Measuring device for thermal deformation of powder metallurgy component

Abstract

The invention belongs to the technical field of deformation measurement, and particularly relates to a measuring device for thermal deformation of a powder metallurgy component, which comprises a base, a rotation detection mechanism, a detection result feedback mechanism, a cleaning processing mechanism, a detection result rapid comparison mechanism, a detection result recording mechanism and a PLC (Programmable Logic Controller). According to the invention, the thermal deformation degree of the powder metallurgy component can be rapidly detected, the detection end can be in stable contact with the powder metallurgy component for detection, the detection accuracy is effectively improved, the detection result can be directly compared with a standard value, whether the thermal deformation degree of the powder metallurgy component exceeds a threshold value or not can be rapidly obtained, and the detection accuracy is improved. The rotary power in the detection process can be used for providing cleaning power for the surface of the powder metallurgy component, the action of cleaning while detecting is achieved, then the problem that dust and impurities on the surface of the powder metallurgy component affect the detection accuracy is effectively avoided, and the situation that the thermal deformation degree exceeds a threshold value can be synchronously recorded.

Description

Technical Field

[0001] The invention belongs to the technical field of deformation measurement, and in particular relates to a device for measuring thermal deformation of powder metallurgy parts. Background Art

[0002] Powder metallurgy is a process technology for manufacturing metal materials or parts. It uses processes such as molding and sintering of metal powder or a mixture of metal powder and non-metal powder to make materials or parts with specific shapes, properties and sizes.

[0003] Mechanical structural parts manufactured by powder metallurgy methods usually use heat treatment to improve performance and extend service life. This is because heat treatment can change the organizational structure of the material, thereby improving its mechanical properties, hardness, wear resistance, corrosion resistance, etc. For example, the strength and hardness of parts can be improved by quenching and tempering, and the wear resistance and corrosion resistance of parts can be improved by surface treatments such as carburizing and nitriding. In the powder metallurgy process, residual stress will be generated inside the parts due to the influence of processes such as pressing and sintering. During the heat treatment process, as the temperature rises and changes, these residual stresses will gradually release, causing the parts to deform. For some mechanical structural parts with high precision requirements, deformation after heat treatment will cause dimensional deviations to exceed the allowable range, thereby affecting the assembly and performance of the parts.

[0004] By measuring thermal deformation, dimensional deviations can be discovered in a timely manner, and corresponding adjustment measures can be taken to ensure that the product meets the design requirements. For the surface of special-shaped powder metallurgy parts, traditional contact measuring tools (such as calipers, micrometers, etc.) are difficult to find stable measuring points, because the irregular shape of the surface may cause the measuring tool to be unable to make good contact with the surface of the part, resulting in measurement errors. For example, when there are protrusions, depressions or curved surfaces on the surface of the powder metallurgy part, the measuring claws of the caliper cannot completely fit the surface, resulting in inaccurate measurement values, which has a great impact on the accuracy of the measurement results. In addition, the test data needs to be compared multiple times, and it is impossible to quickly know whether the test results are within the range of deformation, which affects the detection efficiency. Summary of the invention

[0005] The object of the present invention is to provide a device for measuring thermal deformation of powder metallurgy parts in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solution: a device for measuring thermal deformation of powder metallurgy parts, comprising a base, and also comprising: A rotation detection mechanism is fixedly mounted on one side of the upper end of the base; A detection result feedback mechanism is fixedly mounted on the moving end of the rotation detection mechanism; A cleaning and processing mechanism is fixedly mounted on the rotation detection mechanism and is transmission-connected with the rotation detection mechanism; A detection result rapid comparison mechanism is fixedly mounted on the other side of the upper end of the base and is electrically connected to the detection result feedback mechanism; A detection result recording mechanism is fixedly mounted on the upper end of the detection result rapid comparison mechanism and is connected to the cleaning and processing mechanism; The PLC controller is fixedly mounted on the upper end of the base and is electrically connected to the rotation detection mechanism, the detection result feedback mechanism, the cleaning and processing mechanism, the detection result rapid comparison mechanism and the detection result recording mechanism respectively.

[0007] In the above-mentioned measuring device for thermal deformation of powder metallurgy parts, the rotating detection mechanism includes an L-shaped vertical plate fixedly mounted on the upper end of the base, the horizontal part of the L-shaped vertical plate is rotatably sleeved with a rotating shaft, the upper end of the L-shaped vertical plate is fixedly mounted with a rotating motor for driving the rotating shaft to rotate, the lower end of the rotating shaft is fixedly mounted with a rotating plate, the lower end of the rotating plate is fixedly connected with a supporting plate, the lower end of the supporting plate is provided with a resistance scraper, the upper end of the resistance scraper is symmetrically fixedly connected with two guide rods, the upper end of the guide rod passes through the upper end of the rotating plate, and two squeezing springs sleeved outside the guide rods are fixedly connected between the resistance scraper and the supporting plate.

