A measuring device for the thermal deformation of powder metallurgy parts

Abstract

The present invention belongs to the technical field of deformation measurement, and in particular relates to a measurement device for the thermal deformation of powder metallurgy parts, including a base, and further including: a rotation detection mechanism, a detection result feedback mechanism, a cleaning and processing mechanism, a detection result quick comparison mechanism, a detection result recording mechanism, and a PLC controller. The present invention can quickly detect the thermal deformation degree of powder metallurgy parts, and the detection end can stably contact the metallurgy parts for detection, effectively improving the detection accuracy. Moreover, it can directly compare the detection result with the standard value, and then can quickly obtain whether the thermal deformation degree of the powder metallurgy parts exceeds the threshold. It can use the rotation power during the detection process to provide cleaning power for the surface of the powder metallurgy parts, realizing the action of cleaning while detecting, and thus effectively avoiding the problem that the dust and impurities on the surface of the powder metallurgy parts affect the detection accuracy. It can synchronously record the situation where the thermal deformation degree exceeds the threshold.

Description

Technical Field

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

[0002] Powder metallurgy is a process technology for manufacturing metal materials or parts. It forms and sinters a mixture of metal powders or a mixture of metal powders and non-metal powders to produce materials or parts with specific shapes, properties, and dimensions.

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

[0004] By measuring thermal deformation, dimensional deviations can be detected 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, it is difficult for traditional contact measurement tools (such as calipers, micrometers, etc.) to find stable measurement points because the irregular surface shape may cause the measurement tool to not contact the part surface well, resulting in measurement errors. For example, when there are protrusions, depressions, or curved surfaces on the surface of the powder metallurgy part, the measuring jaws of the caliper cannot fully fit the surface, resulting in inaccurate measurement values, which has a greater impact on the accuracy of the measurement results. Moreover, for the detection data, multiple comparisons are required, and it is impossible to quickly know whether the detection results meet the range of the deformation degree, affecting the detection efficiency. Summary of the Invention

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

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A measurement device for thermal deformation of powder metallurgy parts includes a base, and further includes:

[0007] A rotation detection mechanism fixedly installed on one side of the upper end of the base;

[0008] A detection result feedback mechanism fixedly installed on the mobile end of the rotation detection mechanism;

[0009] A cleaning and processing mechanism is fixedly mounted on the rotation detection mechanism and is transmission-connected with the rotation detection mechanism;

[0010] 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;

[0011] 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;

[0012] 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.

[0013] 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.

[0014] 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.

[0015] In the above-mentioned measuring device for the thermal deformation of powder metallurgy parts, the cleaning mechanism includes a second speed increasing gearbox fixedly installed at the upper end of the L-shaped vertical plate. The input end of the second speed increasing gearbox is fixedly connected with a driven gear. The outer 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 with a cam. An extension plate is fixedly installed on one side of the L-shaped vertical plate. An air supply shell is fixedly installed at the upper end of the extension plate. An air supply piston is hermetically sleeved in the air supply shell. One side of the air supply piston is fixedly connected with a plurality of push-pull rods. The ends of the plurality of push-pull rods far away from the air supply piston penetrate out of the air supply shell and are fixedly connected with the same push-pull plate. The push-pull plate is located on one side of the cam. A plurality of return springs sleeved on the push-pull rods are fixedly connected between the push-pull plate and the air supply shell. The side of the air supply shell far away from the push-pull plate is fixedly communicated with a suction pipe and a blowing pipe. Both the suction pipe and the blowing pipe are elastic telescopic pipes, and one-way valves are installed on their pipe walls. The end of the suction pipe far away from the air supply shell is fixedly communicated with a suction head. The suction head is fixedly installed on the outer wall of the contact scraping plate. A filter shell is also installed on the suction pipe. A filter net plate is fixedly installed in the filter shell. The filter shell is fixedly installed at the upper end of the extension plate.

