Inner hole foreign matter detection device for valve guide pipe

Abstract

The utility model discloses an inner hole foreign matter detection device for a valve guide pipe. The inner hole foreign matter detection device comprises a lifting assembly for placing a valve guide pipe to be detected; the detection assembly comprises a detection rod, the detection rod is coaxial with the to-be-detected valve guide pipe, the detection rod moving along the axis of the to-be-detected valve guide pipe is embedded into an inner hole of the to-be-detected valve guide pipe, and when the detection rod is subjected to resistance applied by the inner hole, a detection part sends out a blocking signal. According to the utility model, the detection rod is embedded into the inner hole of the valve guide pipe to be detected to detect the inner surface of the valve guide pipe, and when the inner hole has bulges such as granular accumulation, the bulges can apply resistance to the end face of the detection rod to limit the detection rod to continuously move, so that the bulges on the inner surface of the inner hole can be known through the sensor; when the inner hole does not have protrusions such as particle accumulation, the detection rod is coaxial with the inner hole, so that the detection rod is not subjected to resistance, the detection rod can penetrate through the inner hole, the detection accuracy of the inner surface of the inner hole of the valve guide pipe is ensured, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve guide production, and particularly relates to an inner hole foreign object detection device for a valve guide. Background Art

[0002] Powder metallurgy is a material processing technology that uses metal powders as raw materials, compresses and sinters them at high temperatures to form solid components with desired properties. The main steps for sintering valve guides are as follows: mixing metal powders, placing the powders into a mold for pressing and forming, heating the pressed parts to a temperature close to their melting point for sintering, and performing finish machining on the sintered valve guides.

[0003] During the sintering and forming process of valve guides, due to too large powder particle size or uneven particle size distribution, it may cause excessive powder accumulation in some areas during the pressing process and insufficient fusion during the sintering process, forming granular accumulations, resulting in protrusions on the inner surface of the inner hole of the valve guide. When the finish machining tool touches the protrusion, it will cause an impact on the tool, and further cause tool breakage and tool failure, resulting in machining accidents. Summary of the Utility Model

[0004] The utility model provides an inner hole foreign object detection device for a valve guide to solve the detection problem of the inner surface of the inner hole after the valve guide is pressed and formed. The specific technical solutions are as follows:

[0005] An inner hole foreign object detection device for a valve guide includes: a lifting assembly for placing the valve guide to be detected; and a detection assembly. The detection assembly includes a detection rod, which is coaxial with the valve guide to be detected. The detection rod moving along the axis of the valve guide to be detected can be inserted into the inner hole of the valve guide to be detected. When the detection rod is subjected to the resistance applied by the inner hole, the detection part of the detection assembly for detecting the detection rod can emit a blocked signal.

[0006] Further, the detection assembly includes a detection bracket, and the detection rod is arranged on the detection bracket. The detection bracket drives the detection rod to continuously insert into the inner hole of the valve guide to be detected. When the detection rod is subjected to the resistance applied by the inner hole, the detection rod applies pressure to the detection bracket or a blocked signal is generated due to relative movement.

[0007] Preferably, the detection rod is slidably connected to the detection bracket. The detection assembly further includes an infrared sensor. When the detection rod is subjected to the resistance applied by the inner hole, the detection bracket continues to approach the valve guide to be detected, the detection rod and the valve guide to be detected remain stationary, the detection rod moves relative to the detection bracket and applies pressure to the detection bracket, and the infrared sensor can detect the relative movement between the detection rod and the detection bracket and generate a blocked signal.

[0008] Preferably, the detection assembly further includes a spring disposed on the side surface of the detection rod, the spring being disposed between the detection rod and the detection bracket. When the detection rod moves relative to the detection bracket, the spring is compressed to apply an elastic force to the detection rod.

[0009] Preferably, the detection assembly further includes a pressure sensor disposed at one end of the detection rod away from the inner hole. When the detection rod is subjected to the resistance applied by the inner hole, the resistance received by the detection rod is transmitted to the pressure sensor, and the pressure sensor generates a blocked signal.