[0008] In the above-mentioned measuring device for thermal deformation of powder metallurgy parts, the detection result feedback mechanism includes a transmission rack fixedly mounted on the upper end of the resistance scraper, a feedback shell fixedly mounted on the upper end of the support plate, a transmission screw rotatably connected in the feedback shell, and a first speed-increasing gear box located between the transmission rack and the feedback shell is also fixedly mounted on the upper end of the support plate, a transmission gear meshing with the transmission rack is fixedly connected to the input end of the first speed-increasing gear box, one end of the transmission screw extends through the feedback shell and is fixedly connected to the output end of the first speed-increasing gear box, a transmission seat is threadedly sleeved on the rod wall of the transmission screw, a feedback resistor rod arranged parallel to the transmission screw is fixedly mounted on the inner wall of the feedback shell, and a feedback conductive contact electrically in contact with the feedback resistor rod is fixedly mounted on the lower end of the transmission seat.

[0009] In the above-mentioned measuring device for thermal deformation of powder metallurgy parts, the cleaning and processing mechanism includes a second speed-increasing gearbox fixedly installed on the upper end of the L-shaped vertical plate, the input end of the second speed-increasing gearbox is fixedly connected to a driven gear, the shaft wall of the rotating shaft is fixedly sleeved with a driving gear meshing with the driven gear, the output end of the second speed-increasing gearbox is fixedly connected to a cam, an extension plate is fixedly installed on one side of the L-shaped vertical plate, an air supply shell is fixedly installed on the upper end of the extension plate, an air supply piston is provided in the sealing sleeve of the air supply shell, a plurality of push-pull rods are fixedly connected to one side of the air supply piston, and the plurality of push-pull rods are penetrated at one end away from the air supply piston. It extends out of the air supply shell and is fixedly connected with the same push-pull plate, which is located on one side of the cam, and a plurality of return springs sleeved on the outside of the push-pull rod are fixedly connected between the push-pull plate and the air supply shell. A suction pipe and a blowing pipe are fixedly connected to the side of the air supply shell away from the push-pull plate. Both the suction pipe and the blowing pipe are elastic telescopic pipes, and one-way valves are installed on the pipe walls. One end of the suction pipe away from the air supply shell is fixedly connected with a suction head, and the suction head is fixedly installed on the outer wall of the abutting scraper. A filter shell is also installed on the suction pipe, and a filter mesh plate is fixedly installed in the filter shell, and the filter shell is fixedly installed on the upper end of the extension plate.

[0010] In the above-mentioned measuring device for thermal deformation of powder metallurgy parts, the detection result rapid comparison mechanism includes a comparison ring fixedly mounted on the upper end of the base, and a mounting frame located on the upper side of the comparison ring is also fixedly mounted on the upper end of the base, a synchronous shaft coinciding with the central axis of the comparison ring is rotatably sleeved on the mounting frame, a motor drive assembly for driving the synchronous shaft to rotate is fixedly mounted on the upper end of the mounting frame, a fixed shell is fixedly mounted on the lower end of the synchronous shaft, a plurality of jacks are symmetrically opened on one side of the fixed shell, and adjustment rods are movably inserted in the corresponding jacks, and one end of the plurality of adjustment rods located in the fixed shell is fixedly connected to the same An adjusting plate, wherein a thrust permanent magnet plate is fixedly mounted on one side of the adjusting plate away from the adjusting rod, a thrust electromagnetic plate arranged opposite to the thrust permanent magnet plate is fixedly mounted on the inner wall of the fixed shell, the feedback conductive contact piece and the feedback resistor rod are connected in series to the power supply circuit of the thrust electromagnetic plate, one end of a plurality of adjusting rods away from the adjusting plate penetrates and extends out of the fixed shell, and are fixedly connected with a synchronization plate of the same L-shaped structure, a plurality of compensation springs sleeved on the outside of the adjusting rod are fixedly connected between the synchronization plate and the fixed shell, a side plate located on the inner and outer sides of a comparison ring is fixedly mounted on the lower end of the synchronization plate, and a trigger switch is fixedly mounted on the side of the side plate close to the comparison ring.

