Small spring piece positioning and correction component, device and method

Abstract

The present invention discloses a small shrapnel positioning and deviation correction component, a device and a method. The small shrapnel positioning and deviation correction component comprises a base, a nozzle rod and a positioning nozzle. The base serves as the assembly basis of the entire component. The nozzle rod can be rotatably assembled on the base. The nozzle rod is connected to a rotary drive component that drives the rotation thereof. The positioning nozzle is anti-rotationally connected to the bottom end of the nozzle rod. The positioning nozzle is provided with a first negative pressure adsorption port for adsorbing and positioning the small shrapnel. The first negative pressure adsorption port is connected to an external negative pressure source. The nozzle rod and the positioning nozzle are concentrically provided with locking through holes for electric screwdrivers to pass through. After the electric screwdriver takes out the screw, the locking through holes of the nozzle rod and the positioning nozzle are passed to lock and fix the small shrapnel at the designated position of the product. The above-mentioned small shrapnel positioning and deviation correction component can automatically position and correct the small shrapnel, and assist in automatic high-precision locking assembly. It is not only compact in structure and ingenious in design, but also has a high degree of automation, saves time and effort, has high locking precision and low defective rate.

Description

Technical Field

[0001] The invention belongs to the automatic assembly technology of 3C products, and in particular relates to a small spring piece positioning and deviation correction component, device and method for 3C products. Background Art

[0002] The so-called "3C products" are a general term for computer, communication and consumer electronic products, such as computers, tablet computers, mobile phones or digital audio players. In recent years, the automated assembly technology of 3C products has developed rapidly, and manufacturers have increasingly higher requirements for the assembly of some accessories. Figure 1 As shown, Figure 1 It is a structural schematic diagram of a small shrapnel currently installed on the middle frame of a mobile phone. This type of shrapnel has many external specifications, most of which include a head 1a and a tail 1b, wherein a locking through hole 1c is provided on the head 1a, and the overall external dimensions are about 2x6mm. The thickness of the shrapnel is only 0.08mm, and a small screw is used to lock the small shrapnel at a specified position in the middle frame of the mobile phone through the locking through hole 1c. The locking position accuracy is required to be 0.15mm and the angle deviation is ±2°.

[0003] At present, the assembly of such small shrapnel is mostly done by manually picking up the shrapnel with tweezers and placing it in a manual jig to align the position, and then manually locking it with an electric screwdriver. The process of placing the small shrapnel in the jig is extremely laborious and time-consuming, and the shrapnel will rotate during the locking process, which is very inefficient; the locking accuracy is poor, and the rework rate is high. Summary of the invention

[0004] The object of the present invention is to provide a small spring piece positioning and correction component, device and method to solve the problems of time-consuming, labor-intensive and poor locking accuracy in the small spring piece assembly process in the prior art.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A small spring piece positioning and deviation correction component, comprising:

[0007] The base, as the assembly basis of the entire assembly,

[0008] A nozzle rod is rotatably mounted on the base, and the nozzle rod is connected to a rotary drive assembly that drives the nozzle rod to rotate.

[0009] The positioning nozzle is anti-rotationally connected to the bottom end of the nozzle rod, and the positioning nozzle is provided with a first negative pressure adsorption port for adsorbing and positioning the small spring piece, and the first negative pressure adsorption port is connected to an external negative pressure source.

[0010] The nozzle rod and the positioning nozzle are coaxially provided with locking through holes for the electric screwdriver to pass through. After the electric screwdriver takes out a screw, it passes through the locking through holes of the nozzle rod and the positioning nozzle to lock and fix the small spring piece to a designated position of the product.

[0011] Furthermore, a cavity for assembling the positioning nozzle is provided at the bottom of the nozzle rod, and the positioning nozzle is anti-rotationally assembled in the cavity.

[0012] Preferably, the suction nozzle rod and the base are both provided with a negative pressure channel connected to the first negative pressure adsorption port, and the suction nozzle rod and the base above and below the negative pressure channel are sealed by a sealing ring.

[0013] Furthermore, a floating connection is adopted between the positioning nozzle and the nozzle rod to avoid hard contact between the positioning nozzle and small shrapnel and other peripheral components, while being able to meet the height difference between two positions of small shrapnel of different specifications.

[0014] Preferably, at least one floating spring is provided between the positioning nozzle and the nozzle rod.

[0015] Furthermore, a contoured positioning groove matching the shape of the small spring is provided on the bottom surface of the positioning nozzle, the first negative pressure adsorption port is opened in the contoured positioning groove, and the locking through hole is opened at the head of the contoured positioning groove.

