A new type of placement head for chip placement machine

Abstract

The present invention discloses a novel placement head for a chip mounter, comprising a mounting substrate, a visual positioning camera module arranged on the mounting substrate for taking downward photos, a code scanning module arranged on the mounting substrate for scanning the two-dimensional code information of a product, and four independently operable material taking modules arranged side by side on the mounting substrate, the material taking module comprising a nozzle assembly for sucking materials and a ZR axis motion module for driving the nozzle assembly to move along the Z axis and R axis directions, the ZR axis motion module being connected to the mounting substrate, and the nozzle assembly being connected to the active end of the ZR axis motion module. The novel placement head for a chip mounter provided by the present invention can process four different materials at the same time, significantly reducing the placement time and equipment cost, and improving the overall production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of SMT production, and in particular to a novel placement head of a chip placement machine. Background Art

[0002] A placement machine is a machine used to place surface mount materials on products to be mounted (such as PCB boards). The principle is that the placement head of the placement machine picks up materials at the material picking position, moves to the placement position via the XY axis, and places the materials on the products to be mounted after adjusting the position and direction of the materials.

[0003] At present, the placement head of the existing placement machine is usually equipped with only one suction nozzle for sucking materials, which means that the placement machine can only process one material at the same time. This also leads to some products that need to be mounted with multiple different materials. Multiple placement machines are required to mount different materials on the products to be mounted. For example, the first placement machine mounts material A on the product to be mounted, and the second placement machine mounts material B on the product to be mounted, and so on. Although this approach can realize the placement of multiple materials, it requires multiple machines to work together, which increases equipment costs and operational complexity, and has low production efficiency. Summary of the invention

[0004] In order to overcome the problem in the prior art that the placement head of a placement machine can only process one material at the same time, resulting in difficulty in placing multiple products on the placement machine, the present invention provides a novel placement head for a placement machine.

[0005] The technical solution of the present invention is as follows:

[0006] A novel placement head for a chip placement machine comprises a mounting substrate, a visual positioning camera module arranged on the mounting substrate for taking downward photos, a scanning module arranged on the mounting substrate for scanning the two-dimensional code information of a product, and four material picking modules arranged side by side on the mounting substrate and capable of operating independently, the material picking module comprising a nozzle assembly for sucking materials and a ZR axis motion module for driving the nozzle assembly to move along the Z-axis and R-axis directions, the ZR axis motion module being connected to the mounting substrate, and the nozzle assembly being connected to the movable end of the ZR axis motion module.

[0007] As a preferred solution of the present invention, four vacuum generators are arranged on the mounting substrate, and the four vacuum generators are respectively connected to the suction nozzle assemblies of the four material taking modules.

[0008] As a preferred solution of the present invention, it also includes a protective cover with a lower opening, which is connected to the mounting substrate and covers the visual positioning camera module, the four material picking modules and the four vacuum generators.

[0009] As a preferred solution of the present invention, the side wall of the protective cover is covered with heat dissipation holes.

[0010] As a preferred solution of the present invention, the nozzle assembly includes a nozzle connector arranged at the movable end of the ZR-axis motion module and a nozzle detachably connected to the lower end of the nozzle connector.

[0011] As a preferred solution of the present invention, the nozzle connector comprises a chuck sleeve connected to the movable end of the ZR-axis motion module, a clamping sleeve slidably sleeved on the outer side of the lower end of the chuck sleeve, and a clamping spring arranged between the chuck sleeve and the clamping sleeve, the upper end of the clamping spring is fixed to the chuck sleeve, the lower end of the clamping spring is fixed to the clamping sleeve, a plurality of steel ball holes are circumferentially arranged on the outer side of the lower end of the chuck sleeve, a steel ball is arranged between each of the steel ball holes and the clamping sleeve, the diameter of the steel ball is larger than the diameter of the steel ball hole, the upper end of the clamping sleeve gradually widens from top to bottom, and the upper end of the nozzle is provided with a circle of limiting grooves matching the steel balls;

[0012] As a preferred solution of the present invention, the nozzle connector comprises a connecting sleeve, an upper heat-insulating sleeve and a lower heat-insulating sleeve, the upper end of the connecting sleeve is sleeved on the bottom of the movable end of the ZR-axis motion module, the upper heat-insulating sleeve is sleeved on the lower end of the connecting sleeve, a connecting bottom plate is provided at the bottom of the connecting sleeve, and the lower heat-insulating sleeve is provided between the connecting bottom plate and the nozzle;

[0013] As a preferred solution of the present invention, the upper insulation sleeve is connected to the connecting base plate, the lower insulation sleeve and the suction nozzle by screws.

