cover positioning method for controlling the automobile front cover positioning device, comprising the following steps:

[0023] The control mechanism is started to control the pushing assembly to drive the plurality of positioning columns to move upward along a vertical direction to a preset initial height, and the initial height is greater than the maximum thickness of the automobile front cover workpiece;

[0024] The automobile front cover workpiece is placed on the top end of the positioning column, the control mechanism generates a control signal according to the position information fed back by the sensor and transmits the control signal to the pushing assembly, the pushing assembly adjusts the displacement of each positioning column along the vertical direction according to the control signal, so that the bottom surface of the automobile front cover workpiece remains horizontal;

[0025] The control mechanism generates a clamping control signal according to the preset clamping parameters and transmits the clamping control signal to the driving assembly, and the driving assembly drives the clamping column to move along the horizontal direction according to the clamping control signal until the clamping column abuts against the side edge of the automobile front cover workpiece, thereby completing the clamping operation of the automobile front cover workpiece.

[0026] Further, the step of generating a clamping control signal by the control mechanism according to the preset clamping parameters and transmitting the clamping control signal to the driving assembly comprises:

[0027] The preset clamping parameters corresponding to the automobile front cover workpiece are obtained, and the preset clamping parameters include the clamping force and the moving speed of the clamping column;

[0028] The real-time position and contact state data of the side edge of the automobile front cover workpiece are collected by the displacement sensor and the pressure sensor of the clamping mechanism, and workpiece state data are generated;

[0029] The signal processing unit of the control mechanism compares the workpiece state data with the preset clamping parameters, calculates the deviation of the position of the workpiece side edge from the preset target position and the deviation of the contact pressure, and generates a parameter deviation value;

[0030] The signal processing unit of the control mechanism generates a clamping control signal according to the parameter deviation value, the clamping control signal is used to correct the moving speed of the clamping column and / or the clamping force, and drives the clamping column to move horizontally along the rack rail until the clamping column abuts against the side edge of the automobile front cover workpiece, and the clamping operation is completed.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] The present application realizes precise positioning and fixing of the automobile front cover through the cooperation of the plurality of rack rails provided on the support, the positioning mechanism and the clamping mechanism. The positioning column in the positioning mechanism is driven by the pushing assembly and can be flexibly adjusted in the vertical direction, so as to adapt to front cover workpieces of different sizes and shapes, and the horizontality and stability of the workpiece in the positioning process are ensured. The clamping column in the clamping mechanism is engaged with the tooth surface of the rack rail through the driving assembly, and can be accurately moved in the horizontal direction, so as to quickly clamp the workpiece and prevent the workpiece from deviating during machining or assembly. The control mechanism realizes precise control of the positioning mechanism and the clamping mechanism through electrical connection, so that the positioning and clamping process is highly automated, the operation is simple and the efficiency is significantly improved. The equipment can quickly adapt to the shape and size changes of front covers of various vehicle models without changing the clamp or frequent adjustment, thereby greatly improving the flexibility level of the production line. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0034] The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and are not used to limit the conditions that can be implemented by the present application. Therefore, any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0035] Figure 1 The overall structure schematic diagram of the automobile front cover positioning device;

[0036] Figure 2 The overall structure schematic diagram of the automobile front cover positioning device from another perspective;

[0037] Figure 3 The overall structure schematic diagram of the automobile front cover positioning device from another perspective; Figure 2 The enlarged view of A in the overall structure schematic diagram of the automobile front cover positioning device;

[0038] Figure 4 For Figure 2 enlarged view at B in

[0039] Figure 5 For the first support plate of the automobile front cover positioning device Embodiment of structure schematic view;

[0040] Figure 6 For the third support plate of the automobile front cover positioning device Embodiment of structure schematic view;

[0041] Figure 7 Automobile front cover positioning method overall step schematic view.

[0042] Illustration:

[0043] 1, bracket; 11, first side; 12, second side; 2, rack rail; 21, first support plate; 22, first track; 23, second track; 24, second support plate; 25, third track; 26, fourth track; 27, third support plate; 28, fifth track; 3, positioning mechanism; 31, positioning column; 311, column body; 312, guide sleeve; 313, flexible contact head; 32, push assembly; 4, clamping mechanism; 41, clamping column; 42, drive assembly; 421, first drive piece; 422, second drive piece; 423, third drive piece; 424, fourth drive piece; 425, fifth drive piece; 5, control mechanism; 6, slider; 61, first sliding seat; 62, second sliding seat; 71, position sensor; 72, inductive sheet; 8, display screen. DETAILED DESCRIPTION

[0044] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0046] The technical solutions of the present application are further illustrated below in conjunction with the accompanying drawings and specific embodiments.

