A deburring detection machine applied to an elongated valve stem and a detection method thereof

Abstract

A deburring detection machine applied to an elongated valve rod and a detection method thereof, comprising an electric control device, a valve rod feeding mechanism, a material moving mechanism, and a valve rod starting mechanism, a valve rod direction detection mechanism, a valve rod rotating mechanism, a deburring mechanism, a valve rod length detection mechanism, an unqualified product discharging mechanism, and a qualified product discharging mechanism arranged in sequence beside a fixed support according to procedures. The present application largely adopts automatic machinery to realize the functions of automatic feeding, rotation, deburring and detection of the precise and easy-to-damage elongated valve rod, reduces the operation site, saves a large amount of labor and production cost, greatly improves the productivity, and effectively improves the consistency and qualified rate of the product.

Description

Technical Field

[0001] This invention relates to the field of valve stem production and inspection, and in particular to a deburring inspection machine and inspection method for slender valve stems. Background Technology

[0002] The valve stem is a crucial component of a valve, used for transmission. It connects to the actuator or handle at the top and directly drives the valve core to move or rotate, thus achieving the valve's opening, closing, or regulating function. During valve opening and closing, the valve stem is not only a moving and load-bearing component but also a sealing element. Simultaneously, it is subjected to the impact and corrosion of the medium and also experiences friction with the packing. Therefore, when selecting valve stem materials, it is essential to ensure that they possess sufficient strength, good impact toughness, scratch resistance, and corrosion resistance at the specified temperature. As a wear part, the valve stem's machinability and heat treatment properties should also be considered when selecting materials.

[0003] The valve stem, made of alloy material, first needs to be cut into the required length during the processing, and then the valve stem is milled to produce the required surface shape.

[0004] In this field, the detection technology is described in patent document CN218191104U, which discloses a valve stem detection machine, including a tray loading / unloading assembly, a detection mechanism, a transfer mechanism, a loading mechanism, and a unloading mechanism. The tray loading / unloading assembly is used to transport the tray to the loading position of the loading mechanism or the unloading position of the unloading mechanism. The loading mechanism is used to transfer the valve stem from the tray to the transfer mechanism. The transfer mechanism is used to move the valve stem to the detection mechanism. The unloading mechanism is used to transfer the detected valve stem to the tray loading / unloading assembly or the NG (Not From Good) hopper. The beneficial effects of this invention are: the transfer mechanism, in conjunction with the tray loading / unloading assembly and the loading mechanism, can quickly transport the valve stem to be detected to the detection station for detection, thus accelerating the detection efficiency of the valve stem. After detection, the valve stem can be promptly transported to the NG hopper or the tray loading / unloading assembly, achieving rapid detection of the valve stem.

[0005] The inspection machine provided in the aforementioned patent technology does not disclose sufficient details and cannot achieve functions such as deburring and inspection. Specifically: 1. The description states that "the inspection station is equipped with a second inspection device for inspecting burrs and / or lengths on the valve stem," but the specific composition and working method of the second inspection device are not disclosed. Those skilled in the art cannot achieve the described functions based on the description and drawings; 2. Similarly, the first and third inspection devices are not fully disclosed and cannot achieve the corresponding functions; 3. The entire movement of the valve stem requires a robotic arm, and only one valve stem can be moved at a time, thus greatly reducing the efficiency of movement and inspection; 4. Because the entire process uses a robotic arm for loading and unloading, the valve stem is subjected to greater force and is clamped for a longer time. In particular, the relatively light and slender valve stem is prone to deformation and damage, resulting in a large number of defective products. Summary of the Invention

[0006] To overcome the above-mentioned shortcomings of the prior art, the present invention provides a deburring inspection machine and its inspection method for slender valve stems.

[0007] The technical solution of this invention to solve its technical problem is: a deburring inspection machine applied to slender valve stems, comprising:

[0008] Electrical control devices;

[0009] The valve stem feeding mechanism includes an inverted cone hopper that is larger at the top and smaller at the bottom, a material conveying device located below the inverted cone hopper, and a stepping switch device. A discharge port is provided below the inverted cone hopper, and the stepping switch device is located at the discharge port so that the discharge port can continuously switch between a closed state and an open state.

[0010] The material transfer mechanism includes a fixed support and a movable support, several first fork-shaped material placement fixtures set on the fixed support, several second fork-shaped material placement fixtures set on the movable support, and a stepping drive device acting on the movable support.