[0014] As a preferred solution of the present invention, a receiving groove for receiving the upper heat-insulating sleeve and the lower heat-insulating sleeve is provided on the top of the suction nozzle.

[0015] As a preferred solution of the present invention, the four corners of the upper insulation sleeve are provided with a first screw hole, the four corners of the connecting base plate are provided with a screw avoidance opening, the four corners of the lower insulation sleeve are provided with a second screw hole, and the four corners of the bottom of the accommodating groove are provided with a third screw hole, and the screws cooperate with the corresponding first screw holes, the screw avoidance openings, the second screw holes and the third screw holes to connect the upper insulation sleeve, the connecting base plate, the lower insulation sleeve and the suction nozzle together.

[0016] As a preferred solution of the present invention, the closest distance between the periphery of the connecting sleeve and the suction nozzle is greater than or equal to 5 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The novel placement head of the chip placement machine provided by the present invention can process four different materials at the same time by setting four independently operable material taking modules. Compared with the existing equipment that can only process one material at a time, it can significantly reduce the placement time and improve the overall production efficiency;

[0019] 2. For products that need to mount multiple materials, the existing technology usually requires multiple placement machines to work together, while the placement machine using the new placement head only needs one machine to complete the placement of multiple materials, thereby reducing equipment costs; at the same time, due to the reduced operation complexity, maintenance and operating costs can be reduced;

[0020] 3. Four independently operable material-retrieving modules can easily adjust the type and quantity of materials to be mounted according to production needs, allowing the equipment to adapt to more diverse production tasks, improving equipment utilization and the competitiveness of the enterprise;

[0021] 4. By setting up a visual positioning camera module, the placement accuracy is improved;

[0022] 5. By setting up the code scanning module, you can scan the QR code information of the product during the mounting process, store or upload the information, and facilitate subsequent production traceability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a novel placement head of a placement machine in one embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a novel placement machine placement head without a protective cover in one embodiment of the present invention;

[0026] Figure 3 is a cross-sectional view of a nozzle assembly according to an embodiment of the present invention;

[0027] Figure 4 is a cross-sectional exploded view of a nozzle assembly according to an embodiment of the present invention;

[0028] Figure 5 It is a structural schematic diagram of a nozzle assembly in another embodiment of the present invention;

[0029] Figure 6 FIG. 4 is an exploded view of the structure of a nozzle assembly in another embodiment of the present invention.

[0030] In the figure,

[0031] 1. Material picking module; 11. Suction nozzle assembly; 111. Suction nozzle connector; 1111. Chuck sleeve; 1112. Clamping sleeve; 1113. Clamping spring; 1114. Ball hole; 1115. Connecting sleeve; 1116. Upper insulation sleeve; 11161. First screw hole; 1117. Lower insulation sleeve; 11171. Second screw hole; 1118. Connecting base plate; 11181. Screw avoidance port; 112. Suction nozzle; 1121. Limiting groove; 1122. Accommodating groove; 1123. Heat pipe; 12. ZR axis motion module; 2. Mounting substrate; 3. Visual positioning camera module; 4. Barcode scanning module; 5. Vacuum generator; 6. Protective cover; 61. Heat dissipation hole. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. It is also stated that the embodiments described below are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be noted that the terms "install", "set", "connect", "fix" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the application product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, or the orientation or position relationship in which the application product is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] See also Figure 1 , Figure 2This embodiment provides a new type of placement head for a placement machine, which is applied to the placement robot of the placement machine, including a mounting substrate 2, a visual positioning camera module 3 arranged on the mounting substrate 2 for taking photos downward, a code scanning module 4 arranged on the mounting substrate 2 for scanning the two-dimensional code information of the product, and four material picking modules 1 arranged side by side and compactly on the mounting substrate 2. The material picking module 1 includes a suction nozzle assembly 11 for sucking materials and a ZR axis motion module 12 for driving the suction nozzle assembly 11 to move along the Z axis and R axis directions. The ZR axis motion module 12 is connected to the mounting substrate 2, and the suction nozzle assembly 11 is connected to the movable end of the ZR axis motion module 12. By setting four material picking modules 1 that are compactly distributed side by side, not only can different materials be sucked, but the structure is also smaller and lighter, and when installed on the placement robot, it can move faster. The visual positioning camera module 3 is used to determine whether the material is offset by taking pictures. If the material is identified to be offset, the ZR axis motion module 12 is controlled according to the offset angle of the material to drive the nozzle assembly 11 to rotate a certain angle to compensate for the position of the calibration material and ensure the quality of mounting. The code scanning module 4 is used to scan the product and store or upload the product information to facilitate subsequent production traceability of the product.