[0047] With reference to Figures 1 to 6 The present application provides an automobile front cover positioning device, comprising: a bracket 1, a plurality of rack tracks 2 are arranged on the bracket 1; a positioning mechanism 3 is arranged on the rack track 2, the positioning mechanism 3 comprises a plurality of positioning columns 31 and a pushing assembly 32, one end of the positioning column 31 is connected with the pushing assembly 32, and the other end is used for abutting with a workpiece, and the pushing assembly 32 is used for pushing the positioning column 31 to reciprocate in the vertical direction; a clamping mechanism 4 is arranged on the rack track 2, the clamping mechanism 4 comprises a plurality of clamping columns 41 and a driving assembly 42, an output end of the driving assembly 42 is engaged with a tooth surface of the rack track 2, and the driving assembly 42 is used for driving the clamping column 41 or the positioning column 31 to reciprocate in the horizontal direction; a control mechanism 5 is electrically connected with the positioning mechanism 3 and the clamping mechanism 4, and is used for controlling the operation of the positioning mechanism 3 and the clamping mechanism 4.

[0048] In this embodiment, the support 1 is provided with multiple rack rails 2, which are linear guides with toothed structures, capable of cooperating with the gears or other meshing mechanisms of the driving assembly 42 to achieve linear motion. The number and layout of the rack rails 2 can be optimized according to actual production needs, for example, they can be arranged in different directions or planes of the support 1 to accommodate front cover workpieces of different sizes and shapes, thereby improving the versatility and adaptability of the equipment. The positioning mechanism 3 is arranged on the rack rails 2 and includes multiple positioning columns 31 and a pushing assembly 32. The positioning columns 31 are components that directly contact the workpiece and serve to provide stable support and positioning reference through the contact points with the surface of the front cover. By controlling the operation of the pushing assembly 32, the positioning columns 31 can move up and down in the vertical direction (i.e., the Y-axis), thereby adjusting the height of the contact points with the workpiece. This vertical reciprocating movement function enables the equipment to adapt to front cover workpieces of different heights or thicknesses. For example, when producing different vehicle models, the curved shape or height of the front cover may differ. The positioning columns 31 can be flexibly adjusted to the appropriate height according to the actual dimensions of the workpiece through the driving of the pushing assembly 32, to ensure that the workpiece remains level and stable during positioning. When the equipment is started, the driving assembly 42 is controlled to drive the positioning columns 31 to extend outward in the horizontal direction, i.e., towards the support 1, to expand the positioning space range beyond the product size. After placing the product on the positioning columns 31, the position of the positioning columns 31 can be adjusted by further controlling the movement of the pushing assembly 32, to keep the workpiece in a horizontal state. The clamping mechanism 4 is arranged on the rack rails 2 and includes multiple clamping columns 41 and a driving assembly 42. The main function of the clamping columns 41 is to fix the workpiece in the positioning position by applying clamping force, to prevent it from shifting or shaking during processing or assembly. The driving assembly 42 can convert the rotational motion of the motor into horizontal linear motion of the clamping columns 41 or positioning columns 31 by meshing with the toothed surface of the rack rails 2, thereby achieving rapid and reliable clamping of the workpiece. After the positioning columns 31 complete positioning, the driving assembly 42 is controlled to make the clamping columns 41 clamp the product to keep it stationary, providing a stable workpiece state for the next process. The control mechanism 5 is electrically connected to the positioning mechanism 3 and the clamping mechanism 4 and is used to control their operation. It can control the vertical movement of the positioning columns 31 and the horizontal movement of the clamping columns 41 through pre-set programs or real-time instructions, to make the entire positioning and clamping process complete according to the established process flow. The control mechanism 5 may include microprocessors, sensors, actuators, etc. By collecting information such as workpiece position and size, it can adjust the motion parameters of the positioning columns 31 and clamping columns 41 in real time, to achieve rapid adaptation and precise fixation of front covers of different vehicle models.

[0049] It is worth noting that the clamping columns 41, the positioning columns 31 and the corresponding driving members in the above embodiments all include multiple groups, and each group of clamping columns 41, positioning columns 31 and corresponding driving members can work independently, and can perform differentiated positioning and clamping operations according to the characteristics and needs of different parts of the automobile front cover. For example, for the parts of the front cover edge which are relatively weak, the clamping column 41 with smaller force can be used for fixation to avoid damage to the workpiece due to excessive clamping force; for the relatively thick parts of the front cover, the clamping column 41 with larger force can be used so that the workpiece will not displace during the machining process. At the same time, multiple positioning columns 31 can be used to position different key points of the front cover to improve the accuracy of positioning.

[0050] Further, the present embodiment is used for fixing and positioning the automobile front cover, and subsequent machining or detection operations will be performed in actual application. Corresponding machining equipment and detection equipment can be used in conjunction with the automobile front cover positioning equipment. For example, after the positioning and clamping of the front cover are completed, the automatic welding equipment can be directly connected to perform welding operation on the spliced part of the front cover, and the workpiece will not displace during the welding process, thereby ensuring the welding quality and improving the welding efficiency. Or connected with detection equipment such as laser detector to detect the flatness and size of the front cover, and the detection equipment can quickly and accurately obtain relevant detection data according to the reference position determined by the positioning equipment.

