Riveting equipment and automatic riveting method for piston parts of four-way reversing valve

Abstract

The present invention relates to a riveting device and an automatic riveting method for a piston component of a four-way reversing valve, wherein the riveting device for the piston component of a four-way reversing valve comprises: a turntable and a driving device for driving the turntable to rotate, a plurality of tooling components are circumferentially distributed on the upper surface of the turntable, and further comprises: a feeding mechanism for feeding the piston component into the corresponding tooling component; a riveting mechanism for riveting the piston component in the tooling component; the detection mechanism for detecting the piston component after riveting; and a unloading mechanism for removing the piston component after detection from the tooling component. The present invention can improve the processing efficiency of riveting the piston component.

Description

Technical Field

[0001] The invention relates to the field of automated mechanical equipment, and in particular to a riveting device and an automatic riveting method for a piston component of a four-way reversing valve. Background Art

[0002] Four-way valves are widely used in air conditioning systems to achieve the conversion between cooling and heating. This conversion is mainly achieved by the movement of the piston component reversing assembly. The piston component reversing assembly is mainly composed of a connecting rod and piston components installed at both ends of the connecting rod. At present, most piston components are fixed by manual hand-held special tools, which has low processing efficiency. Summary of the invention

[0003] Based on this, it is necessary to provide a riveting device and an automatic riveting method for a four-way reversing valve piston component to improve the processing efficiency of the piston component.

[0004] The present invention provides a riveting device for a piston component of a four-way reversing valve, comprising: a turntable and a driving device for driving the turntable to rotate, wherein a plurality of tooling components are circumferentially distributed on the upper surface of the turntable, and further comprising:

[0005] A feeding mechanism for feeding the piston component into the corresponding tooling assembly;

[0006] A riveting mechanism for riveting piston components within a tooling assembly;

[0007] The detection mechanism for detecting the piston component after riveting is completed;

[0008] After the inspection, the piston component is removed from the unloading mechanism of the tooling assembly.

[0009] In one embodiment, the feeding mechanism includes a rivet feeding mechanism, an outer baffle feeding mechanism, a piston bowl feeding mechanism, a toothed spring feeding mechanism, and an inner baffle feeding mechanism, which are arranged along the rotation direction of the turntable and are used to feed corresponding parts into the tooling assembly for preassembly into a piston component.

[0010] The preassembled piston component comprises an outer baffle plate, a piston bowl, a toothed spring and an inner baffle plate which are stacked in sequence from bottom to top, and each part is provided with a rivet hole corresponding to the position and penetrated with a rivet.

[0011] In one embodiment, the rivet feeding mechanism, the outer baffle feeding mechanism, the piston bowl feeding mechanism, the toothed spring feeding mechanism, and the inner baffle feeding mechanism respectively include:

[0012] Screening drum used to hold and transport corresponding parts;

[0013] Pick up corresponding parts from the output end of the screening drum and transfer them to the feeding and picking head on the tooling assembly;

[0014] A mechanical arm that supports and drives the feeding and picking head to move.

[0015] In one embodiment, the riveting mechanism has a stamping part that acts on the rivet, and the stamping part includes a main pressing head and a pre-pressing head movably connected below the main pressing head. The bottom surface of the pre-pressing head is a working surface that directly acts on the rivet, and an elastic member is provided between the main pressing head and the pre-pressing head.

[0016] In one embodiment, the detection mechanism includes:

[0017] Fixed installation test bench;

[0018] A lifting seat slidably mounted on the detection table;

[0019] A detection cylinder installed on the detection platform to drive the lifting seat to move;

[0020] A detection needle disposed on the lifting seat for contacting and detecting a rivet on the piston component;

[0021] and a detection circuit connected to the detection needle.

[0022] In one embodiment, the unloading mechanism comprises:

[0023] Fixed mounted unloading platform;

[0024] A transverse seat slidably matched with the unloading platform;

[0025] A first cylinder installed on the unloading platform to drive the transverse shift seat;

[0026] A longitudinal movement seat slidably matched with the transverse movement seat;

[0027] A second cylinder mounted on the transverse shift seat and driving the longitudinal shift seat;

[0028] A discharging and picking head is arranged on the longitudinal shift seat and is used for removing the piston component from the tooling assembly.

[0029] In one embodiment, the unloading mechanism further comprises:

[0030] A discharging platform, fixedly connected to the unloading platform;

[0031] A transfer groove is provided on the top surface of the discharging platform, one end of the transfer groove is an inlet for receiving the piston component from the pickup head, and the other end of the transfer groove is an outlet for outputting the piston component;

[0032] A material pushing component is slidably mounted on the material discharging platform, and the material pushing component has a working state of entering the transfer groove inlet and pushing the piston component toward the transfer groove outlet, and a reset state of moving out of the transfer groove inlet;

[0033] A driving mechanism is installed on the discharging platform and is used to drive the pushing part to switch states.