[0035] The novel SMT mounting head of the present embodiment can process four different materials at the same time by setting four independently operable material taking modules 1. Compared with the existing equipment which can only process one material at a time, it can significantly reduce the mounting time and improve the overall production efficiency. For products that need to mount multiple materials, the existing technology usually requires multiple SMT machines to work together, while the SMT machine using the novel SMT mounting head only needs one machine to complete the mounting of multiple materials, thereby reducing the equipment cost. At the same time, due to the reduced operation complexity, the maintenance and operation costs can be reduced. The four independently operable material taking modules 1 can easily adjust the type and quantity of the mounted materials according to the production needs, so that the equipment can adapt to more diversified production tasks, thereby improving the utilization rate of the equipment and the competitiveness of the enterprise.

[0036] See also Figure 2 In one embodiment, four vacuum generators 5 are provided on the mounting substrate 2, and the four vacuum generators 5 are respectively connected to the suction nozzle assemblies 11 of the four material taking modules 1. The four vacuum generators 5 can provide stable vacuum suction for the suction nozzle assemblies 11 of the four material taking modules 1, ensuring that the material can be firmly sucked on the suction nozzle assembly 11, avoiding the material from falling off or shifting during the movement, thereby improving the accuracy and stability of the mounting.

[0037] See also Figure 1In one embodiment, the new type of placement machine placement head also includes a protective cover 6 with a lower opening. The protective cover 6 is made of sheet metal. The protective cover 6 is connected to the mounting substrate 2 and covers the visual positioning camera module 3, four material picking modules 1 and four vacuum generators 5. The protective cover 6 plays the role of protecting the visual positioning camera module 3, four material picking modules 1 and four vacuum generators 5 on the placement head. When placed in the installation or placement process, the placement head accidentally touches various objects, causing damage to the placement head. In addition, the side wall of the protective cover 6 is covered with heat dissipation holes 61, which helps to discharge the heat generated by the internal components in time during the placement process to prevent performance degradation or failure due to overheating.

[0038] See also Figure 2 In one embodiment, the nozzle assembly 11 includes a nozzle connector 111 disposed at the movable end of the ZR-axis motion module 12 and a nozzle 112 detachably connected to the lower end of the nozzle connector 111. Since the nozzle 112 is detachably connected to the nozzle connector 111, it is convenient to disassemble and replace nozzles 112 of different sizes to adapt to materials of different sizes, and to replace damaged nozzles 112.