[0051] In one embodiment, the positioning column 31 includes a column body 311, a guide sleeve 312 and a flexible contact head 313, the guide sleeve 312 is sleeved on one end of the column body 311 and the output end of the pushing assembly 32, and the flexible contact head 313 is arranged on the other end of the column body 311.

[0052] In this embodiment, the positioning column 31 is composed of three parts: the column body 311, the guide sleeve 312, and the flexible contact head 313. The column body 311 is the main part of the positioning column 31, serving as a connection and force transmission. It can be made of metal or other high-strength materials to ensure long-term stable operation in high-frequency and high-load industrial environments. The guide sleeve 312 is fitted on one end of the column body 311 and the output end of the pushing assembly 32. By being fitted on the column body 311, it ensures the correct directionality and stability of the column body 311 during movement, preventing deviation caused by external forces or vibrations. It is also connected to the output end of the pushing assembly 32, serving as a power transmission. The guide sleeve 312 can contain sliding bearings or ball bearings to reduce friction and improve smoothness of movement. The flexible contact head 313 is another key component of the positioning column 31, located at the other end of the column body 311. It is used to directly contact the workpiece (the automobile front cover), providing a certain buffer and adaptability when contacting the workpiece, avoiding damage to the workpiece surface caused by rigid contact. The material of the flexible contact head 313 can include rubber, silicone, or other elastic materials, which can produce slight deformation when in contact, absorbing impact force while maintaining stable contact with the workpiece. For example, the contact surface of the flexible contact head 313 is provided with an arc-shaped rubber pad, which is fixedly connected to the top end of the column body 311, used to adapt to the surface shape of the workpiece, reducing the risk of workpiece damage.

[0053] In an embodiment, the positioning column 31 also includes an elastic buffer. The spiral spring of the elastic buffer is provided with a pre-compression structure, which is embedded in the connecting cavity between the column body 311 and the flexible contact head 313, used to absorb the impact force during pushing.

[0054] In this embodiment, the elastic buffer is composed of a spiral spring with a pre-compression structure, which is embedded in the connecting cavity between the column body 311 and the flexible contact head 313, absorbing the impact force generated during the pushing process of the positioning column 31. The pre-compression structure allows the spiral spring to be in a certain compressed state in the initial state, enabling the spring to respond quickly when subjected to external force and providing a buffer force. The spiral spring is located in the internal structure of the positioning column 31, and the connecting cavity can accommodate the spiral spring and ensure its normal deformation and recovery when subjected to force. Through the limiting action of the connecting cavity, it ensures that the spiral spring does not deviate or fail during movement. During the positioning process of the automobile front cover, the positioning column 31 needs to move back and forth in the vertical direction to abut against the workpiece. The weight, shape of the workpiece, and dynamic contact during the positioning process may cause a large impact force. By setting the elastic buffer and utilizing the elastic deformation characteristics of the spiral spring, the impact force is converted into the compression or stretching energy of the spring, effectively absorbing and dispersing the impact force, protecting the workpiece and the positioning equipment.

[0055] In another embodiment, the pre-compression structure comprises a pressure sensor, the signal output port of the pressure sensor faces the bottom of the flexible contact head 313, the pressure sensor is embedded in the bottom surface of the flexible contact head 313 and is in indirect contact with the bottom end of the coil spring, and the pressure sensor generates real-time pressure data by detecting the impact force when the workpiece contacts the flexible contact head 313. The pressure sensor is connected to the external microprocessor module through a signal line to transmit the collected pressure data to the control system for dynamic calculation and adjustment of the pre-compression amount of the coil spring to ensure that the impact force is within a safe range.

[0056] In an embodiment, the rack rail 2 comprises a first support plate 21, a first rail 22 and a second rail 23, the first rail 22 is arranged on the first side 11 of the support frame 1, the first support plate 21 is slidably connected to the first rail 22 through the sliding block 6, and the second rail 23 is arranged on the first support plate 21, and the first rail 22 and the second rail 23 are relatively perpendicular.

[0057] The driving assembly 42 comprises a first driving member 421 and a second driving member 422, the first driving member 421 is used to drive the positioning column 31 and the clamping column 41 to reciprocate along a first horizontal direction on the first rail 22, and the second driving member 422 is used to drive the clamping column 41 to reciprocate along a second horizontal direction on the second rail 23, and the positioning column 31 is arranged on the first support plate 21 away from one end of the first rail 22.