[0034] In one of the embodiments, the tooling assembly includes a tooling base fixed on the turntable, a piston component accommodating groove is provided on the tooling base, and a rivet positioning hole is provided at the bottom of the piston component accommodating groove.

[0035] In one embodiment, the pick-up head of the unloading part and the pick-up head of the feeding part are electromagnets, pneumatic grippers or vacuum suction cups respectively.

[0036] The present invention also provides an automatic riveting method for a four-way reversing valve piston component, using the riveting device for a four-way reversing valve piston component according to any one of claims 1 to 9 to implement the following steps:

[0037] (1) Feeding: Feeding the rivet, outer baffle, piston bowl, toothed spring, and inner baffle into the corresponding tooling assembly on the upper surface of the turntable in sequence to form a pre-assembled piston component;

[0038] (2) Riveting: Riveting the pre-assembled piston parts in the tooling assembly;

[0039] (3) Inspection: inspect the piston parts after riveting;

[0040] (4) Unloading: Remove the riveted piston components from the tooling assembly.

[0041] The riveting equipment and automatic riveting method for the piston components of the four-way reversing valve of the present invention can improve the processing efficiency of the piston components, and the rivets, piston bowl, outer baffle plate, toothed spring and inner baffle plate of the piston components in the four-way reversing valve are fully automatically assembled, riveted and tested, so that the piston components can be quickly formed and assembled, and the time of the entire processing procedure is reduced to 3 seconds, thereby improving the processing efficiency. At the same time, the depth deviation of the riveting is small and the product precision is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a riveting device for a piston component of a four-way reversing valve according to an embodiment of the present invention.

[0043] Figure 2 yes Figure 1 Top view of the .

[0044] Figure 3 yes Figure 1 Schematic diagram of the structure of the piston component of the piston component of the middle four-way reversing valve.

[0045] Figure 4 yes Figure 3 Schematic diagram of the structural decomposition of the piston components of the four-way reversing valve.

[0046] Figure 5 yes Figure 1 Schematic diagram of the structure of the tooling components.

[0047] Figure 6 yes Figure 1 Schematic diagram of the structure of the middle rivet feeding mechanism.

[0048] Figure 7 yes Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0049] Figure 8 yes Figure 1 Schematic diagram of the structure of the middle and outer baffle feeding mechanism.

[0050] Fig. 9 yes Figure 8 A partial enlarged schematic diagram of point D in the middle.

[0051] Fig.10 yes Figure 1 Schematic diagram of the structure of the piston bowl feeding mechanism.

[0052] Fig.11 yes Figure 1 Schematic diagram of the structure of the medium tooth spring feeding mechanism.

[0053] Fig.12 yes Figure 1 Schematic diagram of the structure of the middle and inner baffle feeding mechanism.

[0054] Fig.13 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0055] Fig.14 yes Figure 1 A local enlarged schematic diagram of point B in the middle.

[0056] Fig.15 yes Figure 1 Schematic diagram of the structure of the middle unloading mechanism.

[0057] Main component symbols

[0058]

[0059]

[0060]

[0061]

[0062] The following specific implementation modes will further illustrate the present invention in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0063] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art 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.

[0065] See also Figures 1 to 15 A riveting device for a piston component of a four-way reversing valve includes a turntable 6 and a driving device (not shown) for driving the turntable 6 to rotate. A plurality of tooling assemblies 7 are circumferentially distributed on the upper surface of the turntable 6. The device also includes: a feeding mechanism 1 for feeding a piston component 5 into a corresponding tooling assembly 7; a riveting mechanism 2 for riveting the piston component 5 in the tooling assembly 7; the detection mechanism 3 for detecting the piston component 5 after riveting; and a unloading mechanism 4 for moving the piston component 5 out of the tooling assembly 7 after riveting.

[0066] In the riveting equipment of this embodiment, the driving device of the turntable 6 can adopt the existing technology, for example, a motor is used as the power to drive the turntable 6 to rotate around a vertical axis through gear transmission. When the turntable 6 is working, it can cooperate with the visual system and the rotating divider for positioning.

[0067] Parts of the four-way reversing valve piston assembly 5, such as Figure 3 , Figure 4 As shown, it includes an outer baffle plate 52, a piston bowl 53, a toothed spring 54, an inner baffle plate 55 and a rivet 51, wherein the outer baffle plate 52, the piston bowl 53, the toothed spring 54 and the inner baffle plate 55 are correspondingly provided with rivet holes 56, and the rivet 51 passes through the rivet holes 56 and correspondingly penetrates the outer baffle plate 52, the piston bowl 53, the toothed spring 54 and the inner baffle plate 55.

