Cylinder cover inner hole parameter detection device

Abstract

The utility model provides a cylinder cover inner hole parameter detection device, and relates to the technical field of cylinder cover detection. The cylinder cover inner hole parameter detection device comprises a measuring instrument, a sensor, a driving assembly, a pressing anti-rotation assembly and a controller. The measuring instrument is used for placing the cylinder cover; the sensor is connected with the measuring instrument. The sensor comprises a first sensor and a second sensor; the first sensor is used for detecting the inner hole diameter of the cylinder cover, and the second sensor is used for detecting the inner hole perpendicularity of the cylinder cover. One of the driving assembly and the pressing anti-rotation assembly is connected with the measuring instrument, and the other one is used for being connected with the cylinder cover, so that relative rotation of the cylinder cover and the measuring instrument is achieved. The sensor is in communication connection with the controller. The controller is used for receiving the detection parameters of the sensor and obtaining the inner diameter, cylindricity, perpendicularity and roundness error value of the cylinder cover according to the detection parameters. And the detection efficiency and the detection precision of the cylinder cover can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder head detection, and more specifically, to a detection device for inner hole parameters of a cylinder head. Background Art

[0002] Most of the existing cylinder head detection methods are manual detection. Workers place the cylinder head on the measuring instrument and manually rotate the cylinder head to avoid the oil groove of the inner hole of the cylinder head being at the detection point. The number of detection points is limited and the efficiency is low. The labor intensity of workers is high, and the judgment of the detection results is greatly affected by subjective human factors and operation experience. Summary of the Utility Model

[0003] The objectives of the present utility model include, for example, providing a detection device for inner hole parameters of a cylinder head, which can improve the detection efficiency and detection accuracy.

[0004] The embodiments of the present utility model can be implemented as follows:

[0005] The present utility model provides a detection device for inner hole parameters of a cylinder head, including:

[0006] A measuring instrument for placing the cylinder head;

[0007] A sensor connected to the measuring instrument; the sensor includes a first sensor and a second sensor; the first sensor is used to detect the inner hole diameter of the cylinder head, and the second sensor is used to detect the perpendicularity of the inner hole of the cylinder head;

[0008] A driving component and a pressing and anti-rotation component, in which one of the driving component and the pressing and anti-rotation component is connected to the measuring instrument, and the other is used to be connected to the cylinder head, so that the cylinder head and the measuring instrument can rotate relatively;

[0009] A controller, the sensor is communicatively connected to the controller; the controller is used to receive the detection parameters of the sensor and obtain the inner diameter, cylindricity, perpendicularity and roundness error values of the cylinder head according to the detection parameters.

[0010] In an optional embodiment, the measuring instrument includes a connected base and a column, the base is provided with a bearing surface for placing the cylinder head, and the inner hole of the cylinder head is used to sleeve on the column;

[0011] The column is provided with a first air blowing channel and a second air blowing channel;

[0012] The first blowing channel includes two first air outlets located at the same height. The second blowing channel includes two second air outlets located at the same height. The first air outlets and the second air outlets are located on the same vertical line and are spaced apart. Both the first air outlets and the second air outlets are located in the inner hole of the cylinder head.

[0013] The first sensor includes two inner diameter detectors. One of the inner diameter detectors is arranged on the first blowing channel, and the other inner diameter detector is arranged on the second blowing channel.

[0014] In an alternative embodiment, a third blowing channel and a fourth blowing channel are provided on the column.

[0015] The third blowing channel includes two third air outlets located at different heights. The fourth blowing channel includes two fourth air outlets located at different heights. Both the third air outlets and the fourth air outlets are located in the inner hole of the cylinder head.

[0016] The second sensor includes two perpendicularity detectors. One of the perpendicularity detectors is arranged on the third blowing channel, and the other perpendicularity detector is arranged on the fourth blowing channel.

[0017] In an alternative embodiment, the sensor further includes an airtightness detector. The measuring instrument is provided with a fifth blowing channel, and the fifth air outlet of the fifth blowing channel is arranged on the bearing surface. The airtightness detector is arranged on the fifth blowing channel.