[0011] And arranged in sequence next to the fixed bracket are the valve stem starting mechanism, valve stem direction detection mechanism, valve stem rotation mechanism, deburring mechanism, valve stem length detection mechanism, non-conforming product unloading mechanism, and conforming product unloading mechanism;

[0012] The valve stem length detection mechanism includes a first visual detection device and a second visual detection device, a first positioning push plate device and a second positioning push plate device, which are respectively connected to the electronic control device. The first positioning push plate device is located on the left side of the fixed bracket, and the second positioning push plate device is located on the right side of the fixed bracket. The first visual detection device faces the left side of the fixed bracket, and the second visual detection device faces the right side of the fixed bracket.

[0013] A further configuration of the above technical solution is that both the first visual inspection device and the second visual inspection device include a light source adjustment background plate located directly below the fixed bracket, a light sensor located on the light source adjustment background plate, and a camera assembly located directly above the fixed bracket.

[0014] A further configuration of the above technical solution is that the first positioning push plate device and the second positioning push plate device both include a transverse pushing cylinder, a push plate body driven by the transverse pushing cylinder, and a plurality of positioning push blocks detachably connected to the push plate body. The spacing between adjacent positioning push blocks is the same as the spacing between adjacent first fork-shaped material placement fixtures.

[0015] A further configuration of the above technical solution is that the valve stem starting mechanism includes a starting bracket, a material placement plate disposed on the starting bracket, and a groove formed on the material placement plate for accommodating a slender valve stem. The material placement plate is also provided with a channel groove, and the movable bracket can at least partially enter the channel groove.

[0016] A further provision of the above technical solution is that the valve stem direction detection mechanism is a direction detection camera assembly located directly above the fixed bracket;

[0017] The valve stem rotation mechanism includes a rotating mounting bracket, a lifting cylinder mounted on the rotating mounting bracket, a rotating cylinder driven by the lifting cylinder, and a first pneumatic gripper connected to the rotating cylinder.

[0018] A further configuration of the above technical solution is that the deburring mechanism includes a deburring mounting bracket, a forward-pushing cylinder arranged horizontally on the deburring mounting bracket, a rotary motor acted upon by the forward-pushing cylinder, two contact heads arranged at the end of the rotary motor, and a second pneumatic gripper for fixing a slender valve stem. A working gap for inserting the slender valve stem is formed between the two contact heads, and the contact heads can abut against the slender valve stem.

[0019] A further configuration of the above technical solution is that the defective product unloading mechanism includes a defective product unloading channel set on either side of the fixed bracket, an unloading mounting bracket spanning the defective product unloading channel, an unloading ejection cylinder set on the unloading mounting bracket, and a third pneumatic gripper acted upon by the unloading ejection cylinder.

[0020] A further configuration of the above technical solution is that the qualified product unloading mechanism includes a qualified product unloading channel connected to the end of the fixed support and an unloading fixture disposed at the end of the fixed support. The unloading fixture is located directly above the qualified product unloading channel, and the unloading fixture has an inclined unloading guide opening on the side near the qualified product unloading channel.

[0021] A further configuration of the above technical solution is that the stepper switch device includes a stepper drive motor, a rotating shaft driven by the stepper drive motor and located at the feed port, a fixed guide block located next to the feed port, and a cam-shaped switch block sleeved on the rotating shaft, wherein the fixed guide block and the cam-shaped switch block are arranged alternately.

[0022] The stepping drive device includes a translational push-pull cylinder, a stepping mounting base plate driven by the translational push-pull cylinder, several lifting cylinders fixed on the mounting base plate, and a lifting plate acted upon by the lifting cylinders. The movable bracket is fixed on the lifting plate.

[0023] This invention also provides a method for detecting slender valve stems, applicable to the aforementioned deburring inspection machine used for slender valve stems, comprising:

[0024] Step 1: Place a large number of slender valve stems into the inverted cone hopper, activate the stepping switch to make the slender valve stems intermittently pass through the discharge port and fall into the conveying device, and activate the conveying device to transport the slender valve stems to the valve stem starting mechanism.

[0025] Step 2: Start the stepping drive device to make the movable support move in a stepping reciprocating motion relative to the fixed support. In each reciprocating motion cycle, the second fork-shaped material placement fixture will pick up the slender valve rod on the first fork-shaped material placement fixture and move the slender valve rod from the previous first fork-shaped material placement fixture to the next first fork-shaped material placement fixture.

[0026] Step 3: The valve stem direction detection mechanism detects the direction of the slender valve stem on the corresponding first fork-shaped feeding fixture and feeds the detection information back to the electronic control device.

[0027] Step 4: Based on the direction detection results, if the direction is correct, the valve stem rotation mechanism will not work; if the direction is incorrect, the valve stem rotation mechanism will be activated to grab the slender valve stem on the corresponding first fork-shaped material placement fixture, change its direction, and then put it back on the corresponding first fork-shaped material placement fixture.