[0068] The turntable 6, the feeding mechanism 1, the riveting mechanism 2, the detection mechanism 3, and the unloading mechanism 4 are installed on the corresponding operating table, which can be an integrated or split structure. In order to facilitate installation and maintenance, the operating tables of some mechanisms can be integrated, while the operating tables of some mechanisms can be independently set. The operating table of the turntable 6 can be seen in the figure. Specifically, a hollow area 61 is provided on the turntable 6 to reduce the weight of the turntable 6 itself and facilitate rotation.

[0069] Each set of tooling assembly 7 is used to contain and position the four-way reversing valve piston component 5. As the turntable 6 rotates, each part including the rivet in the four-way reversing valve piston component 5 is placed in each set of tooling assembly 7 through the feeding mechanism 1 one by one, so as to facilitate the operation of the subsequent process. Each set of tooling assembly 7 is evenly distributed along the circumference, and its position can be slightly close to the outer edge of the turntable 6 to reduce the conveying distance of the feeding mechanism 1.

[0070] In one embodiment, if Figure 5 As shown, the tooling assembly 7 includes a tooling base 71 fixed on the turntable 6, and a piston component receiving groove 72 is provided on the tooling base 71, and a rivet positioning hole 73 is provided at the bottom of the piston component receiving groove 72. As the turntable 6 rotates, the various parts of the piston component 5 are sequentially fed into the tooling assembly 7 through the feeding mechanism 1. In order to achieve accurate assembly of the various components of the piston component 5, a rivet positioning hole 73 is provided at the bottom of the piston component receiving groove 72. The rivet 51 is positioned by placing the rivet 51 into the rivet positioning hole 73, and the outer baffle 52, the piston bowl 53, the toothed spring 54 and the inner baffle 55 then pass through the positioned rivet 51 through the corresponding rivet holes 56, so as to achieve the positioning of the outer baffle 52, the piston bowl 53, the toothed spring 54 and the inner baffle 55, and better positioning can be achieved. Specifically, there are two rivet positioning holes 73 , and the outer baffle plate 52 , the piston bowl 53 , the toothed spring 54 and the inner baffle plate 55 are correspondingly provided with two rivet holes 56 for easy positioning.

[0071] The feeding mechanism 1 can be provided in multiple sets according to the types and quantities of parts in the four-way reversing valve piston component 5, and arranged on the periphery of the turntable 6 in a pre-assembled order.

[0072] After the various parts of the four-way reversing valve piston component 5 are pre-assembled in the corresponding tooling assembly, when the tooling assembly 7 moves to the riveting mechanism 2 along with the turntable 6, the riveting mechanism 2 rivets the piston component 5. The riveting principle and specific operation method are not the focus of improvement in this embodiment, but improvement methods are also provided in other implementation methods below.

[0073] After riveting is completed, the riveted piston component 5 is inspected by the detection mechanism 3, for example, by detecting the position or shape of the rivet, etc., to determine whether the riveting of the piston component 5 is completed. After the determination is completed, as the turntable 6 rotates, the tooling assembly containing the piston component 5 of the four-way reversing valve enters the next station, that is, the piston component 5 after the inspection is unloaded by the unloading mechanism 4, and the piston component 5 is removed from the tooling assembly 7 on the turntable 6; of course, if the detection mechanism 3 determines that it is abnormal, for example, there is no rivet at the predetermined position, or the shape of the rivet indicates that the riveting is abnormal, an alarm can be issued and wait for processing, and the control system can also separate the piston component 5 with riveting abnormality through the unloading mechanism 4 when the tooling assembly enters the next station.

[0074] In one embodiment, in order to better realize automation, the feeding mechanism 1 includes a rivet feeding mechanism 11, an outer baffle feeding mechanism 12, a piston bowl feeding mechanism 13, a toothed spring feeding mechanism 14, and an inner baffle feeding mechanism 15, which are arranged along the rotation direction of the turntable 6 and are used to feed the corresponding parts into the tooling assembly 7 for preassembly into the piston component 5. The preassembled piston component 5 includes an outer baffle 52, a piston bowl 53, a toothed spring 54, and an inner baffle 55 stacked in sequence from bottom to top, and each part is provided with a rivet hole 56 corresponding to the position and pierced with a rivet 51. As an alternative, the feeding mechanism 1 can be concentrated into one feeding mechanism 1, and the preassembled piston component 5 is directly fed into the turntable 6, instead of having to feed the corresponding parts into the turntable 6 by sequentially setting the rivet feeding mechanism 11, the outer baffle feeding mechanism 12, the piston bowl feeding mechanism 13, the toothed spring feeding mechanism 14, and the inner baffle feeding mechanism 15.