[0010] Preferably, the detection assembly further includes: a detection cylinder for pushing the detection bracket to move, the telescopic direction of the detection cylinder being the same as the moving direction of the detection rod; a connecting block disposed on the side surface of the detection rod, the connecting block being capable of restricting the moving distance of the detection rod relative to the detection bracket; and a first guide rail slidably connected to the connecting block, the length direction of the first guide rail being parallel to the axis direction of the detection rod, and the first guide rail being fixedly connected to the detection bracket.

[0011] Preferably, the lifting assembly includes: a hoist capable of lifting and lowering the valve guide to be detected; a support plate disposed on the lifting mechanism of the hoist, the support plate being formed with a guide tube placement groove for placing the valve guide to be detected, the length direction of the guide tube placement groove being parallel to the axis direction of the valve guide to be detected, and the axes of the valve guides to be detected placed in the guide tube placement groove can coincide with the axis of the detection rod.

[0012] Preferably, it further includes a limiting assembly, the limiting assembly including: a limiting bracket disposed on the side surface of the valve guide to be detected; at least two positioning cylinders disposed on the limiting bracket, the moving direction of the positioning cylinder being parallel to the axis direction of the valve guide to be detected; at least two positioning baffles disposed on the telescopic ends of the positioning cylinders, the length direction of the positioning baffle being perpendicular to the axis direction of the detection rod, and the projection of the positioning baffle in the direction perpendicular to the axis of the detection rod can completely cover the projection of the valve guide to be detected in this direction; the positioning cylinder can drive the positioning baffle to apply pressure to both end faces of the valve guide to be detected, restricting the valve guide to be detected from moving relative to the lifting assembly.

[0013] From the above technical solutions, the present utility model has the following beneficial effects:

[0014] The utility model detects the inner surface of a valve guide to be detected by arranging a detection rod to be embedded in the inner hole of the valve guide. When there are protrusions such as granular accumulations in the inner hole, the protrusion can apply resistance to the end face of the detection rod to limit its further movement, and then it can be known through the sensor that there are protrusions on the inner surface of the inner hole; when there are no protrusions such as granular accumulations in the inner hole, the coaxiality of the detection rod and the inner hole can ensure that the detection rod will not be subjected to resistance, and then the detection rod can pass through the inner hole, ensuring the detection accuracy of the inner surface of the inner hole of the valve guide, improving the detection efficiency, and ensuring that the cutting tool for subsequent finish machining will not have accidents such as tool breakage or chipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 6 is a schematic structural diagram of the first embodiment of the utility model without a lifting component;

[0016] Figure 2 is Figure 1 front view of

[0017] Figure 3 is Figure 1 side view of

[0018] Figure 4 is Figure 1 top view of

[0019] Figure 5 FIG. 9 is a schematic structural diagram of the lifting component of the first embodiment of the utility model.

[0020] In the figure: 1, detection component; 2, lifting component; 3, limit component; 4, valve guide to be detected; 11, detection cylinder; 12, detection bracket; 13, detection rod; 14, connecting block; 15, spring; 16, first guide rail; 17, infrared sensor; 18, pressure sensor; 21, hoist; 23, pallet; 24, guide pipe placement groove; 31, limit bracket; 32, positioning cylinder; 33, positioning baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] The direction of movement of the detection component close to the lifting component is regarded as the front, and the opposite is the back.

[0024] Embodiment 1

[0025] As Figures 1 to 4 shown, the present utility model includes: a lifting component 2 for placing the valve guide 4 to be detected; and a detection component 1, the detection component 1 includes a detection rod 13, the detection rod 13 is coaxial with the valve guide 4 to be detected, and the detection rod 13 moving along the axis of the valve guide 4 to be detected gradually embeds into the inner hole of the valve guide 4 to be detected. When the detection rod 13 is subjected to the resistance applied by the inner hole, the detection part of the detection component 1 for detecting the detection rod 13 can emit a blocked signal.