[0016] Furthermore, the rotation drive assembly includes a correction servo motor and a transmission assembly, the correction servo motor is fixedly mounted on the base, the transmission assembly includes two synchronous pulleys and a synchronous belt, one of the synchronous pulleys is fixed on the output shaft of the correction servo motor, and the other synchronous pulley is fixed on the nozzle rod, and the synchronous belt is connected to the two synchronous pulleys.

[0017] A small spring piece positioning and correction device comprises the above-mentioned small spring piece positioning and correction component, a transfer module and a positioning punch. The base of the small spring piece positioning and correction component is fixedly connected to the output flange of the transfer module, and the positioning punch is arranged to cooperate with the contoured positioning groove of the positioning nozzle.

[0018] Furthermore, the positioning convex mold has a contoured positioning surface that matches the shape of the small spring piece, and a positioning column that matches the locking through hole is arranged at one end of the contoured positioning surface to match the head of the small spring piece, and two positioning blocks are arranged at the other end of the contoured positioning surface to match the tail of the small spring piece, and a limiting groove for limiting the tail of the small spring piece is formed between the two positioning blocks. A second negative pressure adsorption port for adsorbing and positioning the small spring piece is also provided on the contoured positioning surface, and the transfer module is configured to drive the positioning nozzle to move to a specified position.

[0019] A small spring piece positioning and deviation correction method, which sequentially positions, corrects and locks the small spring piece through the small spring piece positioning and deviation correction device, comprises the following steps:

[0020] After the product is delivered to the assembly site, it is photographed and positioned through CCD.

[0021] The transfer module drives the positioning nozzle to move to the positioning punch to absorb the small spring piece to pick up the material. After picking up the material, the CCD takes a photo of the position of the small spring piece and calculates the correction angle based on the photo result of the product. The control unit sends a command to the rotary drive component to correct the angle. The specific correction action is: the rotary drive component drives the nozzle rod to rotate and then drives the positioning nozzle to rotate a certain angle to correct the angle.

[0022] The transfer module drives the positioning nozzle to press the small spring piece tightly to the designated locking position on the product.

[0023] The electric screwdriver takes out the screw and passes it through the locking through hole of the nozzle rod and the positioning nozzle and locks and fixes the small spring piece at the locking position through the locking through hole.

[0024] The beneficial effect of the present invention is that compared with the prior art, the small spring piece positioning and correction component, device and method can automatically position, correct and lock the small spring piece, which is not only compact in structure and ingenious in design, but also has a high degree of automation, saves time and effort, has high locking accuracy and a low defective rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a small shrapnel currently installed on the middle frame of a mobile phone;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of a small spring piece positioning and correction device provided by an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of a small spring piece positioning and deviation correction assembly provided by one embodiment of the present invention;

[0028] Figure 4 is an exploded view of a small spring piece positioning and deviation correction assembly provided by an embodiment of the present invention;

[0029] Figure 5 This is a front view of a small spring piece positioning and correction assembly provided by an embodiment of the present invention;

[0030] Figure 6 is a top view of a small spring piece positioning and deviation correction assembly provided by an embodiment of the present invention;

[0031] Figure 7 yes Figure 6 Sectional view along AA direction;

[0032] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle;

[0033] Fig. 9It is a schematic diagram of the three-dimensional structure of a positioning nozzle of a small spring piece positioning and deviation correction assembly provided by an embodiment of the present invention;

[0034] Fig.10 is a cross-sectional view of a positioning nozzle of a small spring piece positioning and deviation correction assembly provided by an embodiment of the present invention;

[0035] Fig.11 It is a three-dimensional structural schematic diagram of a positioning punch of a small spring piece positioning and correction device provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood. It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can also be a central component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] See also Figure 2 As shown, Figure 2It is a schematic diagram of the three-dimensional structure of a small spring piece positioning and correcting device provided by an embodiment of the present invention. In this embodiment, a small spring piece positioning and correcting device includes a small spring piece positioning and correcting component 1, a lifting module 2 and a lower mold 3. The small spring piece positioning and correcting component 1 adopts a double-station mode, including a base 10. Two sets of positioning and correcting mechanisms are arranged on the base 10 to realize the adsorption, positioning and correction of two small spring pieces at the same time. The base 10 is fixedly connected to the lifting module 2. The lifting module 2 drives the base 10 to move up and down as a whole. The lifting module 2 includes a cylinder and a sliding pair composed of a linear guide rail and a slider. In the actual production process, the lifting module 2 can be mounted on a single-axis or double-axis transfer module as needed to realize the transfer function of the base 10 on the X, Z axis, Y, Z axis or X, Y, Z axis. The lower mold 3 is equipped with two sets of positioning and correcting mechanisms, including two positioning punches 30.