[0075] Correspondingly, there are eight tooling assemblies 7, which are distributed on the upper surface of the turntable 6 and are centrally symmetrically distributed. During the rotation of the turntable 6, the tooling assemblies 7 correspond to the positions of the rivet feeding mechanism 11, the outer baffle feeding mechanism 12, the piston bowl feeding mechanism 13, the toothed spring feeding mechanism 14, the inner baffle feeding mechanism 15, the riveting mechanism 2, the detection mechanism 3, and the unloading mechanism 4, respectively, forming corresponding workstations for feeding, riveting, detection, and unloading.

[0076] Among them, the rivet feeding mechanism 11, the outer baffle feeding mechanism 12, the piston bowl feeding mechanism 13, the toothed spring feeding mechanism 14, and the inner baffle feeding mechanism 15 can also be regarded as sub-units of the feeding mechanism for conveying corresponding parts.

[0077] like Figure 6 , Figure 7As shown, taking the rivet feeding mechanism 11 as an example, it includes a screening drum 16, a feeding pick-up head 17, and a mechanical arm 18. The screening drum 16 receives and transports the various parts of the piston component 5 to the output end 162c of the screening drum 16, so that the feeding pick-up head 17 can pick up various parts from the output end 162c of the screening drum 16. The feeding pick-up head 17 is driven by the mechanical arm 18 to transfer various parts to the tooling assembly 7. Among them, the screening drum 16 includes a conveying frame 161, which is used to convey and transport the various parts of the piston component 5. In order to speed up the feeding efficiency of the conveying frame 161, a vibrator 163 is provided at the lower end of the conveying frame 161.

[0078] The rivet feeding mechanism 11 is also provided with a feeding table 162 for receiving various parts from the conveying rack 161, and a feeding groove 162a is provided on the top surface of the feeding table 162, a feeding component 162b is slidably installed and matched with the feeding groove 162a, an output end 162c connected to the feeding groove 162a, and a feeding driving mechanism 162d for driving the feeding component 162b to move along the feeding groove 162a.

[0079] Furthermore, the output end 162c is a concave hole set on the feeding component 162b, the concave hole passes through an edge of the feeding component 162b and the opening of the concave hole faces the inner wall of the feeding trough 162a, and the position of the concave hole changes with the movement of the feeding component 162b. Specifically, the rivets 51 are transported in two rows side by side, and the number of concave holes is also two, corresponding to one of the rows of rivets. When the position of the concave hole corresponds to the rivet 51 from the conveying rack 161, the rivet 51 enters the concave hole, and then the feeding component 162b moves, so that the concave hole is misaligned with the rivet 51 conveying queue, that is, the concave hole of the feeding component 162b carries the rivet into the rivet picking head 171 directly below, and at the same time, the side of the feeding component 162b also blocks the rivet 51 conveying queue.

[0080] In one embodiment, the robot arm 18 includes: a fixed bracket 181 fixedly installed relative to the feeding table 162, a feeding transverse shift seat 182 slidably installed on the fixed bracket 181, a feeding longitudinal shift seat 183 slidably installed with the feeding transverse shift seat 182, a feeding first cylinder 184 driving the feeding transverse shift seat 182 to move in a horizontal direction, a feeding second cylinder 185 driving the feeding longitudinal shift seat 183 to move in a vertical direction, and the feeding picking head 17 is fixedly installed on the feeding longitudinal shift seat 183.

[0081] The first feeding cylinder 184 and the second feeding cylinder 185 jointly drive the feeding picking head 17 away from or close to the turntable. For example, the first feeding cylinder 184 drives the feeding picking head 17 to move radially along the turntable 6, and the second feeding cylinder 185 drives the feeding picking head 17 to move axially along the turntable 6. Driven by the second feeding cylinder 185, the feeding picking head 17 picks up the parts in the output end 162c, and driven by the first feeding cylinder 184, moves them from the output end 162c to the corresponding position on the tooling assembly 7, and finally, driven by the second feeding cylinder 185, places the corresponding parts into the tooling assembly 7.

[0082] The movement process of the rivet feeding mechanism 11 is as follows: the rivets 51 from the conveying rack 161 are transported to the feeding slot 162a on the top surface of the feeding table 162, and the feeding driving mechanism 162d drives the feeding component 162b to push each part to the output end 162c, and the output end 162c corresponds to the position of the feeding pickup head 17. The first feeding cylinder 184 drives the feeding transverse displacement seat 182 slidably mounted on the fixed bracket 181 to move horizontally, and the second feeding cylinder 185 drives the feeding longitudinal displacement seat 183 to move vertically. Driven by the second feeding cylinder 185, the feeding pickup head 17 picks up the corresponding parts at the output end 162c, and under the drive of the first feeding cylinder 184, moves from the output end 162c to the corresponding position on the tooling assembly 7, and finally puts the corresponding parts into the tooling assembly 7 under the drive of the second feeding cylinder 185.