[0026] Specifically, the lifting component 2 raises the height of the valve guide 4 to be detected to make it level with the height of the detection rod 13, so that the detection rod 13 is coaxial with the valve guide 4 to be detected. Then, when the detection rod 13 can move along its axis under the action of thrust, in actual production, the diameter of the detection rod 13 is generally 0.01 mm smaller than the inner hole diameter of the valve guide 4 to be detected, so that the detection rod 13 can not only embed into the inner hole, but also be blocked by the resistance applied by the accumulation when there is granular accumulation in the inner hole, thereby preventing the detection rod 13 from continuing to move. At this time, the detection part in the detection component 1 emits a blocked signal by judging the movement state of the detection rod 13, reminding the operator that there is a valve guide 4 to be detected with granular accumulation in the inner hole, and then facilitating the operator or the subsequent rejection mechanism to reject it, preventing it from entering the subsequent fine machining process and causing damage to the machining tool.

[0027] Furthermore, the detection component 1 includes a detection bracket 12, the detection rod 13 is arranged on the detection bracket 12, and the detection bracket 12 drives the detection rod 13 to continuously embed into the inner hole of the valve guide 4 to be detected. When the detection rod 13 is subjected to the resistance applied by the inner hole, the detection rod 13 applies pressure to the detection bracket 12 or a blocked signal is generated due to relative movement.

[0028] Specifically, multiple detection rods 13 with parallel axes are connected to the detection bracket 12 by means of fixed connection or sliding connection. The detection bracket 12 drives the detection rods 13 to move towards the inner hole of the valve guide 4 to be detected. When the detection rod 13 is slidably connected to the detection bracket 12, the detection rod 13 is subjected to the resistance exerted by the inner hole, and the detection bracket 12 will continue to move, causing relative movement between the detection rod 13 and the detection bracket 12. The detection part of the detection component 1 detects the relative movement and generates a blocked signal; when the detection rod 13 is fixedly connected to the detection bracket 12, the detection rod 13 is subjected to the resistance exerted by the inner hole, and the detection bracket 12 will also be subjected to the same pressure. The detection part of the detection component 1 detects that the detection bracket 12 is subjected to pressure and generates a blocked signal, thereby enabling the detection rod 13 to detect whether there is granular accumulation in the inner hole of the valve guide 4 to be detected.

[0029] Further, an embodiment in which the detection rod 13 is slidably connected to the detection bracket 12 is as follows: The detection component 1 further includes an infrared sensor 17. When the detection rod 13 is subjected to the resistance exerted by the inner hole, the detection bracket 12 continues to approach the valve guide 4 to be detected. The detection rod 13 and the valve guide 4 to be detected remain stationary, and the detection rod 13 moves relative to the detection bracket 12 and exerts pressure on the detection bracket 12. The infrared sensor 17 can detect the relative movement between the detection rod 13 and the detection bracket 12 and generate a blocked signal.

[0030] Specifically, during the process of the detection bracket 12 driving the detection rod 13 to embed into the inner hole of the valve guide 4 to be detected, when the detection rod 13 is unable to move further due to the resistance of the inner hole, the detection bracket 12 continues to move. Taking the moving direction of the detection bracket 12 as the front, the detection rod 13 will move backward relative to the detection bracket 12, causing the end of the detection rod 13 to move within the detection bracket 12. Thus, the infrared sensor 17 fixed on the detection bracket 12 can detect the movement of the end of the detection rod 13 within the detection bracket 12, and the infrared sensor 17 generates a blocked signal accordingly, thereby reminding the operator to handle it.

[0031] Further, the detection component 1 further includes a spring 15 disposed on the side of the detection rod 13. The spring 15 is disposed between the detection rod 13 and the detection bracket 12. When the detection rod 13 moves relative to the detection bracket 12, the spring 15 is compressed and exerts an elastic force on the detection rod 13.