[0028] Step 5: Activate the deburring mechanism to deburr and polish the slender valve rod on the corresponding first fork-shaped material feeding fixture.

[0029] Step Six: Activate the valve stem length detection mechanism. The second positioning push plate device first activates to push the slender valve stem on the corresponding first fork-shaped material placement fixture from right to left. Then, the first vision detection device performs visual detection on the left side of the slender valve stem on the corresponding first fork-shaped material placement fixture and feeds the detection information back to the electronic control device. Then, the second positioning push plate device retracts, and the first positioning push plate device first activates to push the slender valve stem on the corresponding first fork-shaped material placement fixture from left to right. Then, the second vision detection device performs visual detection on the right side of the slender valve stem on the corresponding first fork-shaped material placement fixture and feeds the detection information back to the electronic control device.

[0030] Step 7: Based on the visual inspection feedback from Step 6, if the length detection result is unqualified, the unqualified product unloading mechanism is activated to remove the unqualified slender valve stem; if the length detection structure is qualified, the slender valve stem is unloaded through the qualified product unloading mechanism.

[0031] The beneficial effects of this invention are as follows: It provides a deburring and inspection machine and its inspection method for slender valve stems. It adopts a large amount of automated machinery to realize the functions of automatic feeding, rotation, deburring and inspection of precision and fragile slender valve stems, reducing the work site, saving a lot of labor and production costs, greatly improving productivity, and effectively improving the consistency and pass rate of products. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall assembly of the present invention.

[0033] Figure 2 This is a schematic diagram of the overall assembly from another perspective of the present invention.

[0034] Figure 3 This is a schematic diagram of the structural distribution of the present invention.

[0035] Figure 4 This is a schematic diagram of the valve stem feeding mechanism.

[0036] Figure 5 This is a structural diagram of the rotating shaft, fixed guide block, and cam-shaped switch block.

[0037] Figure 6 This is a schematic diagram showing the separation of fixed and movable supports.

[0038] Figure 7 This is an assembly diagram of the fixed bracket and the movable bracket.

[0039] Figure 8 This is a schematic diagram of the valve stem direction detection mechanism.

[0040] Figure 9 This is a schematic diagram of the valve stem rotation mechanism.

[0041] Figure 10 This is a schematic diagram of the deburring mechanism.

[0042] Figure 11 This is a schematic diagram of the valve stem length detection mechanism.

[0043] Figure 12 This is a schematic diagram of the first vision detection device.

[0044] Figure 13 This is a schematic diagram of the second positioning push plate device.

[0045] Figure 14 This is a schematic diagram of the unqualified product unloading mechanism and the qualified product unloading mechanism.

[0046] In the diagram: 1. Valve stem feeding mechanism; 101. Inverted cone hopper; 102. Material conveying device; 103. Discharge port; 104. Stepper drive motor; 105. Rotary shaft; 106. Fixed guide block; 107. Cam-shaped switch block; 2. Material transfer mechanism; 201. Fixed bracket; 202. Movable bracket; 203. First fork-shaped material placement fixture; 204. Second fork-shaped material placement fixture; 205. Translational push-pull cylinder; 206. Stepping mounting base plate; 207. Lifting cylinder; 208. Lifting plate; 3. Valve stem starting mechanism; 301. Starting bracket; 302. Material placement plate; 303. Groove; 304. Channel groove; 4. Valve stem direction detection mechanism; 401. Direction detection camera assembly; 5. Valve stem rotation mechanism; 501. Rotating mounting bracket; 502. Lifting cylinder; 503. Rotating cylinder; 504. First pneumatic gripper; 6. To 601. Deburring mechanism; 602. Deburring mounting bracket; 603. Front push cylinder; 604. Rotary motor; 605. Contact head; 606. Second pneumatic gripper; 607. Working clearance; 7. Valve stem length detection mechanism; 701. First vision inspection device; 702. Second vision inspection device; 703. First positioning push plate device; 704. Second positioning push plate device; 705. Light source adjustment background plate; 706. Light sensor detector; 707. Camera assembly; 708. Lateral push cylinder; 709. Push plate body; 710. Positioning push block; 8. Defective product unloading mechanism; 801. Defective product unloading channel; 802. Unloading mounting bracket; 803. Unloading ejection cylinder; 804. Third pneumatic gripper; 9. Qualified product unloading mechanism; 901. Qualified product unloading channel; 902. Unloading fixture; 903. Unloading guide opening; 10. Slender valve stem. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1

[0049] Reference Figures 1 to 14 A deburring inspection machine for use on slender valve stems 10, comprising:

[0050] Electrical control devices;

[0051] The valve stem feeding mechanism 1 includes an inverted cone hopper 101 that is larger at the top and smaller at the bottom, a conveying device 102 located below the inverted cone hopper 101, and a stepping switch device. A discharge port 103 is provided below the inverted cone hopper 101, and the stepping switch device is located at the discharge port 103 so that the discharge port 103 continuously switches between a closed state and an open state.