[0039] See also Figures 3 to 11 As shown, the two sets of positioning and correcting mechanisms have the same structure, both of which include a nozzle rod 11, a positioning nozzle 12, a correcting servo motor 13, two synchronous pulleys 14, a synchronous belt 15 and two floating springs 16. The nozzle rod 11 adopts a hollow structure and its cross-section is a "T"-shaped structure. The nozzle rod 11 is rotatably assembled on the base 10 through a bearing 17. A cavity for assembling the positioning nozzle 12 is provided at the bottom of the nozzle rod 11. The positioning nozzle 12 is anti-rotationally assembled in the bottom cavity of the nozzle rod 11. A locking through-hole 18 for passing an electric screwdriver is concentrically provided at the center of the nozzle rod 11 and the positioning nozzle 12. The correcting servo motor 13 is vertically fixed on the base 10, and its output shaft is arranged downward. One of the synchronous pulleys 14 is fixed on the top of the nozzle rod 11, and the other synchronous pulley 14 is fixed on the output shaft of the correcting servo motor 13. The synchronous belt 15 is connected between the two synchronous pulleys 14.

[0040] In order to achieve precise positioning of the small shrapnel, the positioning nozzle 12 serves as a positioning upper mold (concave mold), and a contoured positioning groove 120 matching the shape of the small shrapnel is provided on its bottom surface, and a first negative pressure adsorption port 121 is opened in the contoured positioning groove 120, and a locking through hole 18 is opened at the head of the contoured positioning groove 120. A negative pressure channel 122 connected to the first negative pressure adsorption port 121 is provided on the nozzle rod 11 and the base 10, and the negative pressure channel 122 is connected to a negative pressure source, and the nozzle rod 11 and the base 10 above and below the negative pressure channel 122 are sealed by a sealing ring 19 to ensure the sealing and stability of the entire negative pressure channel 122. The positioning punch 30 is arranged on the punch positioning block 300, and the positioning punch 30 has a contoured positioning surface 301 that matches the shape of the small spring piece. A positioning column 302 that matches its locking through hole is arranged at one end of the contoured positioning surface 301 to match the head of the small spring piece. Two positioning blocks 303 are arranged at the other end of the contoured positioning surface 301 to match the tail of the small spring piece. A limiting groove 304 for limiting the tail of the small spring piece is formed between the two positioning blocks 303. A second negative pressure adsorption port 305 for adsorbing and positioning the small spring piece is also provided on the contoured positioning surface 301.

[0041] A floating connection is adopted between the positioning nozzle 12 and the nozzle rod 11, that is, the positioning nozzle 12 can float up and down a certain distance along the bottom cavity of the nozzle rod, and two floating springs 16 are symmetrically installed between the positioning nozzle 12 and the nozzle rod 11 with the center of the positioning nozzle 12. The specific assembly structure is: corresponding assembly grooves are opened on the top surface of the positioning nozzle 12 and the bottom cavity of the nozzle rod 11, and the two ends of the floating spring 16 are respectively assembled in the corresponding assembly grooves to avoid hard contact between the positioning nozzle 12 and small springs and other peripheral components, while being able to meet the height difference between the two positions of small springs of different specifications.

[0042] The above-mentioned small spring piece positioning and deviation correction device can automatically perform positioning, deviation correction and auxiliary locking operations on the small spring piece in sequence. The specific action process includes the following steps:

[0043] 1. After the product is delivered to the assembly site, it is photographed and positioned through CCD.

[0044] 2. Accurate positioning and material taking: the small spring piece is first placed on the positioning punch 30 through the suction nozzle, and its head is positioned through the locking through hole by the positioning column 302, and the tail is positioned by the limit groove 304. At the same time, the second negative pressure adsorption port 305 fixes the small spring piece on the positioning punch 30 through negative pressure adsorption. When the positioning suction nozzle 12 adsorbs and takes materials, the transfer module transfers the positioning suction nozzle 12 to the top of the positioning punch 30, and the lifting module 2 drives the positioning suction nozzle 12 to descend, and the upper and lower molds are closed for positioning. The positioning column 302 penetrates into the locking through hole 18 of the positioning suction nozzle 12, and the contoured positioning groove 120 and the positioning punch 30 are closed to position the small spring piece before taking materials through the first negative pressure adsorption port 121. Therefore, the locking through hole 18 has a dual function. First, it serves as a bypass hole when the electric screwdriver is locking the screw. Second, it serves as a bypass hole for the positioning nozzle 12 to position the positioning column 302 during the process of adsorption and positioning of the material. After the material is taken, the CCD takes a photo of the position of the small spring piece, and the control unit calculates the correction angle according to the photo result of the product.