[0032] Specifically, the spring 15 is sleeved on the shaft side of the detection rod 13, and both ends of the spring 15 are respectively connected to the detection rod 13 and the detection bracket 12. When the detection rod 13 moves backward relative to the detection bracket 12, the spring 15 is compressed and thus applies elastic forces to both the detection rod 13 and the detection bracket 12. When a pressure sensor 18 is provided at the contact part between the detection bracket 12 and the spring 15, a blocked signal can also be generated. After the detection of the detection rod 13 and the detection bracket 12 is completed, the detection rod 13 can return to its initial position under the action of the compressed spring 15, and repeatedly detect the inner hole of the valve guide 4 to be detected, avoiding the operator from resetting it and improving the detection efficiency.

[0033] Further, the detection assembly 1 further includes: a detection cylinder 11 for pushing the detection bracket 12 to move, the telescopic direction of the detection cylinder 11 being the same as the moving direction of the detection rod 13; a connection block 14 provided on the side surface of the detection rod 13, the connection block 14 being capable of restricting the moving distance of the detection rod 13 relative to the detection bracket 12; and a first guide rail 16 slidably connected to the connection block 14, the length direction of the first guide rail 16 being parallel to the axis direction of the detection rod 13, and the first guide rail 16 being fixedly connected to the detection bracket 12.

[0034] Specifically, the telescopic end of the detection cylinder 11 is fixedly connected to the detection bracket 12, and it can push the detection bracket 12 to drive the detection rod 13 to move forward. When the detection rod 13 is blocked and fixed, the detection bracket 12 can still move forward; secondly, a connection block 14 is fixedly connected to the front end of the detection rod 13, and the connection block 14 is closely attached to the front end of the detection bracket 12 under the action of the elastic force of the spring 15. When the detection rod 13 moves backward under pressure, the connection block 14 can restrict the detection rod 13 from detaching from the rear end of the detection bracket 12. When the detection rod 13 moves forward under the action of the elastic force, the connection block 14 can restrict the detection rod 13 from detaching from the front end of the detection bracket 12, thereby limiting the movement range of the detection rod 13 between the front and rear ends of the detection bracket 12, and enabling the detection rod 13 to repeatedly detect the inner hole of the valve guide 4 to be detected; secondly, the first guide rail 16 is fixedly connected to the detection bracket 12 and is slidably connected to the connection block 14, so that the movement track of the connection block 14 always coincides with the axis of the valve guide 4 to be detected, and thus when the detection rod 13 is moving, it is always coaxial with the valve guide 4 to be detected, avoiding an included angle between their axes, and thus applying a resistance to the detection rod 13 and interfering with the detection of whether there is granular accumulation in the inner hole by the detection rod 13. Coaxiality can improve the detection accuracy.

[0035] Embodiment of the fixed connection mode between the detection rod 13 and the detection bracket 12: The detection assembly 1 further includes a pressure sensor 18 provided at one end of the detection rod 13 away from the inner hole. When the detection rod 13 is subjected to the resistance applied by the inner hole, the resistance received by the detection rod 13 is transmitted to the pressure sensor 18, and the pressure sensor 18 generates a blocked signal.

[0036] Specifically, the detection bracket 12 drives the detection rod 13 to move forward. When the inner hole of the valve guide 4 to be detected restricts the detection rod 13 from continuing to move forward, a resistance is applied to it. This resistance is conducted through the detection rod 13 to the detection bracket 12, so that at this time the detection rod 13 applies a pressure to the detection bracket 12. As a result, the pressure sensor 18 provided at the connection position between the rear end of the detection rod 13 and the detection bracket 12 can detect this pressure, and then generate a blocked signal, thereby reminding the operator to remove the defective valve guide.

[0037] As Figure 5 shown, the lifting assembly 2 includes: a hoist 21 that can lift and lower the valve guide 4 to be detected; a tray 23 provided on the lifting mechanism of the hoist 21. The tray 23 is formed with a conduit placement groove 24 for placing the valve guide 4 to be detected. The length direction of the conduit placement groove 24 is parallel to the axial direction of the valve guide 4 to be detected. The axes of the valve guides 4 to be detected placed on the conduit placement groove 24 can all coincide with the axis of the detection rod 13.