[0011] In the above-mentioned measuring device for thermal deformation of powder metallurgy parts, the detection result recording mechanism includes an annular mounting frame fixedly mounted on the upper end of the mounting frame, and aluminum foil is fixedly mounted on the upper end of the annular mounting frame. The upper end shaft wall of the synchronous shaft is also fixedly sleeved with a cross plate, and two positioning cylinders arranged on the inner and outer sides are fixedly mounted on the cross plate. The sealing sleeve in the positioning cylinder is provided with a lifting piston, and the lower end of the lifting piston is fixedly connected with a piercing rod, and the lower end of the piercing rod extends through the lower end of the positioning cylinder. The lower end of the lifting piston and the bottom of the inner wall of the positioning cylinder are fixedly provided with a push spring sleeved outside the piercing rod, and the upper end of the positioning cylinder is fixedly connected with a branch pipe connected with the blowing pipe, and a first solenoid valve is installed on the branch pipe, and the rear end of the blowing pipe is fixedly connected with a second solenoid valve.

[0012] In the above-mentioned device for measuring thermal deformation of powder metallurgy parts, a limit slider is fixedly mounted on the outer wall of the transmission seat, and a limit slot matching and slidingly connected with the limit slider is opened on the inner wall of the feedback housing.

[0013] In the above-mentioned device for measuring thermal deformation of powder metallurgy parts, a cleaning door is provided on the side wall of the filter shell, and the position of the cleaning door is arranged corresponding to the position of the filter screen plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the set rotating detection mechanism, detection result feedback mechanism, and detection result rapid comparison mechanism, the thermal deformation degree of powder metallurgy parts can be quickly detected, and the detection end can be in stable contact with the metallurgical parts for detection. Compared with traditional contact measuring tools (such as calipers, micrometers, etc.), the irregular shape of the surface causes the measuring tool to be unable to contact the part surface well, thus causing measurement errors. The detection accuracy is effectively improved, and the detection result can be directly compared with the standard value, so as to quickly determine whether the thermal deformation degree of the powder metallurgy parts exceeds the threshold, quickly obtain the detection result, and effectively improve the detection efficiency.

[0015] 2. Through the cleaning and processing mechanism, the rotational power in the detection process can be used to provide cleaning power for the surface of the powder metallurgy parts, so as to realize the action of cleaning while detecting, thereby effectively avoiding the problem of dust and impurities on the surface of the powder metallurgy parts affecting the detection accuracy and improving the detection quality.

[0016] 3. Through the detection result recording mechanism, when it is detected that the thermal deformation degree of the powder metallurgy parts exceeds the threshold, the situation of the thermal deformation degree exceeding the threshold can be recorded simultaneously, so as to provide the staff with better subsequent processing data, provide a basis for problem tracing, and enable the staff to quickly and accurately obtain the location of the metallurgical parts where the thermal deformation exceeds the range, which is convenient for the staff to trace back and process later. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view cross-sectional structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the rotation detection mechanism of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of the detection result feedback mechanism of the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the cleaning and processing mechanism of the present invention; Figure 5 It is a schematic cross-sectional structure diagram of the detection result rapid comparison mechanism of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the detection result recording mechanism of the present invention; Figure 7 It is a schematic diagram of the front cross-sectional structure of the detection result recording mechanism of the present invention; Figure 8 yes Figure 7 A schematic diagram of the cross-sectional structure of the middle positioning tube; Fig. 9 It is a schematic structural diagram of the comparison ring of the present invention.

[0018] In the figure: 1 base, 2 rotation detection mechanism, 21 L-shaped vertical plate, 22 rotating shaft, 23 rotating motor, 24 rotating plate, 25 supporting plate, 26 contact scraper, 27 guide rod, 28 squeezing spring, 3 detection result feedback mechanism, 31 transmission rack, 32 feedback shell, 33 transmission screw, 34 first speed increasing gear box, 35 transmission gear, 36 transmission seat, 37 feedback resistor rod, 38 feedback conductive contact piece, 4 cleaning processing mechanism, 41 second speed increasing gear box, 42 driven gear, 43 driving gear, 44 cam, 45 extension plate, 46 air supply shell, 47 air supply piston, 48 push-pull rod, 49 push-pull plate, 410 reset spring, 411 suction pipe, 412 Blowing tube, 413 one-way valve, 414 suction head, 415 filter shell, 416 filter screen plate, 5 detection result rapid comparison mechanism, 51 comparison ring, 52 mounting frame, 53 synchronization shaft, 54 motor drive assembly, 55 fixed shell, 56 adjustment rod, 57 adjustment plate, 58 thrust permanent magnet plate, 59 thrust electromagnetic plate, 510 synchronization plate, 511 compensation spring, 512 side plate, 513 trigger switch, 6 detection result recording mechanism, 61 annular mounting frame, 62 aluminum foil, 63 horizontal plate, 64 positioning cylinder, 65 lifting piston, 66 puncture rod, 67 push spring, 68 branch pipe, 69 first solenoid valve, 610 second solenoid valve, 7PLC controller. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] like Figure 1-Figure 9 As shown, a device for measuring thermal deformation of a powder metallurgy part comprises a base 1 and also comprises: The rotating detection mechanism 2 is fixedly mounted on one side of the upper end of the base 1. The rotating detection mechanism 2 includes an L-shaped vertical plate 21 fixedly mounted on the upper end of the base 1. The horizontal part of the L-shaped vertical plate 21 is rotatably sleeved with a rotating shaft 22. A rotating motor 23 for driving the rotating shaft 22 to rotate is fixedly mounted on the upper end of the L-shaped vertical plate 21. A rotating plate 24 is fixedly mounted on the lower end of the rotating shaft 22. A supporting plate 25 is fixedly connected to the lower end of the rotating plate 24. A resisting scraper 26 is provided at the lower end of the supporting plate 25. Two guide rods 27 are symmetrically fixedly connected to the upper end of the resisting scraper 26. The upper end of the guide rod 27 passes through the upper end of the rotating plate 24. Two squeezing springs 28 sleeved on the outside of the guide rod 27 are fixedly connected between the resisting scraper 26 and the supporting plate 25. This can realize comprehensive and rapid thermal deformation detection of powder metallurgy parts, improve detection efficiency, and enable the detection end to always be in contact with the surface of the powder metallurgy parts to ensure detection quality.