[0016] In the above-mentioned measuring device for the thermal deformation of powder metallurgy parts, the detection result quick comparison mechanism includes a comparison ring fixedly installed at the upper end of the base. An installation frame is also fixedly installed at the upper end of the base and is located above the comparison ring. A synchronous shaft coinciding with the central axis of the comparison ring is rotatably sleeved on the installation frame. A motor driving component for driving the synchronous shaft to rotate self is fixedly installed at the upper end of the installation frame. A fixed shell is fixedly installed at the lower end of the synchronous shaft. A plurality of jacks are symmetrically opened on one side of the fixed shell, and adjusting rods are movably inserted into the corresponding jacks. The ends of the plurality of adjusting rods located inside the fixed shell are fixedly connected with the same adjusting plate. A thrust permanent magnet plate is fixedly installed on the side of the adjusting plate far away from the adjusting rods. A thrust electromagnetic plate opposite to the thrust permanent magnet plate is fixedly installed on the inner wall of the fixed shell. The feedback conductive contact piece and the feedback resistance rod are connected in series in the power supply circuit of the thrust electromagnetic plate. The ends of the plurality of adjusting rods far away from the adjusting plate penetrate out of the fixed shell and are fixedly connected with the same L-shaped synchronous plate. A plurality of compensation springs sleeved on the adjusting rods are fixedly connected between the synchronous plate and the fixed shell. The lower end of the synchronous plate is fixedly installed with side plates located on both the inner and outer sides of the comparison ring. A trigger switch is fixedly installed on the side of the side plate close to the comparison ring.

[0017] In the above-mentioned measuring device for the thermal deformation of powder metallurgy parts, the detection result recording mechanism includes an annular mounting frame fixedly installed at the upper end of the mounting frame. Aluminum foil paper is fixedly installed at the upper end of the annular mounting frame. A horizontal plate is also fixedly sleeved on the upper end wall of the synchronous shaft. Two positioning cylinders are fixedly installed on the horizontal plate and are arranged on the inner and outer sides. A lifting piston is hermetically sleeved in the positioning cylinder. A puncture rod is fixedly connected to the lower end of the lifting piston. The lower end of the puncture rod penetrates and extends out of the lower end of the positioning cylinder. A pushing spring sleeved on the puncture rod is fixedly installed at the lower end of the lifting piston and the bottom of the inner wall of the positioning cylinder. The upper end of the positioning cylinder is fixedly communicated with a branch pipe communicated with the blowing pipe. A first electromagnetic valve is installed on the branch pipe. The rear end of the blowing pipe is fixedly communicated with a second electromagnetic valve.

[0018] In the above-mentioned measuring device for the thermal deformation of powder metallurgy parts, a limiting slider is fixedly installed on the outer wall of the transmission seat, and a limiting sliding groove matched with the limiting slider is opened on the inner wall of the feedback shell.

[0019] In the above-mentioned measuring device for the thermal deformation of powder metallurgy parts, a cleaning door is opened on the side wall of the filter shell, and the position of the cleaning door corresponds to the position of the filter mesh plate.

[0020] Compared with the existing technology, the beneficial effects of the present invention are as follows:

[0021] 1. Through the provided rotation detection mechanism, detection result feedback mechanism, and detection result quick comparison mechanism, the thermal deformation degree of powder metallurgy parts can be quickly detected, and the detection end can stably contact the metallurgy parts for detection. Compared with traditional contact measuring tools (such as calipers, micrometers, etc.), due to the irregular surface shape, the measuring tool cannot make good contact with the part surface, resulting in measurement errors. The detection accuracy is effectively improved, and the detection result can be directly compared with the standard value, so as to quickly obtain whether the thermal deformation degree of the powder metallurgy part exceeds the threshold, quickly obtain the detection result, and effectively improve the detection efficiency.

[0022] 2. Through the provided cleaning treatment mechanism, the rotation power during the detection process can be used to provide cleaning power for the surface of the powder metallurgy parts, realizing the action of cleaning while detecting, and effectively avoiding the problem that dust and impurities on the surface of the powder metallurgy parts affect the detection accuracy, and improving the detection quality.