[0058] In the embodiment, the rack rail 2 comprises a first support plate 21, a first rail 22 and a second rail 23, the first rail 22 is arranged on the first side 11 of the support frame 1, the second rail 23 is arranged on the first support plate 21 and is perpendicular to the first rail 22, so that the clamping column 41 can be independently controlled in two perpendicular horizontal directions (i.e. the first horizontal direction and the second horizontal direction), and the driving assembly 42 comprises a first driving member 421 and a second driving member 422, which are respectively responsible for driving the positioning column 31 and the clamping column 41 to move in different directions. The first driving member 421 is used to drive the positioning column 31 and the clamping column 41 to reciprocate along the first horizontal direction on the first rail 22, and the output end of the first driving member 421 transmits power to the first support plate 21 by meshing with the tooth surface of the rack rail 2, so as to drive the positioning column 31 and the clamping column 41 to move synchronously. The second driving member 422 is used to drive the clamping column 41 to reciprocate along the second horizontal direction on the second rail 23, and the movement of the clamping column 41 in the second horizontal direction is independent of the positioning column 31. Such independent driving can realize the positioning of the clamping column 41 when clamping the workpiece, without interfering with the movement trajectory of the positioning column 31. The positioning column 31 is fixedly arranged on the first support plate 21 away from one end of the first rail 22, so as to avoid interference with other moving parts.

[0059] It is worth noting that the first side 11 described in the above embodiments can be any side of the bracket 1, and the bracket 1 can be symmetrically structured or asymmetrically structured. When the first side 11 is selected as a certain side of the bracket 1, the arrangement can be made according to the actual production space, operation convenience and other factors, and the clamping column 41 and the positioning column 31 on the third support plate 27 in the above embodiments are only one example of the layout. In actual application, the distribution position and the number of the clamping column 41 and the positioning column 31 on the bracket 1 can be adjusted according to the specific shape, size and processing process requirements of the automobile front cover. The first horizontal direction and the second horizontal direction are two mutually perpendicular directions along the X axis. When the front cover with a complex curved surface or a special shape is processed, the position of the clamping column 41 and the positioning column 31 on the first track 22 and the second track 23 can be adjusted, and the double-track and double-drive can be used to realize the multidimensional movement of the clamping column 41 and the positioning column 31 in the plane.

[0060] In an embodiment, the rack track 2 further comprises a second support plate 24, a third track 25 and a fourth track 26, the third track 25 is arranged on the second side 12 of the bracket 1, the second support plate 24 is slidably connected with the third track 25 through the sliding block 6, the first sliding seat 61 is fixedly arranged on the second support plate 24, the fourth track 26 is slidably matched with the groove on the sliding seat, the fourth track 26 is arranged on the second support plate 24, and the third track 25 and the fourth track 26 are relatively perpendicular.

[0061] The driving assembly 42 further comprises a third driving member 423 and a fourth driving member 424, the third driving member 423 is used to drive the clamping column 41 to reciprocally move along the second horizontal direction on the third track 25, and the fourth driving member 424 is used to drive the fourth track 26 to reciprocally move along the first horizontal direction, so as to drive the clamping column 41 to reciprocally move along the first horizontal direction.

[0062] In the embodiment, the rack track 2 further comprises a second support plate 24, a third track 25 and a fourth track 26, and a first sliding seat 61 and a driving mechanism of a third driving member 423 and a fourth driving member 424, through the coordinated action of the multi-level track system and the driving assembly 42, the clamping column 41 can realize independent reciprocating movement in the first horizontal direction and the second horizontal direction on the second side 12, thereby providing higher freedom for the positioning and clamping of the automobile front cover. Specifically, the third track 25 is arranged on the second side 12 of the bracket 1, the second support plate 24 is slidably connected with the third track 25 through the sliding block 6, the first sliding seat 61 is fixedly arranged on the second support plate 24, and the fourth track 26 is slidably matched with the groove on the first sliding seat 61. The fourth track 26 is also arranged on the second support plate 24, and the third track 25 and the fourth track 26 are in a perpendicular relationship. This multi-level track design significantly enhances the movement ability of the equipment in space, so that the clamping column 41 can not only move in the second horizontal direction along the third track 25, but also realize movement in the first horizontal direction through the sliding cooperation of the fourth track 26. The driving assembly 42 comprises a third driving member 423 and a fourth driving member 424, the third driving member 423 is responsible for driving the clamping column 41 to reciprocate in the second horizontal direction on the third track 25, and the fourth driving member 424 drives the fourth track 26 to move in the first horizontal direction, thereby indirectly driving the clamping column 41 to reciprocate in the first horizontal direction. The advantage of this driving mode is that by distributing the driving function to different driving members, the equipment can realize higher precision motion control.

[0063] It is worth noting that the second side 12 can be adjacent to one side or both sides of the first side 11, that is, the second side 12 can be a plurality of sides adjacent to the first side 11 on the bracket 1, and the layout on the plurality of sides adjacent to the first side 11 is consistent. In actual application, this multi-sided layout design can better adapt to automobile front covers of different shapes and sizes. For example, when processing front covers with complex curved surfaces or irregular shapes, the positions of the clamping column 41 and the positioning column 31 can be flexibly adjusted on the tracks on different sides to realize omnidirectional positioning and clamping of the workpiece. The tracks on the second side 12 are connected with a single clamping column 41, and a plurality of second support plates 24, corresponding tracks and driving members can be arranged to realize independent layout of a plurality of clamping columns 41 on the second side 12, thereby meeting the positioning and clamping requirements of complex workpieces.