[0021] The detection result feedback mechanism 3 is fixedly mounted on the moving end of the rotating detection mechanism 2. The detection result feedback mechanism 3 includes a transmission rack 31 fixedly mounted on the upper end of the contact scraper 26. A feedback shell 32 is fixedly mounted on the upper end of the supporting plate 25. A transmission screw 33 is rotatably connected in the feedback shell 32. A first speed-increasing gear box 34 located between the transmission rack 31 and the feedback shell 32 is also fixedly mounted on the upper end of the supporting plate 25. A transmission gear 35 meshing with the transmission rack 31 is fixedly connected at the input end of the first speed-increasing gear box 34. One end of the transmission screw 33 extends through the feedback shell 32 and is connected to the first speed-increasing gear box 34. 4 is fixedly connected, the rod wall of the transmission screw 33 is threadedly sleeved with a transmission seat 36, the inner wall of the feedback shell 32 is fixedly provided with a feedback resistor rod 37 arranged parallel to the transmission screw 33, the lower end of the transmission seat 36 is fixedly provided with a feedback conductive contact piece 38 electrically contacting the feedback resistor rod 37, the outer wall of the transmission seat 36 is fixedly provided with a limit slider, the inner wall of the feedback shell 32 is provided with a limit slide groove matching and slidingly connected with the limit slider, which can effectively feedback the degree of thermal deformation on the surface of the powder metallurgy part during the detection process, and based on the first speed increasing gear box 34, the slight deformation degree can be amplified to improve the feedback accuracy.

[0022] The cleaning and processing mechanism 4 is fixedly mounted on the rotating detection mechanism 2 and is transmission-connected with the rotating detection mechanism 2. The cleaning and processing mechanism 4 includes a second speed-increasing gearbox 41 fixedly mounted on the upper end of the L-shaped vertical plate 21. The input end of the second speed-increasing gearbox 41 is fixedly connected with a driven gear 42. The shaft wall of the rotating shaft 22 is fixedly sleeved with a driving gear 43 meshing with the driven gear 42. The output end of the second speed-increasing gearbox 41 is fixedly connected with a cam 44. An extension plate 45 is fixedly mounted on one side of the L-shaped vertical plate 21. An air supply shell 46 is fixedly mounted on the upper end of the extension plate 45. An air supply piston 47 is provided in a sealing sleeve in the air supply shell 46. A plurality of push-pull rods 48 are fixedly connected to one side of the air supply piston 47. One end of the plurality of push-pull rods 48 away from the air supply piston 47 penetrates through the air supply shell 46 and extends out of the air supply shell 46, and is fixedly connected with the same push-pull plate 49. The push-pull plate 49 is located on one side of the cam 44. A plurality of push-pull rods 48 sleeved on the push-pull plate 49 and the air supply shell 46 are fixedly connected. A return spring 410 outside the pull rod 48 and a suction pipe 411 and a blowing pipe 412 are fixedly connected to the side of the air supply shell 46 away from the push-pull plate 49. The suction pipe 411 and the blowing pipe 412 are both elastic telescopic tubes, and a one-way valve 413 is installed on the tube wall. The end of the suction pipe 411 away from the air supply shell 46 is fixedly connected to a suction head 414, and the suction head 414 is fixedly installed on the outer wall of the scraper 26. A filter shell 415 is also installed on the suction pipe 411. A filter screen plate 416 is fixedly installed in the filter shell 415. The filter shell 415 is fixedly installed on the upper end of the extension plate 45. A cleaning door is provided on the side wall of the filter shell 415, and the position of the cleaning door corresponds to the position of the filter screen plate 416. The rotational power in the detection process can be used to provide cleaning power for the surface of the powder metallurgical parts, thereby realizing the action of cleaning while detecting, thereby effectively avoiding the problem that dust and impurities on the surface of the powder metallurgical parts affect the detection accuracy, thereby improving the detection quality.