[0039] See also Figure 3 , Figure 4In one embodiment, the nozzle connector 111 includes a chuck sleeve 1111 connected to the movable end of the ZR-axis motion module 12, a clamping sleeve 1112 slidably sleeved on the outer side of the lower end of the chuck sleeve 1111, and a clamping spring 1113 arranged between the chuck sleeve 1111 and the clamping sleeve 1112. The upper end of the clamping spring 1113 is fixed to the chuck sleeve 1111, and the lower end of the clamping spring 1113 is fixed to the clamping sleeve 1112. A plurality of steel ball holes 1114 are circumferentially arranged on the outer side of the lower end of the chuck sleeve 1111, and a steel ball is arranged between each steel ball hole 1114 and the clamping sleeve 1112. The diameter of the steel ball is larger than the diameter of the steel ball hole 1114 to prevent the steel ball from completely passing through the steel ball hole 1114 and falling out. The upper end of the clamping sleeve 1112 gradually widens from top to bottom, and a circle of limiting grooves 1121 cooperating with steel balls are provided at the upper end of the suction nozzle 112. In the absence of external force, the clamping sleeve 1112 is always kept at the lower end of the chuck sleeve 1111 under the elastic force of the clamping spring 1113. At this time, the gap between the inner wall of the upper end of the clamping sleeve 1112 and the steel ball hole 1114 of the chuck sleeve 1111 is the narrowest. The steel ball is pressed inwardly under the action of the clamping sleeve 1112, so that one end of the steel ball passes through the steel ball hole 1114 and enters the limiting groove 1121 of the suction nozzle 112, so that the upper end of the suction nozzle 112 is clamped at the lower end of the chuck sleeve 1111 under the action of multiple steel balls. After the clamping sleeve 1112 is pushed up by external force, the gap between the upper inner wall of the clamping sleeve 1112 and the steel ball hole 1114 of the chuck sleeve 1111 gradually widens. At this time, the clamping sleeve 1112 does not squeeze the steel ball, and the suction nozzle 112 can be easily pulled out from the lower end of the chuck sleeve 1111.

[0040] See also Figure 5 , Figure 6 In another embodiment, a heating tube 1123 and a thermocouple are provided in the suction nozzle 112. The heating tube 1123 is used to transfer heat energy to the suction nozzle 112, and the suction nozzle 112 then transfers the heat to the picked up material, so as to heat the material while picking up the material. The thermocouple is used to detect the heating temperature of the heating tube 1123 in real time, so as to control the heating temperature of the heating tube 1123. Since the mounting of some materials requires heating to complete the bonding, the suction nozzle 112 can be well applied to these materials that need to be heated for mounting. If the material does not need to be heated, the heating tube 1123 does not need to be started. The suction nozzle connector 111 is a heat insulating member, which is used to separate the ZR axis motion module 12 and the suction nozzle 112, and plays a heat insulating role to prevent the heat generated by the suction nozzle 112 from being transferred to the ZR axis motion module 12, thereby affecting the normal operation of the equipment.

[0041] Specifically, the nozzle connector 111 includes a connecting sleeve 1115, an upper heat-insulating sleeve 1116 and a lower heat-insulating sleeve 1117. The upper end of the connecting sleeve 1115 is sleeved on the bottom of the movable end of the ZR-axis motion module 12, the upper heat-insulating sleeve 1116 is sleeved on the lower end of the connecting sleeve 1115, a connecting bottom plate 1118 is provided at the bottom of the connecting sleeve 1115, and the lower heat-insulating sleeve 1117 is provided between the connecting bottom plate 1118 and the nozzle 112. The upper heat-insulating sleeve 1116 is connected to the connecting bottom plate 1118, the lower heat-insulating sleeve 1117 and the nozzle 112 by screws, so as to realize the connection of the connecting sleeve 1115 and the nozzle 112. Among them, the top of the nozzle 112 is provided with a receiving groove 1122 for receiving the upper heat-insulating sleeve 1116 and the lower heat-insulating sleeve 1117, so that the structure of the nozzle 112 assembly is more compact and stable. Since the connection sleeve 1115 is surrounded by an upper heat insulating sleeve 1116 and a lower heat insulating sleeve 1117, the heat energy generated by the suction nozzle 112 will not be transferred to the ZR axis motion module 12. Preferably, the closest distance between the connection sleeve 1115 and the suction nozzle 112 is greater than or equal to 5 mm, and the heat insulation effect is better in this state.

[0042] In addition, in order to realize the connection between the upper insulation sleeve 1116, the connecting base plate 1118, the lower insulation sleeve 1117 and the suction nozzle 112, the four corners of the upper insulation sleeve 1116 are provided with first screw holes 11161, the four corners of the connecting base plate 1118 are provided with screw avoidance openings 11181, the four corners of the lower insulation sleeve 1117 are provided with second screw holes 11171, and the four corners of the bottom of the accommodating groove 1122 are provided with third screw holes. The screws cooperate with the corresponding first screw holes 11161, screw avoidance openings 11181, second screw holes 11171 and third screw holes to connect the upper insulation sleeve 1116, the connecting base plate 1118, the lower insulation sleeve 1117 and the suction nozzle 112 together.