[0052] The material transfer mechanism 2 includes a fixed support 201 and a movable support 202, a plurality of first fork-shaped material placement fixtures 203 disposed on the fixed support 201, a plurality of second fork-shaped material placement fixtures 204 disposed on the movable support 202, and a stepping drive device acting on the movable support 202.

[0053] And the valve stem starting mechanism 3, valve stem direction detection mechanism 4, valve stem rotation mechanism 5, deburring mechanism 6, valve stem length detection mechanism 7, non-conforming product unloading mechanism 8, and conforming product unloading mechanism 9 are arranged in sequence next to the fixed bracket 201 according to the process.

[0054] The valve stem length detection mechanism 7 includes a first visual detection device 701 and a second visual detection device 702, a first positioning push plate device 703 and a second positioning push plate device 704, which are respectively connected to the electronic control device. The first positioning push plate device 703 is located on the left side of the fixed bracket 201, and the second positioning push plate device 704 is located on the right side of the fixed bracket 201. The first visual detection device 701 faces the left side of the fixed bracket 201, and the second visual detection device 702 faces the right side of the fixed bracket 201.

[0055] The above content constitutes the basic solution of this invention, and the corresponding detection method is as follows:

[0056] Step 1: Place a large number of slender valve stems 10 into the inverted cone hopper 101, activate the stepping switch device to make the slender valve stems 10 intermittently pass through the discharge port 103 and fall into the conveying device 102, and activate the conveying device 102 to transport the slender valve stems 10 to the valve stem starting mechanism 3.

[0057] Step 2: Start the stepping drive device to make the movable support 202 reciprocate in a stepping manner relative to the fixed support 201. In each reciprocating cycle, the second fork-shaped material placement fixture 204 will pick up the slender valve rod 10 on the first fork-shaped material placement fixture 203 and move the slender valve rod 10 from the previous first fork-shaped material placement fixture 203 to the next first fork-shaped material placement fixture 203.

[0058] Step 3: The valve stem direction detection mechanism 4 performs direction detection on the slender valve stem 10 on the corresponding first fork-shaped material placement fixture 203 and feeds the detection information back to the electronic control device.

[0059] Step 4: According to the direction detection result, if the direction is correct, the valve stem rotation mechanism 5 will not work; if the direction is incorrect, the valve stem rotation mechanism 5 will be activated to grab the slender valve stem 10 on the corresponding first fork-shaped material placement fixture 203, change its direction, and then put it back on the corresponding first fork-shaped material placement fixture 203.

[0060] Step 5: Start the deburring mechanism 6 to deburr and polish the slender valve rod 10 on the corresponding first fork-shaped material placement fixture 203.

[0061] Step 6: Activate the valve stem length detection mechanism 7. The second positioning push plate device 704 first activates to push the slender valve stem 10 on the corresponding first fork-shaped material placement fixture 203 from right to left. Then, the first vision detection device 701 performs visual detection on the left side of the slender valve stem 10 on the corresponding first fork-shaped material placement fixture 203 and feeds back the detection information to the electronic control device. Then, the second positioning push plate device 704 retracts, and the first positioning push plate device 703 first activates to push the slender valve stem 10 on the corresponding first fork-shaped material placement fixture 203 from left to right. Then, the second vision detection device 702 performs visual detection on the right side of the slender valve stem 10 on the corresponding first fork-shaped material placement fixture 203 and feeds back the detection information to the electronic control device.

[0062] Step 7: Based on the visual inspection feedback from Step 6, if the length detection result is unqualified, the unqualified product unloading mechanism 8 is activated to remove the unqualified slender valve stem 10; if the length detection structure is qualified, the slender valve stem 10 is unloaded through the qualified product unloading mechanism 9.

[0063] Example 2

[0064] Based on Embodiment 1, this embodiment provides a preferred structural scheme for the first visual detection device 701 and the second visual detection device 702, specifically as follows: (Refer to...) Figures 11-13 Both include a light source adjustment background plate 705 located directly below the fixed bracket 201, a light sensor 706 located on the light source adjustment background plate 705, and a camera assembly 707 located directly above the fixed bracket 201. Using the structure of this embodiment, during use, the color and light brightness can be adjusted according to the actual working environment via the light source adjustment background plate 705, making the slender valve rod 10 appear clearer against the backdrop of the light source adjustment background plate 705. The light sensor 706 can be a device similar to an infrared sensor, its main function being to detect whether the slender valve rod 10 is placed at the corresponding location. If the slender valve rod 10 is detected, feedback is provided and the camera assembly 707 and the light source adjustment background plate 705 begin detection; if the slender valve rod 10 is not detected, feedback is provided and the operation of the camera assembly 707 and the light source adjustment background plate 705 is stopped, effectively preventing the occurrence of no-load operation.