[0064] In an embodiment, the rack track 2 further comprises a third support plate 27 and a fifth track 28, the third support plate 27 is connected with the third track 25 through the sliding block 6, a second sliding seat 62 is fixedly arranged on the third support plate 27, the fifth track 28 is in sliding fit with the groove on the second sliding seat 62, and one end of the fifth track 28 is connected with the positioning column 31; the driving assembly 42 further comprises a fifth driving member 425, the fifth driving member 425 is used to drive the fifth track 28 to move back and forth along the first horizontal direction, so as to drive the positioning column 31 to move back and forth along the first horizontal direction.

[0065] In the embodiment, the rack track 2 further comprises a third support plate 27, a fifth track 28 and a fifth driving member 425, the third support plate 27 is connected with the third track 25 through the sliding block 6, and the third support plate 27 can move along the direction of the third track 25 (i.e. the second horizontal direction). A second sliding seat 62 is fixedly arranged on the third support plate 27, the fifth track 28 is in sliding fit with the groove on the second sliding seat 62, and one end of the fifth track 28 is connected with the positioning column 31. The fifth driving member 425 is used to drive the fifth track 28 to move back and forth along the first horizontal direction, so as to drive the positioning column 31 to realize accurate reciprocating movement in the first horizontal direction. Through the cooperation of the fifth track 28 and the fifth driving member 425, an additional movement degree of freedom is provided for the positioning column 31 on the second side 12 of the bracket 1, so that the positioning column 31 can move in the vertical direction and realize positioning in the first horizontal direction. In actual application, the positioning column 31 is first moved to a specified position in the first horizontal direction, and is aligned with the edge of the automobile hood or a specific positioning point, and then the pushing assembly 32 is used to abut against the workpiece in the vertical direction to complete positioning. The clamping column 41 clamps the workpiece in the horizontal direction through the movement of the third track 25 and the fourth track 26, so as to ensure that the workpiece is stable during machining or assembly. The design of cooperation between the positioning column 31 and the clamping column 41 can effectively improve the efficiency of positioning and clamping, and reduce the complexity of operation of the equipment.

[0066] It is worth noting that the movement of the positioning column 31 and the clamping column 41 on the first side 11 and the second side 12 of the bracket 1 is independent and coordinated. On the first side 11 of the bracket 1, the positioning column 31 and the clamping column 41 can move along the first horizontal direction on the first track 22 by means of the first driving member 421, and at the same time the clamping column 41 can move along the second horizontal direction on the second track 23 by means of the second driving member 422, realizing preliminary positioning and clamping adjustment. On the second side 12 of the bracket 1, the third support plate 27 can move along the second horizontal direction on the third track 25, and the fifth track 28 can move along the first horizontal direction by means of the fifth driving member 425 under the cooperation of the second sliding seat 62, thereby driving the positioning column 31 to move. The third driving member 423 can drive the clamping column 41 to move along the second horizontal direction on the third track 25, and the fourth driving member 424 can drive the fourth track 26 to move along the first horizontal direction, thereby indirectly driving the clamping column 41 to move in this direction. Such design enables the positioning column 31 and the clamping column 41 to independently and accurately move in multiple directions according to the shape and size characteristics of different parts of the automobile hood. For example, for an automobile hood with irregular shape and complex curved surface, the positioning column 31 can first move to the appropriate position in the first horizontal direction and align with the key positioning point of the hood, and then abut in the vertical direction; the clamping column 41 can be flexibly adjusted in two horizontal directions according to the edge position of the hood, realizing omnidirectional positioning and clamping, ensuring the stability of the automobile hood position in the subsequent processing or detection process, and improving the quality and efficiency of the entire production process.

[0067] In an embodiment, the side edges of the second support plate 24 and the third support plate 27 are each provided with a plurality of position sensors 71, and the fourth track 26 and the fifth track 28 are respectively provided with sensing sheets 72 corresponding to the position sensors 71. The display screen 8 is electrically connected with the control mechanism 5, and the display screen 8 is used to display the running state and position information of the positioning mechanism 3 and the clamping mechanism 4 in real time, and a man-machine interaction interface.