[0043] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0044] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A new type of placement head for a placement machine, characterized in that: It includes an installation base plate, a visual positioning camera module arranged on the installation base plate for taking downward photos, a scanning module arranged on the installation base plate for scanning the two-dimensional code information of the product, and four material picking modules arranged side by side on the installation base plate and capable of operating independently, the material picking module includes a suction nozzle assembly for sucking materials and a ZR axis motion module for driving the suction nozzle assembly to move along the Z-axis and R-axis directions, the ZR axis motion module is connected to the installation base plate, and the suction nozzle assembly is connected to the movable end of the ZR axis motion module.

2. The new chip placement machine placement head according to claim 1 is characterized in that: Four vacuum generators are arranged on the installation base plate, and the four vacuum generators are respectively connected to the suction nozzle assemblies of the four material taking modules.

3. The new chip placement machine placement head according to claim 2 is characterized in that: It also includes a protective cover with a lower opening, which is connected to the mounting substrate and covers the visual positioning camera module, the four material taking modules and the four vacuum generators.

4. The new chip placement machine placement head according to claim 3 is characterized in that: The side wall of the protective cover is covered with heat dissipation holes.

5. The new chip placement machine placement head according to claim 1 is characterized in that: The suction nozzle assembly includes a suction nozzle connector arranged at the movable end of the ZR-axis motion module and a suction nozzle detachably connected to the lower end of the suction nozzle connector.

6. The new chip placement machine placement head according to claim 5 is characterized in that: The nozzle connector includes a chuck sleeve connected to the movable end of the ZR-axis motion module, a clamping sleeve slidably mounted on the outer side of the lower end of the chuck sleeve, and a clamping spring arranged between the chuck sleeve and the clamping sleeve, the upper end of the clamping spring is fixed to the chuck sleeve, the lower end of the clamping spring is fixed to the clamping sleeve, a plurality of steel ball holes are circumferentially arranged on the outer side of the lower end of the chuck sleeve, a steel ball is arranged between each of the steel ball holes and the clamping sleeve, the diameter of the steel ball is larger than the diameter of the steel ball hole, the upper end of the clamping sleeve gradually widens from top to bottom, and the upper end of the nozzle is provided with a circle of limiting grooves matching the steel balls.

7. The new chip placement machine placement head according to claim 5 is characterized in that: The nozzle connector includes a connecting sleeve, an upper heat-insulating sleeve and a lower heat-insulating sleeve. The upper end of the connecting sleeve is sleeved on the bottom of the movable end of the ZR-axis motion module, the upper heat-insulating sleeve is sleeved on the lower end of the connecting sleeve, a connecting base plate is provided at the bottom of the connecting sleeve, the lower heat-insulating sleeve is provided between the connecting base plate and the nozzle, and the nozzle is provided with a heating tube and a thermocouple.

8. The new chip placement machine placement head according to claim 7 is characterized in that: The upper heat-insulating sleeve is connected to the connecting bottom plate, the lower heat-insulating sleeve and the suction nozzle through screws.

9. The novel placement head of the placement machine according to claim 8 is characterized in that: The top of the suction nozzle is provided with a receiving groove for receiving the upper heat-insulating sleeve and the lower heat-insulating sleeve.

10. The novel placement head of the placement machine according to claim 9, characterized in that: The four corners of the upper insulation sleeve are each provided with a first screw hole, the four corners of the connecting bottom plate are provided with a screw avoidance opening, the four corners of the lower insulation sleeve are provided with a second screw hole, and the four corners of the bottom of the accommodating groove are provided with a third screw hole, and the screws cooperate with the corresponding first screw holes, the screw avoidance openings, the second screw holes and the third screw holes to connect the upper insulation sleeve, the connecting bottom plate, the lower insulation sleeve and the suction nozzle together.

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