[0065] A further configuration of the above technical solution is that both the first positioning push plate device 703 and the second positioning push plate device 704 include a transverse pushing cylinder 708, a push plate body 709 driven by the transverse pushing cylinder 708, and a plurality of positioning push blocks 710 detachably connected to the push plate body 709. The spacing between adjacent positioning push blocks 710 is the same as the spacing between adjacent first fork-shaped material placement fixtures 203. Different sizes of positioning push blocks 710 can be replaced on the push plate body 709 to meet the dimensional detection requirements of slender valve stems 10 of different sizes.

[0066] The mechanism for determining whether the length of the slender valve stem 10 is qualified in this embodiment is as follows: 1. If both the first visual inspection device 701 and the second visual inspection device 702 detect the slender valve stem 10, the result is output that the valve stem size is too long; if only one of the first visual inspection device 701 and the second visual inspection device 702 detects the slender valve stem 10, the result is output that the valve stem size is qualified; if neither the first visual inspection device 701 nor the second visual inspection device 702 detects the slender valve stem 10, the result is output that the valve stem size is too short.

[0067] Example 3

[0068] Based on Embodiment 1, this embodiment provides a preferred structural scheme for the valve stem initiation mechanism 3, specifically as follows: (Refer to...) Figures 4-5It includes a starting support 301, a material placement plate 302 disposed on the starting support 301, and a groove 303 formed on the material placement plate 302 for accommodating the slender valve stem 10. The material placement plate 302 is also provided with a channel groove 304, and the movable support 202 can at least partially enter the channel groove 304. In use, when the movable support 202 enters the channel groove 304, the second fork-shaped feeding fixture 204 is located directly below the slender valve stem 10 in the groove 303. Driven by the transfer mechanism 2, the movable support 202 is raised as a whole and the second fork-shaped feeding fixture 204 lifts the slender valve stem 10. Then it moves forward so that the slender valve stem 10 leaves the starting mechanism. Then it moves to the position opposite to the first fork-shaped feeding fixture 203 on the fixed support 201. Driven by the transfer mechanism 2, the movable support 202 falls as a whole so that the slender valve stem 10 moves from the second fork-shaped feeding fixture 204 to the first fork-shaped feeding fixture 203. This realizes the transition function of the slender valve stem 10 moving from the valve stem feeding mechanism 1 to the first fork-shaped feeding fixture 203 on the fixed support 201.

[0069] Example 4

[0070] Based on Embodiment 1, this embodiment provides a preferred structural scheme for the valve stem direction detection mechanism 4, specifically as follows: (Refer to...) Figure 8 The valve stem direction detection mechanism 4 is a direction detection camera assembly 707401 located directly above the fixed bracket 201; see reference. Figure 9 The valve stem rotation mechanism 5 includes a rotating mounting bracket 501, a lifting cylinder 502 mounted on the rotating mounting bracket 501, a rotating cylinder 503 driven by the lifting cylinder 502, and a first pneumatic gripper 504 connected to the rotating cylinder 503.

[0071] In the previous cycle, when the orientation detection camera component 707401 detects that the slender valve rod 10 is in the wrong orientation, in the next cycle, the lifting cylinder 502 is activated to drive the first pneumatic gripper 504 to move down. Then, the first pneumatic gripper 504 clamps the slender valve rod 10 in the wrong orientation. The lifting cylinder 502 drives the first pneumatic gripper 504 and the slender valve rod 10 to move up together to eliminate interference. Then, the rotary cylinder 503 is activated and rotates 180 degrees so that the slender valve rod 10 can be adjusted to the correct position. The lifting cylinder 502 drives the first pneumatic gripper 504 and the slender valve rod 10 to move down together. The first pneumatic gripper 504 releases so that the slender valve rod 10 in the correct orientation falls onto the first fork-shaped material placement fixture 203.

[0072] Example 5

[0073] Based on Embodiment 1, this embodiment provides a preferred structural scheme for the deburring mechanism 6, specifically as follows: (Refer to...) Figure 10 The deburring mechanism 6 includes a deburring mounting bracket 601, a forward-pushing cylinder 602 horizontally mounted on the deburring mounting bracket 601, a rotary motor 603 acted upon by the forward-pushing cylinder 602, two contact heads 604 mounted at the end of the rotary motor 603, and a second pneumatic gripper 605 for fixing the slender valve stem 10. A working gap 606 for inserting the slender valve stem 10 is formed between the two contact heads 604, and the contact heads 604 can abut against the slender valve stem 10.