[0068] In this embodiment, the side edges of the second support plate 24 and the third support plate 27 are each provided with a plurality of position sensors 71, which are devices capable of detecting the position of an object and sensing the position change of the target object through optical, electromagnetic, or mechanical means. The fourth rail 26 is provided with sensing strips 72 corresponding to the position sensors 71 on the second support plate 24, and the fifth rail 28 is provided with sensing strips 72 corresponding to the position sensors 71 on the third support plate 27, which serve as the detection targets of the sensors. The sensing strips 72 are components with specific physical properties, such as metal strips or magnetic materials, which can be recognized by the sensors and trigger signal output. Through this design, the specific positions of the fourth rail 26 and the fifth rail 28 can be monitored in real time, thereby indirectly obtaining the movement state of the clamping column 41 and the positioning column 31 in the horizontal direction. The position sensors 71 transmit data to the control mechanism 5 by detecting the position information of the sensing strips 72, and the control mechanism 5 adjusts the output of the driving assembly 42 based on these data, such as controlling the running speed and direction of the third driving member 423, the fourth driving member 424, or the fifth driving member 425, thereby achieving precise control of the clamping column 41 and the positioning column 31, and improving the intelligent level of the equipment, enabling the equipment to adaptively adjust the positioning and clamping actions in complex working environments. For example, during the positioning process of the automobile front cover, the position sensors 71 can detect whether the front cover has reached the predetermined position, and if not, the control mechanism 5 can adjust the movement trajectory of the clamping column 41 or the positioning column 31 through the driving assembly 42 until the ideal positioning state is reached.

[0069] The display screen 8 is used to display the running state and position information of the positioning mechanism 3 and the clamping mechanism 4 in real time, and provides a human-machine interaction interface. The operator can understand the running state of the equipment in real time through the intuitive visual interface, such as the current position, movement speed of the positioning column 31 and the clamping column 41, and whether the preset positioning target is reached, and the position data detected by the sensor can be directly presented to enable the operator to quickly judge whether the working state of the equipment is normal. The operator can input instructions through the human-machine interaction interface, such as setting the moving distance of the positioning column 31 or the clamping column 41, adjusting the movement speed, or switching the working mode. The display screen 8 can adopt a liquid crystal display screen 8 (LCD), a touch screen, or other visualization technologies, and its electrical connection with the control mechanism 5 is usually realized through data lines or wireless communication modules. The control mechanism 5 is responsible for processing data from the position sensors 71 and sending the processed information to the display screen 8 for presentation. The interaction interface on the display screen 8 can include graphical buttons, parameter input boxes, or status indicator lights, etc., to facilitate intuitive operation by the operator. For example, the operator can input the clamping force parameter of the clamping column 41 through the touch screen, or check whether the positioning column 31 correctly abuts against the workpiece through the interface.

[0070] Referring to Figure 7The application also provides a hood positioning method applied to the hood positioning device, and comprising the following steps:

[0071] S1: starting the control mechanism to control the pushing assembly to drive the plurality of positioning columns to move upward along the vertical direction to a preset initial height according to the control mechanism, the initial height being greater than the maximum thickness of the hood workpiece;

[0072] S2: placing the hood workpiece on the top end of the positioning column, the control mechanism generating a control signal according to the position information fed back by the sensor and transmitting the control signal to the pushing assembly, the pushing assembly adjusting the displacement of each positioning column along the vertical direction according to the control signal to keep the bottom surface of the hood workpiece horizontal;

[0073] S3: the control mechanism generating a clamping control signal according to the preset clamping parameter and transmitting the clamping control signal to the driving assembly, the driving assembly driving the clamping column to move along the horizontal direction according to the clamping control signal until the clamping column abuts against the side edge of the hood workpiece, and completing the clamping operation on the hood workpiece.

[0074] In steps S1-S3, the control mechanism determines the initial height value based on the design specifications and thickness range of the automobile front cover workpiece through a preset program or operator input parameters, generates a corresponding control signal, and transmits it to the pushing assembly, which can be a motor, a pneumatic cylinder, or a hydraulic device, etc. According to the signal, the positioning column is driven to move along the rack rail in the vertical direction until the preset height is reached. The automobile front cover workpiece is placed on the top of the positioning column, and the flexible contact head of the positioning column is in contact with the bottom surface of the workpiece at this time. The flexible material can adapt to the shape of the workpiece surface, reducing local stress concentration. The control mechanism receives data feedback from the sensor, such as the inclination angle of the workpiece bottom surface relative to the horizontal plane or the relative height difference of each positioning column, and calculates the required displacement adjustment amount through the signal processing unit. For example, if the sensor detects that one side of the workpiece is lower, the control mechanism will generate a signal instructing the pushing assembly to drive the corresponding side of the positioning column to further adjust upwards or downwards until the workpiece bottom surface reaches a horizontal state. The control mechanism generates a clamping control signal according to the preset clamping parameters and transmits it to the driving assembly, which drives the clamping column to move in the horizontal direction until it is in contact with the side of the automobile front cover workpiece, completing the clamping operation. For example, the first driving member and the second driving member drive the clamping column to move in the first horizontal direction and the second horizontal direction, respectively, and the third driving member and the fourth driving member drive the clamping column to move accurately in multiple directions. The position sensor and the sensing sheet provide real-time position feedback, enabling the clamping column to accurately align with the side of the workpiece. The clamping parameters include clamping force and clamping column movement speed, which are preset according to the workpiece material, size, and clamping requirements. For example, for an aluminum alloy front cover, a smaller clamping force is required to avoid deformation, and the movement speed needs to be moderate to balance efficiency and accuracy. The control mechanism compares the preset parameters with the real-time data feedback from the sensor through the signal processing unit, generates a clamping control signal, and drives the driving assembly to move the clamping column horizontally along the rack rail (e.g., the third rail or the fourth rail) according to the signal until the clamping column is in close contact with the side of the workpiece, completing the clamping operation.