[0023] 3. Through the provided detection result recording mechanism, when the thermal deformation degree of the powder metallurgy part is detected to exceed the threshold, the situation where the thermal deformation degree exceeds the threshold can be synchronously recorded, so as to provide better data processing for the staff subsequently, provide a basis for problem tracing, and enable the staff to quickly and accurately obtain the position where the thermal deformation of the metallurgy part exceeds the range, facilitating the subsequent tracing and processing by the staff. Brief Description of the Drawings

[0024] Figure 1 is a front sectional structural schematic diagram of the present invention;

[0025] Figure 2 is a structural schematic diagram of the rotation detection mechanism of the present invention;

[0026] Figure 3 is a sectional structural schematic diagram of the detection result feedback mechanism of the present invention;

[0027] Figure 4 is a sectional structural schematic diagram of the cleaning and processing mechanism of the present invention;

[0028] Figure 5 is a sectional structural schematic diagram of the detection result quick comparison mechanism of the present invention;

[0029] Figure 6 is a three-dimensional structural schematic diagram of the detection result recording mechanism of the present invention;

[0030] Figure 7 is a front sectional structural schematic diagram of the detection result recording mechanism of the present invention;

[0031] Figure 8 is Figure 7 a sectional structural schematic diagram of the positioning cylinder in

[0032] Figure 9 is a structural schematic diagram of the comparison ring of the present invention.

[0033] 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

[0034] 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.

[0035] like Figures 1-9 As shown, a device for measuring thermal deformation of a powder metallurgy part comprises a base 1 and also comprises:

[0036] 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.

[0037] 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.

[0038] The cleaning and processing mechanism 4 is fixedly installed on the rotation detection mechanism 2 and is in transmission connection with the rotation detection mechanism 2. The cleaning and processing mechanism 4 includes a second speed increasing gearbox 41 fixedly installed at the upper end of the L-shaped vertical plate 21. A driven gear 42 is fixedly connected to the input end of the second speed increasing gearbox 41. A driving gear 43 meshing with the driven gear 42 is fixedly sleeved on the shaft wall of the rotating shaft 22. A cam 44 is fixedly connected to the output end of the second speed increasing gearbox 41. An extension plate 45 is fixedly installed on one side of the L-shaped vertical plate 21. An air supply shell 46 is fixedly installed at the upper end of the extension plate 45. An air supply piston 47 is sealingly sleeved in the air supply shell 46. One side of the air supply piston 47 is fixedly connected with a plurality of push-pull rods 48. The ends of the plurality of push-pull rods 48 far away from the air supply piston 47 penetrate out of the air supply shell 46 and are 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 on the push-pull rods 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 communicated with the side of the air supply shell 46 far away from the push-pull plate 49. Both the suction pipe 411 and the blowing pipe 412 are elastic telescopic pipes, and one-way valves 413 are installed on the pipe walls. One end of the suction pipe 411 far away from the air supply shell 46 is fixedly communicated with a suction head 414. The suction head 414 is fixedly installed on the outer wall of the contact 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 at the upper end of the extension plate 45. A cleaning door is opened 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. It can provide cleaning power for the surface of the powder metallurgy part by using the rotation power during the detection process, realize the action of cleaning while detecting, and thus effectively avoid the problem that the dust and impurities on the surface of the powder metallurgy part affect the detection accuracy and improve the detection quality.

[0039] The rapid comparison mechanism 5 for detection results is fixedly installed on the other side of the upper end of the base 1 and is electrically connected to the detection result feedback mechanism 3. The rapid comparison mechanism 5 for detection results includes a comparison ring 51 fixedly installed on the upper end of the base 1. An installation frame 52 is also fixedly installed on the upper end of the base 1 and is located above the comparison ring 51. A synchronous shaft 53 whose central axis coincides with that of the comparison ring 51 is rotatably sleeved on the installation frame 52. A motor drive assembly 54 for driving the synchronous shaft 53 to rotate self is fixedly installed on the upper end of the installation frame 52. A fixed shell 55 is fixedly installed at the lower end of the synchronous shaft 53. A plurality of jacks are symmetrically opened on one side of the fixed shell 55, and adjusting rods 56 are movably inserted into the corresponding jacks. One ends of the plurality of adjusting rods 56 located inside the fixed shell 55 are fixedly connected to the same adjusting plate 57. A thrust permanent magnet plate 58 is fixedly installed on the side of the adjusting plate 57 away from the adjusting rods 56. A thrust electromagnetic plate 59 is fixedly installed on the inner wall of the fixed shell 55 and is arranged opposite to the thrust permanent magnet plate 58. The feedback conductive contact piece 38 and the feedback resistance rod 37 are connected in series in the power supply circuit of the thrust electromagnetic plate 59. One ends of the plurality of adjusting rods 56 away from the adjusting plate 57 penetrate out of the fixed shell 55 and are fixedly connected to the same synchronous plate 510 with an L-shaped structure. A plurality of compensation springs 511 sleeved on the adjusting rods 56 are fixedly connected between the synchronous plate 510 and the fixed shell 55. A side plate 512 located inside and outside the comparison ring 51 is fixedly installed at the lower end of the synchronous plate 510. 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 detection result with the standard value, and then can quickly obtain whether the thermal deformation degree of the powder metallurgy part exceeds the threshold, quickly obtain the detection result, and effectively improve the detection efficiency.