[0023] The detection result rapid comparison mechanism 5 is fixedly mounted on the other side of the upper end of the base 1 and is electrically connected to the detection result feedback mechanism 3. The detection result rapid comparison mechanism 5 includes a comparison ring 51 fixedly mounted on the upper end of the base 1. The upper end of the base 1 is also fixedly mounted with a mounting frame 52 located on the upper side of the comparison ring 51. A synchronous shaft 53 coinciding with the central axis of the comparison ring 51 is rotatably sleeved on the mounting frame 52. A motor drive assembly 54 for driving the synchronous shaft 53 to rotate is fixedly mounted on the upper end of the mounting frame 52. A fixed shell 55 is fixedly mounted on the lower end of the synchronous shaft 53. A plurality of jacks are symmetrically opened on one side of the fixed shell 55, and an adjusting rod 56 is movably inserted in the corresponding jacks. One end of the plurality of adjusting rods 56 located in the fixed shell 55 is fixedly connected with the same adjusting plate 57. A thrust permanent magnet plate 58 is fixedly mounted on the side of the adjusting plate 57 away from the adjusting rod 56. A thrust electromagnetic plate 59 arranged opposite to the thrust permanent magnet plate 58 is fixedly installed on the inner wall of the fixed shell 55, the feedback conductive contact piece 38 and the feedback resistor rod 37 are connected in series to the power supply circuit of the thrust electromagnetic plate 59, and a plurality of adjusting rods 56 extend through the fixed shell 55 at one end away from the adjusting plate 57 and are fixedly connected with a synchronization plate 510 of the same L-shaped structure, and a plurality of compensation springs 511 sleeved on the outside of the adjusting rods 56 are fixedly connected between the synchronization plate 510 and the fixed shell 55, and a side plate 512 located on the inner and outer sides of the comparison ring 51 is fixedly installed on the lower end of the synchronization plate 510, and a trigger switch 513 is fixedly installed on the side of the side plate 512 close to the comparison ring 51, which can directly compare the test result with the standard value, and then quickly determine whether the thermal deformation degree of the powder metallurgy part exceeds the threshold value, quickly obtain the test result, and effectively improve the detection efficiency.

[0024] The detection result recording mechanism 6 is fixedly mounted on the upper end of the detection result rapid comparison mechanism 5 and is connected to the cleaning and processing mechanism 4. The detection result recording mechanism 6 includes an annular mounting frame 61 fixedly mounted on the upper end of the mounting frame 52. An aluminum foil 62 is fixedly mounted on the upper end of the annular mounting frame 61. A horizontal plate 63 is also fixedly sleeved on the upper end shaft wall of the synchronous shaft 53. Two positioning cylinders 64 arranged on the inner and outer sides are fixedly mounted on the horizontal plate 63. A lifting piston 65 is provided in a sealing sleeve in the positioning cylinder 64. A puncture rod 66 is fixedly connected to the lower end of the lifting piston 65. The lower end of the puncture rod 66 extends through the lower end of the positioning cylinder 64. The lower end of the lifting piston 65 and the positioning cylinder 64 are fixedly mounted on the lower end of the lifting piston 65. A push spring 67 mounted on the outside of the piercing rod 66 is fixedly installed at the bottom of the inner wall of the positioning tube 64, and a branch pipe 68 connected to the blowing tube 412 is fixedly connected to the upper end of the positioning tube 64. A first solenoid valve 69 is installed on the branch pipe 68, and a second solenoid valve 610 is fixedly connected to the rear end of the blowing tube 412. When it is detected that the degree of thermal deformation of the powder metallurgy part exceeds the threshold, the situation where the degree of thermal deformation exceeds the threshold can be synchronously recorded, thereby providing the staff with better subsequent processing data, providing a basis for problem tracing, and enabling the staff to quickly and accurately obtain the position of the metallurgical part where the thermal deformation exceeds the range, facilitating the subsequent tracing processing by the staff.

[0025] The PLC controller 7 is fixedly mounted on the upper end of the base 1 and is electrically connected to the rotation detection mechanism 2, the detection result feedback mechanism 3, the cleaning and processing mechanism 4, the detection result rapid comparison mechanism 5 and the detection result recording mechanism 6 respectively.