[0075] In an embodiment, the step of generating a clamping control signal according to the preset clamping parameters and transmitting it to the driving assembly of the control mechanism includes:

[0076] Obtaining the preset clamping parameters corresponding to the automobile front cover workpiece, including the clamping force and the clamping column movement speed;

[0077] Collecting real-time position and contact state data of the side of the automobile front cover workpiece through the displacement sensor and the pressure sensor of the clamping mechanism to generate workpiece state data;

[0078] The signal processing unit of the control mechanism compares the workpiece state data with the preset clamping parameters, calculates the deviation of the workpiece side position from the preset target position and the deviation of the contact pressure, and generates a parameter deviation value;

[0079] The signal processing unit of the control mechanism generates a clamping control signal according to the parameter deviation value, the clamping control signal being used to correct the moving speed of the clamping column and / or the clamping force, and drive the clamping column to move horizontally along the rack track until the clamping column abuts against the side edge of the automobile front cover workpiece, and the clamping operation is completed.

[0080] In the embodiment, the control mechanism acquires preset clamping parameters corresponding to the automobile front cover workpiece, and the acquisition process of the preset clamping parameters can be preset according to the size, shape and material of the automobile front cover workpiece of different models through the storage unit in the control mechanism. The real-time position and contact state data of the side edge of the automobile front cover workpiece are collected through the displacement sensor and the pressure sensor of the clamping mechanism, that is, in the clamping process, the displacement sensor is responsible for detecting the distance of the clamping column relative to the side edge of the workpiece, and the pressure sensor monitors the pressure when the clamping column contacts the workpiece. These sensors work cooperatively to generate workpiece state data containing position and contact state. The signal processing unit of the control mechanism compares the real-time collected position of the clamping column with the preset target position, and calculates the position deviation. For example, if the clamping column has not completely adhered to the side edge of the workpiece, the position deviation can be manifested as the distance difference between the clamping column and the target position. At the same time, the contact pressure data collected by the pressure sensor is compared with the preset clamping force to generate a pressure deviation value. The signal processing unit of the control mechanism generates a clamping control signal according to the parameter deviation value, which is used to correct the moving speed of the clamping column and / or the clamping force. The driving assembly includes a plurality of driving members (such as the first to fifth driving members), which can control the moving direction and speed of the clamping column on different tracks, respectively. For example, when the position deviation indicates that the clamping column is far away from the side edge of the workpiece, the control signal instructs the first driving member or the third driving member to accelerate the horizontal movement of the clamping column; and when the pressure deviation indicates that the clamping force is too large, the control signal reduces the output power of the driving member to reduce the pressure of the clamping column on the workpiece. The clamping control signal drives the clamping column to move horizontally along the rack track until the clamping column abuts against the side edge of the automobile front cover workpiece, and when the clamping column finally adheres to the side edge of the workpiece, the pressure sensor detects that the contact pressure reaches the preset value, and the position sensor confirms that the clamping column has reached the target position, and the control mechanism stops the driving signal immediately, and the clamping operation is completed.

[0081] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automobile hood positioning apparatus, characterized by comprising: The utility model relates to a kind of automobile front cover positioning and clamping device, including: Support (1), a plurality of rack rail (2) are provided on the support (1); Positioning mechanism (3) is arranged on the rack rail (2), the positioning mechanism (3) includes a plurality of positioning column (31) and push assembly (32), one end of the positioning column (31) is connected with the push assembly (32), the other end is used to abut with automobile front cover workpiece, the push assembly (32) is used to push the positioning column (31) reciprocating movement along vertical direction; Clamping mechanism (4) is arranged on the rack rail (2), the clamping mechanism (4) includes a plurality of clamping column (41) and drive assembly (42), the output end of the drive assembly (42) is engaged with the rack rail (2) tooth surface, for driving the clamping column (41) or positioning column (31) reciprocating movement along horizontal direction; Control mechanism (5) is electrically connected with the positioning mechanism (3) and clamping mechanism (4), for controlling the operation of the positioning mechanism (3) and clamping mechanism (4); The rack rail (2) includes first support plate (21), first track (22) and second track (23), the first track (22) is arranged on the first side (11) of the support (1), the first support plate (21) is slidably connected with the first track (22) by first sliding block, the second track (23) is arranged on the first support plate (21), and the first track (22) and the second track (23) are perpendicular to each other; The rack rail (2) further includes second support plate (24), third track (25) and fourth track (26), the third track (25) is arranged on the second side (12) of the support (1), the second support plate (24) is slidably connected with the third track (25) by second sliding block, the first sliding seat (61) is fixedly arranged on the second support plate (24), the fourth track (26) is slidably matched with the groove on the first sliding seat (61), the fourth track (26) is arranged on the second support plate (24), and the third track (25) and the fourth track (26) are perpendicular to each other; The rack rail (2) further includes third support plate (27) and fifth track (28), the third support plate (27) is slidably connected with the third track (25) by third sliding block, the second sliding seat (62) is fixedly arranged on the third support plate (27), the fifth track (28) is slidably matched with the groove on the second sliding seat (62), one end of the fifth track (28) is connected with the positioning column (31); The side of the second support plate (24) and the third support plate (27) is provided with a plurality of position sensors (71), and the fourth track (26) and the fifth track (28) are respectively provided with sensing sheet (72) corresponding to the position sensor (71).