[0083] like Figure 7 As shown, the rivet picking head 171 is a pneumatic clamp. To drive the movement of the pneumatic clamp, a corresponding cylinder controls its movement. Further, the pneumatic clamp is two clamps that are abutted against each other, and the abutting surfaces of the two clamps are provided with a receiving hole for placing the rivet 51. Under the action of the cylinder, the two clamps can be moved closer to or separated from each other.

[0084] like Figure 8 , Fig. 9 The outer baffle feeding mechanism 12 shown has a structure and a movement path that are generally consistent with the rivet feeding mechanism 11, and the difference lies in: a feeding table 163 for receiving the outer baffle 52, a feeding groove 163a is provided on the top surface of the feeding table 163, a feeding component 163b is slidably installed and matched in the feed groove 163a, an output end 163c connected to the feed groove 163a, a feeding drive mechanism 163d that drives the feed component 163b to move along the feed groove 163a, and the output end 163c and the feeding component 163b are respectively installed at both ends of the feed groove 163a. When the outer baffle 52 is transported to the feed slot 163a on the top surface of the feeding table 163, the feeding drive mechanism 163d drives the feeding component 163b to push the outer baffle to the output end 163c, and the output end 163c corresponds to the position of the outer baffle picking head 172 to facilitate the outer baffle picking head 172 to perform the picking operation.

[0085] Furthermore, a receiving groove is provided in the vacuum suction cup, and the outer baffle 52 is placed in the receiving groove during adsorption.

[0086] like Fig.10 The piston bowl feeding mechanism 13 shown in the figure has a structure and a movement path that are substantially the same as those of the outer baffle feeding mechanism 12, except that the feeding pickup head 17 of the piston bowl feeding mechanism 13 is a piston bowl pickup head 173; the feeding transverse shift seat 182 is provided with a visual system detection component 19 and a corresponding circuit connected thereto to detect the corresponding positions of the piston bowl pickup head 173, the output end 163c and the tooling assembly 7, control the precise positioning of the feeding pickup head 17, pick up the corresponding parts from the output end 162c and place the piston bowl 53 into the feeder 182; In the tooling assembly 7, the feeding pickup head 17 is precisely detected and controlled to pick up the piston bowl 53 from the output end 162c and place it into the corresponding tooling assembly 7; in order to increase the stability of the feeding transverse shift seat 182A and ensure the better operation of the visual system detection component 19, the cylinder body of the first feeding cylinder 184A also serves as the slide rail of the feeding transverse shift seat 182A. Specifically, the first feeding cylinder 184A is provided with a protrusion facing the side of the feeding transverse shift seat 182A, and the feeding transverse shift seat 182A is provided with a groove that slides with the protrusion. Correspondingly, the second feeding cylinder 185A drives the feeding longitudinal shift seat 183A to move in the vertical direction. It can be understood that other feeding mechanisms 1 or unloading mechanisms 4 can also be equipped with a visual system detection component 19 accordingly, not limited to the rivet feeding mechanism. The visual system detection component 19 can be a camera.

[0087] like Fig.11 The toothed spring feeding mechanism 14 shown in FIG. Fig.12 The structure and movement path of the inner baffle feeding mechanism 15 shown are substantially consistent with those of the outer baffle feeding mechanism 12, and will not be described in detail.

[0088] It should be noted that each feeding pick-up head 17 can arbitrarily use one of pneumatic clamps, vacuum suction cups or electromagnets to pick up the corresponding parts. When the piston bowl 53 is plastic, the piston bowl pick-up head 173 should use pneumatic clamps or vacuum suction cups.

[0089] In one embodiment, if Fig.13 As shown, the riveting mechanism 2 has a stamping portion 21 that acts on the rivet 51, and the stamping portion 21 includes a main pressing head 211 and a pre-pressing head 212 movably connected below the main pressing head 211, and the bottom surface of the pre-pressing head 212 is a working surface that directly acts on the rivet 51, and an elastic member 213 is provided between the main pressing head 211 and the pre-pressing head 212.

[0090] The rivet 51, outer baffle 52, piston bowl 53, toothed spring 54, and inner baffle 55 of the piston component 5 are sequentially fed into the turntable 6 through the feeding mechanisms 1 to form a pre-assembled piston component 5 on the tooling assembly 7. When the stamping part 21 of the riveting mechanism 2 is facing the pre-assembled piston component 5 on the tooling assembly 7, the stamping part 21 will press down to rivet. The stamping part 21 includes a main pressure head 211 and a pre-pressing head 212 movably connected below the main pressure head 211. The pre-pressing head 212 contacts the rivet 51 downward to first determine the position of the stamping and has a pre-pressing effect. The stamping part 21 continues to stamp downward to complete the riveting process, and rivets the rivet 51 to the outer baffle 52, piston bowl 53, toothed spring 54, and inner baffle 55 to form the piston component 5 after riveting. An elastic member 213 is provided between the main pressure head 211 and the pre-pressure head 212 to reduce shock. The elastic member 213 is a spring or rubber.