[0026] The operating principle of the present invention is described as follows: the powder metallurgy part to be tested is fixed to the upper end of the base 1 by a clamp, and the abutting scraper 26 abuts against the powder metallurgy part under the action of the squeezing spring 28. The clamp involved here can be a mechanical clamp or a magnetic clamp. The mechanical clamp can be a vise clamp or a chuck clamp according to the needs; The PLC controller 7 controls the action of the rotating motor 23. The rotating motor 23 drives the scraper 26 to move on the powder metallurgy part through the rotating shaft 22, the rotating plate 24, the supporting plate 25 and the guide rod 27. The rotating shaft 22 drives the driving gear 43 to rotate synchronously. The input end of the second speed-increasing gearbox 41 is driven to rotate synchronously through the meshing action of the driving gear 43 and the driven gear 42, thereby driving the cam 44 to rotate at a higher speed. When the protruding part of the cam 44 acts on the push-pull plate 49, the push-pull plate 49 cooperates with the push-pull rod 48 to overcome the elastic force of the return spring 410 to push the air supply piston 47 to move in the air supply shell 46, and the air supply shell 46 is filled with air. The air is discharged through the blowing pipe 412, and when the protruding part of the cam 44 leaves the push-pull plate 49, the air supply piston 47 moves back under the action of the return spring 410, thereby forming a negative pressure suction force in the air supply shell 46, and cooperating with the suction pipe 411 to provide negative pressure suction to the suction head 414, so that the dust and impurities on the surface of the powder metallurgy part are quickly adsorbed and processed at the front side of the movement of the scraper 26, and the dust and impurities are intercepted by the filter screen plate 416 in the filter shell 415, providing a better environment for the detection of the degree of thermal deformation on the surface of the powder metallurgy part, and using the rotational driving force of the detection as the cleaning power, saving energy and easy to operate; As the surface of the powder metallurgy part changes, the scraper 26 moves up and down synchronously under the compensation of the squeezing spring 28, thereby driving the transmission rack 31 to move up and down synchronously. During the detection process, the PLC controller 7 controls the motor drive assembly 54 to drive the synchronous shaft 53 to move synchronously, so that the rotation angular velocity of the synchronous shaft 53 and the rotating shaft 22 is the same. The comparison ring 51 is a standard sample. The up and down movement of the transmission rack 31 will drive the transmission gear 35 to rotate synchronously, and the transmission gear 35 drives the transmission screw 33 to rotate. Through the threaded sleeve effect of the transmission screw 33 and the transmission seat 36, the transmission seat 36 drives the feedback conductive contact 38 on the feedback resistor The feedback conductive contact piece 38 and the feedback resistor rod 37 are connected in series to the power supply circuit of the thrust electromagnetic plate 59. The thrust electromagnetic plate 59 generates the same magnetism as the thrust permanent magnet plate 58 when it is energized, thereby driving the adjustment plate 57 to drive the adjustment rod 56 to overcome the action of the compensation spring 511 and drive the synchronous plate 510, the side plate 512 and the trigger switch 513 to move. When the contact scraper 26 detects that the surface of the powder metallurgy part is bulged due to thermal deformation, the contact scraper 26 will move upward a distance relative to the standard state of the powder metallurgy part, thereby driving the feedback conductive contact piece 38 to slide further backward on the feedback resistor rod 37, so that the feedback conductive contact piece 38 can slide backward on the feedback resistor rod 37. The resistance value of the feed resistor rod 37 in the current position is smaller than that in the standard state. At this time, the thrust electromagnetic plate 59 will supply a larger power supply current, making the magnetism of the thrust electromagnetic plate 59 relatively stronger, thereby increasing the distance that the synchronization plate 510 moves outward, so that the inner trigger switch 513 contacts the inner side of the comparison ring 51, so that the inner trigger switch 513 is pressed and triggered, indicating that the degree of thermal deformation convexity of the current detection position of the powder metallurgy part exceeds the preset threshold value, and the degree of thermal deformation of the powder metallurgy part here is unqualified. At this time, the PLC controller 7 closes the second solenoid valve 610 on the blowing pipe 412 and opens the inner branch pipe 413. The first solenoid valve 69 on 68, this process is maintained for 1 second, the air exhausted in the blowing tube 412 will be transported to the branch pipe 68 located inside within this 1 second, and the air pressure is provided in the positioning cylinder 64 located inside, so that the lifting piston 65 pushes the piercing rod 66 in the positioning cylinder 64 to overcome the elastic force of the push spring 67 and move downward, so that the inner piercing rod 66 inserts a marking hole on the aluminum foil 62, and after 1 second, the PLC controller 7 controls the second solenoid valve 610 to open, the air in the positioning cylinder 64 is exhausted under the action of the push spring 67, and the piercing rod 66 is reset, and at this time the PLC controller 7 closes the first solenoid valve 69 again; On the contrary, when the scraper 26 detects that the surface of the powder metallurgy part is dented due to thermal deformation, the scraper 26 will move downward relative to the position in the standard detection state, so that the feedback conductive contact 38 is located on the feedback resistor rod 37. The feedback resistor rod 37 has a relatively larger access resistance, which makes the synchronization plate 510 relatively backward, and the outer trigger switch 513 is pressed and triggered by the comparison ring 51. At this time, the PLC controller 7 controls the first solenoid valve 69 on the outer branch pipe 68 to open, and the second solenoid valve 610 on the blowing pipe 412 is closed. The above work is repeated to complete the marking work. The existence of the marking hole can feedback that the thermal deformation degree of the powder metallurgy part is unqualified, and the marks on the inner and outer sides can quickly feedback whether it is convex or concave, which is convenient for the subsequent feedback processing of the staff.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for measuring thermal deformation of powder metallurgy parts, comprising a base (1), characterized in that: Also includes: A rotation detection mechanism (2) is fixedly mounted on one side of the upper end of the base (1); A detection result feedback mechanism (3) is fixedly mounted on the moving end of the rotation detection mechanism (2); A cleaning and processing mechanism (4) is fixedly mounted on the rotation detection mechanism (2) and is transmission-connected to the rotation detection mechanism (2); A detection result rapid comparison mechanism (5) is fixedly mounted on the other side of the upper end of the base (1) and is electrically connected to the detection result feedback mechanism (3); A test result recording mechanism (6) is fixedly mounted on the upper end of the test result rapid comparison mechanism (5) and is connected to the cleaning and processing mechanism (4); A PLC controller (7) is fixedly mounted on the upper end of the base (1) and is electrically connected to the rotation detection mechanism (2), the detection result feedback mechanism (3), the cleaning and processing mechanism (4), the detection result rapid comparison mechanism (5) and the detection result recording mechanism (6).