[0038] Specifically, the hoist 21 is driven by a servo motor to drive a lead screw to achieve the lifting function, or it can also be achieved by a cylinder with a large stroke to achieve the lifting function. Its lifting direction is perpendicular to the plane formed by the axes of the valve guides 4 to be detected, so that when the hoist 21 lifts the tray 23 and thus lifts the valve guide 4 to be detected, the plane formed by the axes of the valve guides 4 to be detected is always translated parallelly. As a result, when the axis of one valve guide 4 to be detected coincides with the axis of the detection rod 13, the axes of all the valve guides 4 to be detected coincide with the axis of the detection rod 13, improving the detection accuracy; secondly, the conduit placement groove 24 is a V-shaped groove, enabling the valve guide 4 to be detected to be automatically centered when placed thereon, so that the positions of its axes are fixed. As a result, when the hoist 21 repeatedly lifts the conduit placement groove 24, the movement trajectories of the axes of the valve guides 4 to be detected are the same. Therefore, the probability of the detection rod 13 being coaxial with the valve guide 4 to be detected during repeated detection is increased, improving the detection efficiency.

[0039] Furthermore, Embodiment 1 further includes a limiting component 3, which includes: a limiting bracket 31 disposed on the side of the valve guide 4 to be detected; at least two positioning cylinders 32 disposed on the limiting bracket 31, the moving direction of the positioning cylinder 32 being parallel to the axial direction of the valve guide 4 to be detected; at least two positioning baffles 33 disposed on the telescopic ends of the positioning cylinders 32, the length direction of the positioning baffle 33 being perpendicular to the axial direction of the detection rod 13, and the projection of the positioning baffle 33 in the direction perpendicular to the axial direction of the detection rod 13 being able to completely cover the projection of the valve guide 4 to be detected in this direction; the positioning cylinder 32 can drive the positioning baffle 33 to apply pressure to both end faces of the valve guide 4 to be detected, restricting the valve guide 4 to be detected from moving relative to the lifting component 2.

[0040] Specifically, the limiting bracket 31 is a mounting bracket, which is fixedly connected to the detection component 1, the limiting component 3 and the lifting component 2 to keep their relative positions unchanged, so that Embodiment 1 can repeatedly detect the valve guide 4 to be detected; the limiting bracket 31 is fixed on both sides of the conduit placement groove 24, so that the valve guide 4 to be detected is between the limiting brackets 31. Secondly, the two positioning cylinders 32 respectively fixed on the limiting bracket 31 are jaw cylinders, and their telescopic direction is centering and contracting, so that the positioning baffle 33 fixedly connected to the telescopic end of the positioning cylinder 32 can move relatively closer under the drive of the positioning cylinder 32. Furthermore, the positioning baffles 33 disposed at both ends of the valve guide 4 to be detected can contact both end faces of the valve guide 4 to be detected under the drive of the positioning cylinder 32, thereby restricting its movement in the axial direction. Furthermore, when the detection rod 13 is inserted into the inner hole, when there is granular accumulation in the inner hole, the inner hole can apply resistance to the detection rod 13 without moving its position, ensuring the detection result.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0042] The technologies, shapes and structures not described in detail in the present invention are all well-known technologies.

Claims

1. An inner hole foreign object detection device for a valve guide, characterized in that Comprising: A lifting component (2) for placing the valve guide (4) to be detected; And A detection component (1), the detection component (1) includes a detection rod (13), the detection rod (13) is coaxial with the valve guide (4) to be detected, and the detection rod (13) moving along the axis of the valve guide (4) to be detected can be inserted into the inner hole of the valve guide (4) to be detected. When the detection rod (13) is subjected to the resistance exerted by the inner hole, the detection part of the detection component (1) for detecting the detection rod (13) can emit a blocked signal.