[0040] The detection result recording mechanism 6 is fixedly installed at the upper end of the detection result quick comparison mechanism 5 and is communicatively connected with the cleaning and processing mechanism 4. The detection result recording mechanism 6 includes an annular mounting frame 61 fixedly installed at the upper end of the mounting frame 52. An aluminum foil 62 is fixedly installed at the upper end of the annular mounting frame 61. A transverse plate 63 is also fixedly sleeved on the upper end wall of the synchronous shaft 53. Two positioning cylinders 64 are fixedly installed on the transverse plate 63 and are arranged on the inner and outer sides. A lifting piston 65 is hermetically sleeved 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 penetrates and extends out of the lower end of the positioning cylinder 64. A top push spring 67 sleeved on the puncture rod 66 is fixedly installed at the lower end of the lifting piston 65 and the bottom of the inner wall of the positioning cylinder 64. The upper end of the positioning cylinder 64 is fixedly communicated with a branch pipe 68 communicatively connected with the blowing pipe 412. A first electromagnetic valve 69 is installed on the branch pipe 68. A second electromagnetic valve 610 is fixedly communicated with the rear end of the blowing pipe 412. When it is detected that the thermal deformation degree of the powder metallurgy part exceeds the threshold value, the situation where the thermal deformation degree exceeds the threshold value can be synchronously recorded, so as to provide subsequent better processed data for the staff, provide a basis for problem tracing, and enable the staff to quickly and accurately obtain the position where the thermal deformation of the metallurgy part exceeds the range, facilitating the subsequent tracing and processing by the staff.

[0041] The PLC controller 7 is fixedly installed at the upper end of the base 1 and is electrically controlled and connected to the rotation detection mechanism 2, the detection result feedback mechanism 3, the cleaning and processing mechanism 4, the detection result quick comparison mechanism 5, and the detection result recording mechanism 6 respectively.

[0042] Now, the operating principle of the present invention is described as follows: The powder metallurgy part to be detected is fixed on the upper end of the base 1 through a fixture. At this time, the contact scraping plate 26 abuts against the powder metallurgy part under the action of the extrusion spring 28. The fixture involved here can be a mechanical fixture or a magnetic fixture. The mechanical fixture can be selected as a vise fixture or a chuck fixture according to requirements;

[0043] The PLC controller 7 controls the operation of the rotary motor 23. The rotary motor 23 drives the contact 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. Through the meshing of the driving gear 43 and the driven gear 42, the input end of the second speed increasing gearbox 41 is driven to rotate synchronously, and then the cam 44 is driven 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 and push the air supply piston 47 to move in the air supply housing 46, and discharge the air in the air supply housing 46 through the blowing pipe 412. When the protruding part of the cam 44 leaves the push-pull plate 49, under the action of the return spring 410, the air supply piston 47 moves back, and then a negative pressure suction force is formed in the air supply housing 46, which cooperates with the suction pipe 411 to provide negative pressure suction for the suction head 414. Then, the dust and impurities on the surface of the powder metallurgy part are quickly adsorbed and processed on the front side of the movement of the contact scraper 26, and the dust and impurities are intercepted by the filter screen plate 416 in the filter housing 415, providing a better environment for the detection of the surface thermal deformation degree of the powder metallurgy part. Moreover, the detected rotational driving force is used as the cleaning power, saving energy and being easy to control;

[0044] 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;