2. The hood positioning apparatus of claim 1, wherein The positioning column (31) comprises a column body (311), a guide sleeve (312) and a flexible contact head (313), the guide sleeve (312) is sleeved on one end of the column body (311) and the output end of the pushing assembly (32), and the flexible contact head (313) is arranged on the other end of the column body (311).

3. The hood positioning apparatus of claim 2, wherein The positioning column (31) further comprises an elastic buffer, a helical spring of the elastic buffer is provided with a pre-compression structure, and the helical spring is embedded in a connecting cavity between the column body (311) and the flexible contact head (313), and is used for absorbing impact force during pushing.

4. The hood positioning apparatus of claim 1, wherein The driving assembly (42) comprises a first driving member (421) and a second driving member (422), the first driving member (421) is used for driving the positioning column (31) and the clamping column (41) to reciprocate along a first horizontal direction on the first track (22), and the second driving member (422) is used for driving the clamping column (41) to reciprocate along a second horizontal direction on the second track (23), and the positioning column (31) is arranged on one end of the first support plate (21) away from the first track (22).

5. The hood positioning apparatus of claim 4, wherein The driving assembly (42) further comprises a third driving member (423) and a fourth driving member (424), the third driving member (423) is used for driving the clamping column (41) to reciprocate along the second horizontal direction on the third track (25), and the fourth driving member (424) is used for driving the fourth track (26) to reciprocate along the first horizontal direction, so as to drive the clamping column (41) to reciprocate along the first horizontal direction.

6. The hood positioning apparatus of claim 5, wherein The driving assembly (42) further comprises a fifth driving member (425), and the fifth driving member (425) is used for driving the fifth track (28) to reciprocate along the first horizontal direction, so as to drive the positioning column (31) to reciprocate along the first horizontal direction.

7. The hood positioning apparatus of claim 1, wherein The display screen (8) is electrically connected with the control mechanism (5), and is used for displaying the running state and position information of the positioning mechanism (3) and the clamping mechanism (4) in real time and realizing man-machine interaction.

8. A hood positioning method for controlling the hood positioning apparatus according to any one of claims 1 to 7, characterized by, The method comprises the following steps: The control mechanism is started, the pushing assembly is controlled to push a plurality of positioning columns to move upward along a vertical direction to a preset initial height, and the initial height is greater than the maximum thickness of the automobile front cover workpiece; The automobile front cover workpiece is placed on the top end of the positioning column, the control mechanism generates a control signal according to the position information fed back by the position sensor and transmits the control signal to the pushing assembly, the pushing assembly adjusts the displacement of each positioning column along the vertical direction according to the control signal, and the bottom surface of the automobile front cover workpiece is kept horizontal; The control mechanism generates a clamping control signal according to the preset clamping parameter and transmits the clamping control signal to the driving assembly, and the driving assembly drives the clamping column to move along the horizontal direction according to the clamping control signal until the clamping column abuts against the side edge of the automobile front cover workpiece, so that the clamping operation on the automobile front cover workpiece is completed.

9. The method of claim 8, wherein, The step that the control mechanism generates a clamping control signal according to the preset clamping parameter and transmits the clamping control signal to the driving assembly comprises: Obtaining preset clamping parameters corresponding to the automobile front cover workpiece, the preset clamping parameters including clamping force and clamping column moving speed; According to the displacement sensor and the pressure sensor of the clamping mechanism, the real-time position and contact state data of the side edge of the automobile front cover workpiece are collected to generate workpiece state data; The signal processing unit of the control mechanism compares the workpiece state data with the preset clamping parameters, calculates the deviation of the workpiece side edge position from the preset target position and the deviation of the contact pressure, and generates a parameter deviation value; The signal processing unit of the control mechanism generates a clamping control signal according to the parameter deviation value, which is used to correct the moving speed of the clamping column and / or the clamping force, and drives the clamping column to move horizontally along the rack track until the clamping column abuts against the side edge of the automobile front cover workpiece, completing the clamping operation.

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