[0045] 3. The control unit sends a command to the correction servo motor 13. The correction servo motor 13 drives the nozzle rod 11 to rotate through the synchronous pulley 14 and the synchronous belt 15, and then drives the positioning nozzle 12 to rotate a certain angle to automatically correct the angle of the small spring piece. This correction method can ensure that the rotation center is concentric with the through hole of the locking screw corresponding to the positioning nozzle 12, so that the XY reference of the small spring piece will not change when the angle is corrected.

[0046] 4. The transfer module drives the positioning nozzle 12 to press the small spring piece to the designated locking position on the product.

[0047] 5. After taking out the screw, the electric screwdriver passes through the locking through hole 18 of the nozzle rod 11 and the positioning nozzle 12 and locks the small spring piece in the locking position through the locking through hole. During the locking process, the positioning nozzle 12 always presses the small spring piece.

[0048] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A small spring piece positioning and correction device, characterized in that: It includes a small spring piece positioning and correction component, a transfer module and a positioning convex mold. The base of the small spring piece positioning and correction component is fixedly connected to the output flange of the transfer module, and the positioning convex mold is arranged in conjunction with the contoured positioning groove of the positioning nozzle. The small spring piece positioning and deviation correction assembly includes a base as an assembly basis of the entire assembly, a nozzle rod rotatably assembled on the base, the nozzle rod is connected to a rotary drive assembly driving the rotation thereof, a positioning nozzle anti-rotationally connected to the bottom end of the nozzle rod, a first negative pressure adsorption port for adsorbing and positioning the small spring piece is provided on the positioning nozzle, the first negative pressure adsorption port is connected to an external negative pressure source, a locking through hole for an electric screwdriver to pass through is concentrically provided on the nozzle rod and the positioning nozzle, and the electric screwdriver takes out a screw and passes through the locking through holes of the nozzle rod and the positioning nozzle to lock and fix the small spring piece to a designated position of the product; The bottom of the nozzle rod is provided with a cavity for assembling the positioning nozzle, and the positioning nozzle is anti-rotationally assembled in the cavity; The positioning nozzle and the nozzle rod are connected in a floating manner; The positioning convex mold has a contoured positioning surface that matches the shape of the small spring piece, a positioning column that matches the locking through hole is arranged at one end of the contoured positioning surface to match the head of the small spring piece, and two positioning blocks are arranged at the other end of the contoured positioning surface to match the tail of the small spring piece, a limiting groove for limiting the tail of the small spring piece is formed between the two positioning blocks, and a second negative pressure adsorption port for adsorbing and positioning the small spring piece is also opened on the contoured positioning surface, and the transfer module is configured to drive the positioning suction nozzle to move to a specified position.

2. The small spring piece positioning and deviation correction device according to claim 1, characterized in that: The suction nozzle rod and the base are both provided with a negative pressure channel connected to the first negative pressure adsorption port, and the suction nozzle rod and the base above and below the negative pressure channel are sealed by a sealing ring.

3. The small spring piece positioning and deviation correction device according to claim 1, characterized in that: At least one floating spring is arranged between the positioning nozzle and the nozzle rod.

4. The small spring piece positioning and deviation correction device according to claim 1, characterized in that: A contoured positioning groove matching the shape of the small spring is arranged on the bottom surface of the positioning nozzle, the first negative pressure adsorption port is opened in the contoured positioning groove, and the locking through hole is opened at the head of the contoured positioning groove.

5. The small spring piece positioning and deviation correction device according to claim 4, characterized in that: The rotary drive assembly includes a correction servo motor and a transmission assembly, the correction servo motor is fixedly mounted on the base, the transmission assembly includes two synchronous pulleys and a synchronous belt, one of the synchronous pulleys is fixed on the output shaft of the correction servo motor, and the other synchronous pulley is fixed on the nozzle rod, and the synchronous belt is connected to the two synchronous pulleys.

6. A method for positioning and correcting a small spring piece, characterized in that: The small spring piece positioning and deviation correction device according to any one of claims 1 to 5 is used to sequentially position, correct and lock the small spring piece, comprising the following steps: After the product is delivered to the assembly site, it is photographed and positioned through CCD. The transfer module drives the positioning nozzle to move to the positioning punch to absorb the small spring piece to pick up the material. After picking up the material, the CCD takes a photo of the position of the small spring piece and calculates the correction angle based on the photo result of the product. The control unit sends a command to the rotary drive component to correct the angle. The specific correction action is: the rotary drive component drives the nozzle rod to rotate and then drives the positioning nozzle to rotate a certain angle to correct the angle. The transfer module drives the positioning nozzle to press the small spring piece tightly to the designated locking position on the product. The electric screwdriver takes out the screw and passes it through the locking through hole of the nozzle rod and the positioning nozzle and locks and fixes the small spring piece at the locking position through the locking through hole.

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