[0074] The deburring mechanism 6 provided in this embodiment works as follows: The forward-pushing cylinder 602 pushes out the rotary motor 603, causing the two contact heads 604 to contact the slender valve stem 10 on the corresponding first fork-shaped material placement fixture 203. Simultaneously, the second pneumatic gripper 605 activates to clamp the slender valve stem 10 on the first fork-shaped material placement fixture 203 to prevent movement. Then, the rotary motor 603 is activated, causing the two contact heads 604 to rotate continuously, performing deburring and polishing operations on the slender valve stem 10. The contact heads 604 can be sponge heads, abrasive heads, etc.

[0075] Example 6

[0076] Based on Embodiment 1, this embodiment provides a preferred structural scheme for the non-conforming product unloading mechanism 8, specifically as follows: (Refer to...) Figure 14 The defective product unloading mechanism 8 includes a defective product unloading channel 801 set on any side of the fixed bracket 201, an unloading mounting bracket 802 spanning the defective product unloading channel 801, an unloading ejection cylinder 803 set on the unloading mounting bracket 802, and a third pneumatic gripper 804 acted upon by the unloading ejection cylinder 803.

[0077] If the slender valve stem 10 detected by the valve stem length detection mechanism 7 is a qualified product, the unqualified product unloading mechanism 8 will not be activated; if the slender valve stem 10 detected by the valve stem length detection mechanism 7 is an unqualified product, the unloading and pushing cylinder 803 is activated to push the third pneumatic gripper 804 forward. Then the third starting gripper grabs the slender valve stem 10 on the corresponding first fork-shaped placement fixture 203. Then the unloading and pushing cylinder 803 retracts with the third pneumatic gripper 804 and the slender valve stem 10, the third starting gripper releases, and the unqualified slender valve stem 10 automatically falls into the defective product unloading channel 801.

[0078] Example 7

[0079] Based on Embodiment 1, this embodiment provides a preferred structural scheme for the qualified product unloading mechanism 9, specifically as follows: (Refer to...) Figure 14 It includes a qualified product unloading channel 901 connected to the end of the fixed bracket 201, and an unloading fixture 902 set at the end of the fixed bracket 201. The unloading fixture 902 is located directly above the qualified product unloading channel 901, and the unloading fixture 902 has an inclined unloading guide opening 903 on the side near the qualified product unloading channel 901.

[0080] Under the action of the stepping drive device, the second fork-shaped feeding fixture 204 moves the slender valve rod 10 to the unloading fixture 902 at the end of the fixed bracket 201. With the help of the inclined unloading guide opening 903 on the unloading fixture 902, it can automatically fall into the qualified product unloading channel 901 under the action of gravity, thus completing the qualified product unloading action.

[0081] Example 8

[0082] Based on Embodiment 1, this embodiment provides a preferred structural scheme for a stepping switch device, specifically as follows: (Refer to...) Figures 4-5 The stepper switch device includes a stepper drive motor 104, a rotating shaft 105 driven by the stepper drive motor 104 and located at the feed port 103, a fixed guide block 106 located next to the feed port 103, and a cam-shaped switch block 107 sleeved on the rotating shaft 105. The fixed guide block 106 and the cam-shaped switch block 107 are arranged alternately. Due to the shape characteristics of the cam-shaped switch block 107, when the protruding part of the cam-shaped switch block 107 enters the feed port 103, it can block the feed port 103 to restrict the slender valve rod 10 from falling; when the concave part of the cam-shaped switch block 107 enters the feed port 103, the cam-shaped switch block 107 is offset from the feed port 103, so the slender valve rod 10 can smoothly pass through the feed port 103 and fall into the conveying device 102.

[0083] On the other hand, refer to Figures 6-7The stepping drive device includes a translational push-pull cylinder 205, a stepping mounting base plate 206 driven by the translational push-pull cylinder 205, several lifting cylinders 207 fixed on the mounting base plate, and a support plate 208 acted upon by the lifting cylinders 207. The movable bracket 202 is fixed on the support plate 208. The translational push-pull cylinder 205 can drive the stepping mounting base plate 206 to move forward and backward, and the lifting cylinders 207 can drive the support plate 208 to rise and fall. With the coordinated operation of the translational push-pull cylinder 205 and the lifting cylinders 207, the movable bracket 202 can achieve a four-step repetitive motion effect of rising, moving forward, falling, and moving backward. When rising, the second fork-shaped material placement fixture 204 lifts the slender valve rod 10 from the next-stage first fork-shaped material placement fixture 203; when moving forward, the second fork-shaped material placement fixture 204 moves the slender valve rod 10 from the corresponding position of the next-stage first fork-shaped material placement fixture 203 to the corresponding position of the previous-stage first fork-shaped material placement fixture 203; when falling, the second fork-shaped material placement fixture 204 transfers the slender valve rod 10 to the previous-stage first fork-shaped material placement fixture 203; when retracting, the second fork-shaped material placement fixture 204 resets to its initial position.