[0091] In one embodiment, if Fig.14 As shown, the detection mechanism 3 includes: a fixedly installed detection platform 31; a lifting seat 32 slidably installed on the detection platform 31; a detection cylinder 33 installed on the detection platform 31 to drive the lifting seat 32 to move; a detection needle 34 arranged on the lifting seat 32 for contacting the rivet 51 on the detection piston component 5; and a detection circuit (not shown) connected to the detection needle 34.

[0092] The detection mechanism 3 is used to detect the riveting condition on the piston component 5. The detection mechanism 3 includes a detection platform 31, a lifting seat 32, a detection cylinder 33, a detection needle 34 and a detection circuit (not shown). The detection platform 31 is fixedly connected to the operating platform 10, the lifting seat 32 is slidably installed on the detection platform 31, and the detection cylinder 33 is fixedly installed on the detection platform 31. The lifting seat 32 reciprocates in the vertical direction under the drive of the detection cylinder 33, and the lifting seat 32 drives the detection needle 34 installed on the lifting seat 32 to move. When the piston component 5 after riveting is completed is facing the position of the detection needle 34, the detection needle 34 moves downward until it contacts the rivet 51. The detection needle 34 transmits a corresponding signal through the detection circuit (not shown), completes the detection, and then returns along the original path.

[0093] In one embodiment, if Fig.15 As shown, the unloading mechanism 4 includes: a fixedly installed unloading platform 41; a transverse shift seat 42 slidably matched with the unloading platform 41; a first cylinder 43a installed on the unloading platform 41 to drive the transverse shift seat 42; a longitudinal shift seat 44 slidably matched with the transverse shift seat 42; a second cylinder 43b installed on the transverse shift seat 42 to drive the longitudinal shift seat 44; and a unloading picking head 45 arranged on the longitudinal shift seat 44 for removing the piston component 5 from the tooling assembly 7.

[0094] It can be understood that the unloading mechanism 4 includes an unloading platform 41, a first cylinder 43a, a transverse displacement seat 42, a second cylinder 43b, a longitudinal displacement seat 44, and an unloading pickup head 45. The unloading platform 41 is fixedly mounted on the operating table 10, the first cylinder 43a is fixedly mounted on the unloading platform 41, the transverse displacement seat 42 forms a sliding fit with the unloading platform 41, the transverse displacement seat 42 is driven by the first cylinder 43a to move in the horizontal direction, the second cylinder 43b is fixedly mounted on the transverse displacement seat 42 and the longitudinal displacement seat 44 is slidably mounted, the longitudinal displacement seat 44 is driven by the second cylinder 43b to move in the vertical direction, and the unloading pickup head 45 is fixedly connected to the longitudinal displacement seat 44. During operation, the unloading pickup head 45 picks up the piston component 5 located in the tooling assembly 7 under the action of the driving force of the first cylinder 43a in the horizontal direction and the driving force of the second cylinder 43b in the vertical direction.

[0095] In one embodiment, the unloading pickup head 45 is an electromagnet, which attracts the piston component 5 to pick up the piston component 5. Specifically, the unloading pickup head 45 is rod-shaped. It can be understood that the unloading head can also be a pneumatic clamp or a vacuum suction cup.

[0096] In one of the embodiments, a support plate 441 extending in the horizontal direction is provided on the longitudinal displacement seat 44 , and the unloading pickup head 45 is fixedly connected to the support plate 441 , so that the unloading pickup head 45 can pick up the piston component 5 .

[0097] In one embodiment, the unloading mechanism 4 also includes: a discharge platform 46, which is fixedly connected to the discharge platform 41; a transfer groove 47, which is opened on the top surface of the discharge platform 46, one end of the transfer groove 47 is an entrance for receiving the piston component 5 from the discharge picking head 45, and the other end of the transfer groove 47 is an outlet for outputting the piston component 5; a pushing component 48, which is slidably installed on the discharge platform 46, and the pushing component 48 has a working state of entering the inlet end 471 of the transfer groove 47 and pushing the piston component 5 to the outlet end 472 of the transfer groove 47, and a reset state of moving out of the inlet end 471 of the transfer groove 47; a driving mechanism 49, which is installed on the discharge platform 46 and is used to drive the pushing part to switch states.