2. A device for measuring thermal deformation of powder metallurgy parts according to claim 1, characterized in that: The rotation detection mechanism (2) comprises an L-shaped vertical plate (21) fixedly mounted on the upper end of the base (1); a rotating shaft (22) is rotatably sleeved on the horizontal portion of the L-shaped vertical plate (21); a rotating motor (23) for driving the rotating shaft (22) to rotate is fixedly mounted on the upper end of the L-shaped vertical plate (21); a rotating plate (24) is fixedly mounted on the lower end of the rotating shaft (22); a supporting plate (25) is fixedly connected to the lower end of the rotating plate (24); a resisting scraper (26) is provided at the lower end of the supporting plate (25); two guide rods (27) are symmetrically fixedly connected to the upper end of the resisting scraper (26); the upper end of the guide rod (27) passes through the upper end of the rotating plate (24); and two squeezing springs (28) sleeved outside the guide rods (27) are fixedly connected between the resisting scraper (26) and the supporting plate (25).

3. A device for measuring thermal deformation of powder metallurgy parts according to claim 2, characterized in that: The detection result feedback mechanism (3) comprises a transmission rack (31) fixedly mounted on the upper end of the abutting scraper (26); a feedback shell (32) fixedly mounted on the upper end of the supporting plate (25); a transmission screw (33) rotatably connected inside the feedback shell (32); a first speed increasing gear box (34) located between the transmission rack (31) and the feedback shell (32) fixedly mounted on the upper end of the supporting plate (25); an input end of the first speed increasing gear box (34) fixedly connected to the transmission rack (31); and a first speed increasing gear box (34) connected to the transmission rack (31) and the feedback shell (32). 1) a meshing transmission gear (35), one end of the transmission screw (33) penetrates through and extends out of the feedback housing (32) and is fixedly connected to the output end of the first speed increasing gearbox (34), a transmission seat (36) is threadedly sleeved on the rod wall of the transmission screw (33), a feedback resistor rod (37) arranged parallel to the transmission screw (33) is fixedly mounted on the inner wall of the feedback housing (32), and a feedback conductive contact piece (38) in electrical contact with the feedback resistor rod (37) is fixedly mounted on the lower end of the transmission seat (36).