[0084] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the invention shall still fall within the protection scope of the present invention.

Claims

1. A deburring inspection machine for application to an elongate valve stem, characterised in that, The utility model relates to a valve stem production line, which comprises: an electric control device; a valve stem feeding mechanism (1) comprising an inverted cone hopper (101) with a large upper part and a small lower part, a material conveying device (102) below the inverted cone hopper (101), and a stepping switch device arranged at a discharge port (103) of the inverted cone hopper (101) to switch the discharge port (103) between a closed state and an open state; a material moving mechanism (2) comprising a fixed support (201), a movable support (202), a plurality of first fork-shaped material placing tools (203) arranged on the fixed support (201), a plurality of second fork-shaped material placing tools (204) arranged on the movable support (202), and a stepping driving device acting on the movable support (202); and a valve stem starting mechanism (3), a valve stem direction detecting mechanism (4), a valve stem rotating mechanism (5), a deburring mechanism (6), a valve stem length detecting mechanism (7), an unqualified product discharging mechanism (8), and a qualified product discharging mechanism (9) arranged in sequence beside the fixed support (201) according to the working procedure; wherein the valve stem length detecting mechanism (7) comprises a first visual detecting device (701) and a second visual detecting device (702) in communication connection with the electric control device, a first positioning push plate device (703) and a second positioning push plate device (704), the first positioning push plate device (703) is arranged on the left side of the fixed support (201), the second positioning push plate device (704) is arranged on the right side of the fixed support (201), the first visual detecting device (701) faces the left side of the fixed support (201), and the second visual detecting device (702) faces the right side of the fixed support (201); the first visual detecting device (701) performs left-side visual detection on the elongated valve stem (10) on the corresponding first fork-shaped material placing tool (203) and feeds back the detection information to the electric control device, and the second visual detecting device (702) performs right-side visual detection on the elongated valve stem (10) on the corresponding first fork-shaped material placing tool (203) and feeds back the detection information to the electric control device; if the first visual detecting device (701) and the second visual detecting device (702) both detect the elongated valve stem (10), the electric control device outputs a result that the valve stem size is too long; if only one of the first visual detecting device (701) and the second visual detecting device (702) detects the elongated valve stem (10), the electric control device outputs a result that the valve stem size is qualified; and if neither of the first visual detecting device (701) and the second visual detecting device (702) detects the elongated valve stem (10), the electric control device outputs a result that the valve stem size is too short.

2. A deburring inspection machine for elongate valve stems as claimed in claim 1 wherein: The first visual detection device (701) and the second visual detection device (702) each include a light source adjusting background plate (705) located directly below the fixed support (201), a light sensing detector (706) located on the light source adjusting background plate (705), and a camera assembly (707) located directly above the fixed support (201).

3. A deburring inspection machine for elongate valve stems as claimed in claim 1 wherein: The first positioning push plate device (703) and the second positioning push plate device (704) each include a horizontal push cylinder (708), a push plate body (709) driven by the horizontal push cylinder (708), and a plurality of positioning push blocks (710) detachably connected to the push plate body (709), the spacing between adjacent positioning push blocks (710) being the same as the spacing between adjacent first fork-shaped material placing tools (203).

4. A deburring inspection machine for elongated valve stems as defined in claim 1 wherein: The valve stem starting mechanism (3) includes a starting support (301), a material placing plate (302) provided on the starting support (301), and a groove (303) opened on the material placing plate (302) for accommodating an elongated valve stem (10), and a channel groove (304) is also opened on the material placing plate (302), and the movable support (202) can at least partially enter the channel groove (304).

5. A deburring inspection machine for elongated valve stems as defined in claim 1 wherein: The valve stem direction detection mechanism (4) is a direction detection camera assembly (707) (401) provided directly above the fixed support (201). The valve stem rotating mechanism (5) includes a rotating installation support (501), a lifting cylinder (502) provided on the rotating installation support (501), a rotating cylinder (503) driven by the lifting cylinder (502), and a first pneumatic clamp jaw (504) connected to the rotating cylinder (503).