[0098] It can be understood that the discharge platform 46 is relatively fixedly connected to the discharge platform 41. The discharge platform 46 is used to receive the piston component 5 from the pickup head and move the piston component 5 out of the discharge platform 46. The top surface of the discharge platform 46 is provided with a transfer groove 47. The transfer groove 47 includes two ends, one end is an inlet end 471, which is used to receive the piston component 5 from the discharge pickup head 45, and the inlet end 471 is directly opposite to the discharge pickup head 45; the other end is an outlet end 472, which is used to output the piston component 5. A pusher component 48 is provided near the inlet end 471, which is slidably installed in cooperation with the transfer groove 47. The transfer groove 47 is equivalent to the guide rail of the pusher component 48, and the pusher component 48 reciprocates in the transfer groove 47. Among them, the initial position of the pusher component 48 is: when the pusher component 48 does not move, the pusher component 48 is close to the inlet end 471 and is located at the end of the transfer groove. The working state of the pushing component 48 is: when the pushing component 48 slides from the inlet end 471 toward the outlet end 472, it pushes the piston component 5 located in the transfer groove 47 to move toward the outlet end 472, thereby moving the piston component 5 out of the transfer groove 47; then the pushing component 48 moves in the opposite direction, moves toward the inlet end 471, moves out of the inlet end 471 of the transfer groove 47, and returns to the reset state of the initial position.

[0099] Specifically, the pusher component 48 is block-shaped. The pusher component 48 may also be plate-shaped or rod-shaped, and the shape is not limited. Further, a portion of the pusher component is located in the transfer groove, and the pusher component corresponds to the cross section of the transfer groove. Specifically, the discharge platform 46 is arranged parallel to the horizontal direction and is located between the plane of the operating platform 10 and the unloading pickup head 45.

[0100] In one of the embodiments, in order to prevent the piston components 5 arranged in sequence in the transfer groove 47 from being squeezed against each other and thus misplaced or stacked, and at the same time to facilitate manual adjustment of the misplaced or stacked piston components 5, a top cover 50 is provided on the transfer groove 47 for preventing the piston component 5 from escaping from the transfer groove. The top cover 50 semi-closes the notch of the transfer groove in the width direction of the transfer groove. When in use, the bottom surface of the top cover 50 is adjacent to the top of the piston component 5 in the transfer groove 47, thereby preventing multiple piston components 5 from escaping from the transfer groove 47 when pressed against each other.

[0101] The movement process of the unloading mechanism 4 is as follows: (1) Picking up the piston component 5: When the unloading picking part does not pick up the piston component 5, it faces the inlet end 471 of the transfer groove 47, and the first cylinder 43a drives the lateral displacement seat 42 to move in the horizontal direction toward the tooling assembly 7 on the turntable 6. When the unloading picking part faces the piston component 5 on the tooling assembly 7, the second cylinder 43b drives the longitudinal displacement seat 44 to move in the vertical direction toward the tooling assembly 7 until the unloading picking part picks up the active piston component 5. When the piston component 5 is inserted into the transfer groove 47, the second cylinder 43b drives the longitudinal seat 44 to move in the vertical direction away from the tooling assembly 7, and the unloading pick-up unit returns to the original path; (2) The piston component 5 is placed in the unloading platform 46: When the unloading pick-up unit with the piston component 5 is facing the inlet end 471 of the transfer groove 47, the second cylinder 43b drives the longitudinal seat 44 to move in the vertical direction toward the inlet end 471 of the transfer groove 47, and the unloading pick-up unit places the piston component 5 in the inlet end 471 of the transfer groove. (3) The piston component 5 moves out of the transfer groove 47: The pushing component 48 enters the inlet end 471 of the transfer groove 47 from the initial position and pushes the piston component 5 toward the outlet end 472 of the transfer groove 47, and the piston component 5 moves out of the transfer groove 47.

[0102] Correspondingly, the method for automatically riveting the piston component 5 using the riveting equipment of the four-way reversing valve piston component 5 provided in this embodiment includes the steps of feeding-riveting-detection-unloading, specifically: (1) feeding: feeding the rivet 51, the outer baffle plate 52, the piston bowl 53, the toothed spring 54, and the inner baffle plate 55 into the tooling assembly 7 corresponding to the upper surface of the turntable 6 in sequence to form a preassembled piston component 5; (2) riveting: riveting the preassembled piston component 5 in the tooling assembly 7; (3) detecting: detecting the piston component 5 after riveting; (4) unloading: removing the piston component 5 after detection from the tooling assembly 7.

[0103] The riveting equipment and automatic riveting method of the piston component 5 of the four-way reversing valve provided in the embodiment of the present invention, through the principles of visual system and rotary divider positioning, automatic loading and unloading, PLC intelligent control, etc., the rivets 51, piston bowl 53, outer baffle 52, toothed spring and inner baffle 55 of the piston component 5 in the four-way reversing valve are fully automatically assembled, riveted and tested, so that the piston component 5 can be quickly formed and assembled, wherein the rotary divider controls the entire turntable 6 and various mechanisms to prepare for assembly. The riveting equipment of the piston component 5 of the four-way reversing valve is used to automatically rivet the piston component 5, and the time of the entire processing process of the piston component 5 from each part to riveting completion and unloading is reduced to 3 seconds, the processing efficiency is improved, and the depth deviation of the riveting is small, and the product precision is high.