4. The device for measuring thermal deformation of powder metallurgy parts according to claim 3, characterized in that: The cleaning and processing mechanism (4) comprises a second speed-increasing gearbox (41) fixedly mounted on the upper end of the L-shaped vertical plate (21); the input end of the second speed-increasing gearbox (41) is fixedly connected to a driven gear (42); the shaft wall of the rotating shaft (22) is fixedly sleeved with a driving gear (43) meshing with the driven gear (42); the output end of the second speed-increasing gearbox (41) is fixedly connected to a cam (44); an extension plate (45) is fixedly mounted on one side of the L-shaped vertical plate (21); an air supply shell (46) is fixedly mounted on the upper end of the extension plate (45); an air supply piston (47) is provided in a sealing sleeve inside the air supply shell (46); a plurality of push-pull rods (48) are fixedly connected to one side of the air supply piston (47); one end of the plurality of push-pull rods (48) away from the air supply piston (47) extends through the air supply shell (46) and is fixedly connected to the same push-pull plate (49); The push-pull plate (49) is located on one side of the cam (44); a plurality of return springs (410) sleeved outside the push-pull rod (48) are fixedly connected between the push-pull plate (49) and the air supply shell (46); a suction pipe (411) and a blowing pipe (412) are fixedly connected on the side of the air supply shell (46) away from the push-pull plate (49); the suction pipe (411) and the blowing pipe (412) are both elastic telescopic pipes, and one-way valves are installed on the pipe walls. (413), one end of the suction pipe (411) away from the air supply shell (46) is fixedly connected to a suction head (414), and the suction head (414) is fixedly mounted on the outer wall of the abutting scraper (26). A filter shell (415) is also mounted on the suction pipe (411), and a filter screen plate (416) is fixedly mounted inside the filter shell (415). The filter shell (415) is fixedly mounted on the upper end of the extension plate (45).

5. The device for measuring thermal deformation of powder metallurgy parts according to claim 4, characterized in that: The detection result rapid comparison mechanism (5) comprises a comparison ring (51) fixedly mounted on the upper end of the base (1); a mounting frame (52) located on the upper side of the comparison ring (51) is also fixedly mounted on the upper end of the base (1); a synchronization shaft (53) coinciding with the central axis of the comparison ring (51) is rotatably sleeved on the mounting frame (52); a motor drive assembly (54) for driving the synchronization shaft (53) to rotate is fixedly mounted on the upper end of the mounting frame (52); a fixed shell (55) is fixedly mounted on the lower end of the synchronization shaft (53); a plurality of plug holes are symmetrically opened on one side of the fixed shell (55), and adjustment rods (56) are movably sleeved in the corresponding plug holes; one end of the plurality of adjustment rods (56) located in the fixed shell (55) is fixedly connected to the same adjustment plate (57); one end of the adjustment plate (57) away from the adjustment rod (56) is fixedly connected to the same adjustment plate (57). A thrust permanent magnet plate (58) is fixedly mounted on the side, a thrust electromagnetic plate (59) arranged opposite to the thrust permanent magnet plate (58) is fixedly mounted on the inner wall of the fixed shell (55), the feedback conductive contact piece (38) and the feedback resistance rod (37) are connected in series to the power supply circuit of the thrust electromagnetic plate (59), a plurality of adjustment rods (56) extend through one end away from the adjustment plate (57) and extend out of the fixed shell (55), and are fixedly connected to a synchronization plate (510) of the same L-shaped structure, a plurality of compensation springs (511) sleeved on the outside of the adjustment rods (56) are fixedly connected between the synchronization plate (510) and the fixed shell (55), a side plate (512) located on both sides of the inner and outer sides of the comparison ring (51) is fixedly mounted on the lower end of the synchronization plate (510), and a trigger switch (513) is fixedly mounted on one side of the side plate (512) close to the comparison ring (51).

6. The device for measuring thermal deformation of powder metallurgy parts according to claim 5, characterized in that: The detection result recording mechanism (6) comprises an annular mounting frame (61) fixedly mounted on the upper end of the mounting frame (52), an aluminum foil (62) fixedly mounted on the upper end of the annular mounting frame (61), a transverse plate (63) fixedly sleeved on the upper end shaft wall of the synchronization shaft (53), two positioning cylinders (64) arranged on the inner and outer sides of the transverse plate (63) fixedly mounted, a lifting piston (65) sealed inside the positioning cylinder (64), and a puncture rod (65) fixedly connected to the lower end of the lifting piston (65) 66), the lower end of the piercing rod (66) penetrates through the lower end of the positioning tube (64), the lower end of the lifting piston (65) and the bottom of the inner wall of the positioning tube (64) are fixedly provided with a push spring (67) sleeved outside the piercing rod (66), the upper end of the positioning tube (64) is fixedly connected with a branch tube (68) connected with the blow tube (412), the branch tube (68) is provided with a first solenoid valve (69), and the rear end of the blow tube (412) is fixedly connected with a second solenoid valve (610).

7. The device for measuring thermal deformation of powder metallurgy parts according to claim 3, characterized in that: A limiting slide block is fixedly mounted on the outer wall of the transmission seat (36), and a limiting slide groove matching and slidingly connected with the limiting slide block is opened on the inner wall of the feedback housing (32).

8. The device for measuring thermal deformation of powder metallurgy parts according to claim 4, characterized in that: The side wall of the filter housing (415) is provided with a cleaning door, and the position of the cleaning door is arranged corresponding to the position of the filter screen plate (416).

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