6. A deburring inspection machine for elongated valve stems as defined in claim 1 wherein: The deburring mechanism (6) includes a deburring installation support (601), a front pushing cylinder (602) provided horizontally on the deburring installation support (601), a rotating motor (603) acted on by the front pushing cylinder (602), two contact heads (604) provided at the end of the rotating motor (603), and a second pneumatic clamp jaw (605) for fixing the elongated valve stem (10), a working gap (606) for inserting the elongated valve stem (10) is formed between the two contact heads (604), and the contact heads (604) can abut against the elongated valve stem (10).

7. A deburring inspection machine for elongated valve stems as defined in claim 1, wherein: The unqualified product discharging mechanism (8) includes a defective product discharging channel (801) provided on any side of the fixed support (201), a discharging installation support (802) straddling the defective product discharging channel (801), a discharging pushing cylinder (803) provided on the discharging installation support (802), and a third pneumatic clamp jaw (804) acted on by the discharging pushing cylinder (803).

8. A deburring inspection machine for elongated valve stems as defined in claim 1 wherein: The qualified product discharging mechanism (9) comprises a qualified product discharging channel (901) connected to the end of the fixed support (201) and a discharging tool (902) arranged at the end of the fixed support (201), wherein the discharging tool (902) is located directly above the qualified product discharging channel (901), and the discharging tool (902) is provided with an inclined discharging guide opening (903) near one side of the qualified product discharging channel (901).

9. A deburring inspection machine for elongate valve stems as claimed in claim 1 wherein: The step-by-step switch device comprises a step-by-step driving motor (104), a rotating shaft (105) driven by the step-by-step driving motor (104) and located at the discharging port (103), a fixed guide block (106) located beside the discharging port (103), and a cam-shaped switch block (107) sleeved on the rotating shaft (105), wherein the fixed guide block (106) and the cam-shaped switch block (107) are alternately arranged. The step-by-step driving device comprises a translation push-pull cylinder (205), a step-by-step mounting bottom plate (206) driven by the translation push-pull cylinder (205), a plurality of lifting cylinders (207) fixed on the mounting bottom plate, and a lifting plate (208) acted on by the lifting cylinders (207), wherein the movable support (202) is fixed on the lifting plate (208).

10. A method of inspecting an elongated valve stem (10) suitable for use in a deburring inspection machine for elongated valve stems as claimed in any one of claims 1-9, characterized in that, Comprise: Step one, a large number of slender valve stems (10) are put into the inverted cone hopper (101), the step-by-step switch device is started to make the slender valve stems (10) pass through the discharging port (103) intermittently and fall into the material conveying device (102), and the material conveying device (102) is started to convey the slender valve stems (10) to the valve stem starting mechanism (3); Step two, the step-by-step driving device is started to make the movable support (202) reciprocate relative to the fixed support (201) in steps, and the second prong-shaped material placing tool (204) picks up the slender valve stem (10) on the first prong-shaped material placing tool (203) and moves the slender valve stem (10) from the previous first prong-shaped material placing tool (203) to the next first prong-shaped material placing tool (203) in each reciprocation cycle; Step three, the valve stem direction detection mechanism (4) detects the direction of the slender valve stem (10) on the corresponding first prong-shaped material placing tool (203) and feeds back the detection information to the electric control device; Step four, according to the direction detection result, if the direction is correct, the valve stem rotating mechanism (5) does not work; if the direction is incorrect, the valve stem rotating mechanism (5) is started to pick up the slender valve stem (10) on the corresponding first prong-shaped material placing tool (203), change the direction, and then put the slender valve stem (10) back onto the corresponding first prong-shaped material placing tool (203); Step five, the deburring mechanism (6) is started to deburr, polish and polish the slender valve stem (10) on the corresponding first prong-shaped material placing tool (203). Step six, start the valve stem length detection mechanism (7), the second positioning push plate device (704) first start by right to left push the corresponding first fork-shaped material placement tool (203) on the slender valve stem (10), then by the first visual detection device (701) corresponding to the first fork-shaped material placement tool (203) on the slender valve stem (10) is carried out left visual detection, and the detection information is fed back to the electric control device; then the second positioning push plate device (704) retreats, the first positioning push plate device (703) first starts by left to right push the corresponding first fork-shaped material placement tool (203) on the slender valve stem (10), then by the second visual detection device (702) corresponding to the first fork-shaped material placement tool (203) on the slender valve stem (10) is carried out right visual detection, and the detection information is fed back to the electric control device; Step seven, according to the information fed back by visual detection in step six, if the length detection result is unqualified, start the unqualified product discharge mechanism (8) to take out the unqualified slender valve stem (10); if the length detection structure is qualified, the slender valve stem (10) is discharged through the qualified product discharge mechanism (9).

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