2. The inner hole foreign object detection device according to claim 1, wherein: The detection component (1) includes a detection bracket (12), the detection rod (13) is arranged on the detection bracket (12), the detection bracket (12) drives the detection rod (13) to continuously insert into the inner hole of the valve guide (4) to be detected. When the detection rod (13) is subjected to the resistance exerted by the inner hole, the detection rod (13) exerts pressure on the detection bracket (12) or a blocked signal is generated due to relative movement.

3. The inner hole foreign object detection device according to claim 2, characterized in that: The detection rod (13) is slidably connected to the detection bracket (12), and the detection component (1) further includes an infrared sensor (17). When the detection rod (13) is subjected to the resistance exerted by the inner hole, the detection bracket (12) continues to approach the valve guide (4) to be detected, the detection rod (13) and the valve guide (4) to be detected are fixed, the detection rod (13) moves relative to the detection bracket (12) and exerts pressure on the detection bracket (12), and the infrared sensor (17) can detect the relative movement between the detection rod (13) and the detection bracket (12) and generate a blocked signal.

4. The inner hole foreign object detection device according to claim 3, characterized in that: The detection component (1) further includes a spring (15) arranged on the side surface of the detection rod (13), the spring (15) is arranged between the detection rod (13) and the detection bracket (12), and when the detection rod (13) moves relative to the detection bracket (12), the spring (15) is compressed and exerts an elastic force on the detection rod (13).

5. The inner hole foreign object detection device according to claim 2, characterized in that: The detection component (1) further includes a pressure sensor (18) arranged at one end of the detection rod (13) away from the inner hole. When the detection rod (13) is subjected to the resistance exerted by the inner hole, the resistance received by the detection rod (13) is transmitted to the pressure sensor (18), and the pressure sensor (18) generates a blocked signal.

6. The inner hole foreign object detection device according to claim 2, characterized in that: The detection component (1) further includes: A detection cylinder (11) for pushing the detection bracket (12) to move, the telescopic direction of the detection cylinder (11) is the same as the moving direction of the detection rod (13); A connecting block (14) arranged on the side surface of the detection rod (13), the connecting block (14) can limit the moving distance of the detection rod (13) relative to the detection bracket (12); and A first guide rail (16) slidably connected to the connecting block (14), the length direction of the first guide rail (16) is parallel to the axis direction of the detection rod (13), and the first guide rail (16) is fixedly connected to the detection bracket (12).

7. The inner hole foreign object detection device according to claim 1, characterized in that: The lifting component (2) includes: A hoist (21) capable of lifting the valve guide (4) to be detected; A pallet (23) provided on the lifting mechanism of the hoist (21), the pallet (23) is formed with a guide pipe placement groove (24) for placing the valve guide (4) to be detected, the length direction of the guide pipe placement groove (24) is parallel to the axis direction of the valve guide (4) to be detected, and the axes of the valve guides (4) to be detected placed on the guide pipe placement groove (24) can coincide with the axis of the detection rod (13).

8. The inner hole foreign object detection device according to claim 1, characterized in that: It further includes a limit assembly (3), and the limit assembly (3) includes: A limit bracket (31) provided on the side of the valve guide (4) to be detected; At least two positioning cylinders (32) provided on the limit bracket (31), the moving direction of the positioning cylinder (32) is parallel to the axis direction of the valve guide (4) to be detected; At least two positioning baffles (33) provided on the telescopic ends of the positioning cylinders (32), the length direction of the positioning baffle (33) is perpendicular to the axis direction of the detection rod (13), and the projection of the positioning baffle (33) in the direction perpendicular to the axis of the detection rod (13) can completely cover the projection of the valve guide (4) to be detected in this direction; The positioning cylinder (32) can drive the positioning baffle (33) to apply pressure to the two end faces of the valve guide (4) to be detected, restricting the valve guide (4) to be detected from moving relative to the lifting assembly (2).

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