[0104] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A riveting device for a piston component of a four-way reversing valve, comprising: A turntable and a driving device for driving the turntable to rotate, wherein the upper surface of the turntable has multiple sets of tooling components distributed circumferentially, characterized in that it also includes: A feeding mechanism for feeding the piston component into the corresponding tooling assembly; A riveting mechanism for riveting piston components within a tooling assembly; Inspection mechanism for inspecting piston parts after riveting; The unloading mechanism of the tooling assembly is used to remove the piston component after the inspection is completed; The piston component in the tooling assembly includes an outer baffle, a piston bowl, a toothed spring and an inner baffle stacked in sequence from bottom to top, each part is provided with a rivet hole corresponding to the position and pierced with a rivet, the riveting mechanism has a stamping part acting on the rivet, the stamping part includes a main pressure head and a pre-pressing head movably connected below the main pressure head, the bottom surface of the pre-pressing head is a working surface directly acting on the rivet, and an elastic member is provided between the main pressure head and the pre-pressing head.

2. The riveting device for the piston component of a four-way reversing valve according to claim 1, characterized in that: The feeding mechanism includes a rivet feeding mechanism, an outer baffle feeding mechanism, a piston bowl feeding mechanism, a toothed spring feeding mechanism, and an inner baffle feeding mechanism, which are arranged along the rotation direction of the turntable and are used to feed the corresponding parts into the tooling assembly for preassembly into a piston component. The tooling assembly comprises a tooling base fixed on the turntable, a piston component accommodating groove is arranged on the tooling base, and a rivet positioning hole is arranged at the groove bottom of the piston component accommodating groove.

3. The riveting device for the piston component of a four-way reversing valve according to claim 2, characterized in that: The rivet feeding mechanism, the outer baffle feeding mechanism, the piston bowl feeding mechanism, the toothed spring feeding mechanism, and the inner baffle feeding mechanism respectively include: Screening drum used to hold and transport corresponding parts; Pick up corresponding parts from the output end of the screening drum and transfer them to the feeding and picking head on the tooling assembly; A mechanical arm that supports and drives the feeding and picking head to move.

4. The riveting device for the piston component of a four-way reversing valve according to claim 2, characterized in that: The detection mechanism includes: Fixed installation test bench; A lifting seat slidably mounted on the detection platform; A detection cylinder installed on the detection platform to drive the lifting seat to move; A detection needle disposed on the lifting seat for contacting and detecting a rivet on the piston component; and a detection circuit connected to the detection needle.

5. The riveting device for the piston component of a four-way reversing valve according to claim 3, characterized in that: The unloading mechanism comprises: Fixed mounted unloading platform; A transverse seat slidably matched with the unloading platform; A first cylinder installed on the unloading platform to drive the transverse shift seat; A longitudinal movement seat slidably matched with the transverse movement seat; A second cylinder mounted on the transverse shift seat and driving the longitudinal shift seat; A discharging and picking head is arranged on the longitudinal shift seat and is used for removing the piston component from the tooling assembly.

6. The riveting device for the piston component of a four-way reversing valve according to claim 5, characterized in that: The unloading mechanism also includes: A discharging platform, fixedly connected to the unloading platform; A transfer groove is provided on the top surface of the discharge platform, one end of the transfer groove is an inlet for receiving the piston component from the discharge pickup head, and the other end of the transfer groove is an outlet for outputting the piston component; A material pushing component is slidably mounted on the material discharging platform, and the material pushing component has a working state of entering the transfer groove inlet and pushing the piston component toward the transfer groove outlet, and a reset state of moving out of the transfer groove inlet; A driving mechanism is installed on the discharging platform and is used to drive the pushing part to switch states.

7. The riveting device for the piston component of a four-way reversing valve according to claim 5, characterized in that: The unloading pick-up head and the feeding pick-up head are respectively electromagnets, pneumatic grippers or vacuum suction cups.

8. An automatic riveting method for a four-way reversing valve piston component, characterized in that: The following steps are implemented using the riveting device for the piston component of the four-way reversing valve according to any one of claims 1 to 7: (1) Feeding: Feeding the rivet, outer baffle, piston bowl, toothed spring, and inner baffle into the corresponding tooling assembly on the upper surface of the turntable in sequence to form a pre-assembled piston component; (2) Riveting: Riveting the pre-assembled piston parts in the tooling assembly; (3) Inspection: inspect the piston parts after riveting; (4) Unloading: Remove the riveted piston components from the tooling assembly.

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