[0045] On the contrary, when the contact squeegee 26 detects that the surface of the powder metallurgy part is sunken due to thermal deformation, at this time, the position of the contact squeegee 26 will move further downward relative to the position in the standard detection state, thereby making the position of the feedback conductive tab 38 on the feedback resistance rod 37 more forward, making the access resistance value of the feedback resistance rod 37 relatively larger, and then making the position of the synchronization plate 510 relatively rearward, which will cause the outer trigger switch 513 to be pressed and triggered by the comparison ring 51. At this time, the PLC controller 7 will control the first solenoid valve 69 on the outer branch pipe 68 to open and the second solenoid valve 610 on the blowing pipe 412 to close, and repeat the above work to complete the marking work. The existence of the marked hole can feedback that the thermal deformation degree of the powder metallurgy part is unqualified, and the marking on both the inner and outer sides can quickly feedback whether it is an outward convex or inward concave situation, which is convenient for the subsequent feedback processing of the staff.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall 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), the rotation detection mechanism (2) comprising an L-shaped vertical plate (21) fixedly mounted on the upper end of the base (1), the horizontal portion of the L-shaped vertical plate (21) being 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), and a resisting scraper (26) is provided at the lower end of the supporting plate (25); A detection result feedback mechanism (3) is fixedly mounted on the moving end of the rotation detection mechanism (2), the detection result feedback mechanism (3) comprising 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 support 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 support plate (25), an input end of the first speed-increasing gear box (34) fixedly connected to a transmission gear (35) meshing with the transmission rack (31); 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), the cleaning and processing mechanism (4) comprising 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) being fixedly connected to a driven gear (42), the shaft wall of the rotating shaft (22) being fixedly sleeved with a driving gear (43) meshing with the driven gear (42), the output end of the second speed-increasing gearbox (41) being fixedly connected to a cam (44), an extension plate (45) being fixedly mounted on one side of the L-shaped vertical plate (21), an air supply shell (46) being fixedly mounted on the upper end of the extension plate (45), and an air supply piston (47) being provided in a sealing sleeve inside the air supply shell (46); 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). 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 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 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), wherein the detection result recording mechanism (6) comprises an annular mounting frame (61) fixedly mounted on the upper end of the mounting frame (52), and an aluminum foil (62) is fixedly mounted on the upper end of the annular mounting frame (61); 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: Two guide rods (27) are symmetrically fixedly connected to the upper end of the abutting scraper (26), and the upper ends of the guide rods (27) penetrate the upper end of the rotating plate (24). Two squeezing springs (28) sleeved outside the guide rods (27) are fixedly connected between the abutting 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: One end of the transmission screw (33) extends through 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. A device for measuring thermal deformation of powder metallurgy parts according to claim 3, characterized in that: 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 on the outside of the push-pull rods (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 to the side of the air supply shell (46) away from the push-pull plate (49). 12), the suction pipe (411) and the blowing pipe (412) are both elastic telescopic pipes, and both are provided with one-way valves (413) on the pipe walls; 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: A fixed shell (55) is fixedly mounted on the lower end of the synchronization shaft (53), a plurality of jacks are symmetrically opened on one side of the fixed shell (55), and an adjustment rod (56) is movably inserted into the corresponding jacks, one end of the plurality of adjustment rods (56) located in the fixed shell (55) is fixedly connected to the same adjustment plate (57), a thrust permanent magnet plate (58) is fixedly mounted on the side of the adjustment plate (57) away from the adjustment rod (56), 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), and the feedback conductive contact piece (38) and the feedback resistor rod (3 7) connected in series to the power supply circuit of the thrust electromagnetic plate (59), the ends of the plurality of adjusting rods (56) away from the adjusting plate (57) extend through 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 adjusting 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 installed at 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).

6. The device for measuring thermal deformation of powder metallurgy parts according to claim 5, characterized in that: The upper end shaft wall of the synchronization shaft (53) is also fixedly sleeved with a transverse plate (63), and two positioning cylinders (64) arranged on the inner and outer sides are fixedly installed on the transverse plate (63). The sealing sleeve inside the positioning cylinder (64) is provided with a lifting piston (65), and the lower end of the lifting piston (65) is fixedly connected to a piercing rod (66), and the lower end of the piercing rod (66) extends through the lower end of the positioning cylinder (64). A push spring (67) sleeved on the outside of the piercing rod (66) is fixedly installed at the lower end of the lifting piston (65) and the bottom of the inner wall of the positioning cylinder (64). The upper end of the positioning cylinder (64) is fixedly connected to a branch pipe (68) connected to the blow pipe (412), and a first electromagnetic valve (69) is installed on the branch pipe (68). The rear end of the blow pipe (412) is fixedly connected to a second electromagnetic 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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