[0018] In an alternative embodiment, a protrusion is provided on the surface of the base, and the surface of the protrusion serves as the bearing surface. The opening end face of the fifth air outlet is flush with the surface of the protrusion.

[0019] In an alternative embodiment, a workpiece stage is further included. The workpiece stage includes a first placement table and a second placement table that can move relative to each other. The first placement table and the second placement table move relatively closer to a closed state to carry the cylinder head. There is a through hole between the first placement table and the second placement table for the column to pass through.

[0020] The measuring instrument can move up and down relative to the workpiece stage so that the column passes through the through hole, and the bearing surface supports the cylinder head and separates the cylinder head from the workpiece stage.

[0021] In an alternative embodiment, a relief groove for avoiding the workpiece stage is provided on the base of the measuring instrument.

[0022] In an alternative embodiment, an inductor is further included. The inductor is used to detect whether the cylinder head is placed on the workpiece stage.

[0023] In an alternative embodiment, the pressing and anti-rotation assembly includes a pressing block, and a limiting post is provided on the pressing block;

[0024] And / or, a plurality of support posts are arranged on the pressing block along the circumferential direction, and a buffer spring is provided on the support post.

[0025] In an alternative embodiment, a cleaning assembly is further included, and the cleaning assembly is used to purge the measuring instrument.

[0026] The beneficial effects of the embodiments of the present utility model include, for example:

[0027] The cylinder head inner hole parameter detection device provided by the embodiments of the present utility model adds a second sensor for detecting the perpendicularity of the inner hole of the cylinder head, which can detect the perpendicularity of the inner hole, and has higher detection accuracy. Automated detection is adopted, and the relative rotation of the cylinder head and the measuring instrument is realized through the driving assembly and the pressing and anti-rotation assembly. The detection points are easy to control and select, the efficiency of automatic detection is higher, the detection points are more widely covered, the detection result accuracy is higher, and missed detections are prevented. Moreover, a controller can be used to set a unified detection result evaluation standard, and the evaluation standard is objective and consistent in batch detection, avoiding the influence of human subjective factors. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of the cylinder head inner hole parameter detection device provided by the embodiments of the present utility model;

[0030] Figure 2 It is a schematic structural diagram of the cylinder head inner hole parameter detection device from another perspective provided by the embodiments of the present utility model;

[0031] Figure 3 It is a schematic structural diagram of the measuring instrument of the cylinder head inner hole parameter detection device provided by the embodiments of the present utility model;

[0032] Figure 4 It is a schematic structural diagram of the first air blowing channel of the cylinder head inner hole parameter detection device provided by the embodiments of the present utility model;

[0033] Figure 5 It is a schematic structural diagram of the second air blowing channel of the cylinder head inner hole parameter detection device provided by the embodiments of the present utility model;

[0034] Figure 6Schematic diagram of the structure of the third air blowing channel in the cylinder head inner hole parameter detection device provided by the embodiment of the present invention;

[0035] Figure 7 Schematic diagram of the structure of the fourth air blowing channel in the cylinder head inner hole parameter detection device provided by the embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the structure of the workpiece carrier table of the cylinder head inner hole parameter detection device provided by the embodiment of the present invention;

[0037] Figure 9 Schematic diagram of the structure of the pressing block of the cylinder head inner hole parameter detection device provided by the embodiment of the present invention.

[0038] Icon: 100 - Cylinder head inner hole parameter detection device; 101 - Frame; 110 - Measuring instrument; 111 - Base; 112 - Column; 113 - Protrusion; 114 - Bearing surface; 115 - Relief groove; 121 - First air flow port; 122 - Second air flow port; 123 - Third air flow port; 124 - Fourth air flow port; 125 - Fifth air flow port; 130 - Driving assembly; 140 - Pressing and anti - rotation assembly; 141 - Pressing block; 142 - Limit post; 143 - Support post; 150 - Workpiece carrier table; 151 - First placement table; 152 - Second placement table; 153 - Connection part; 154 - Support bump; 155 - Telescopic cylinder; 160 - Lifting assembly; 170 - Cleaning assembly; 180 - Calibration gauge; 200 - Cylinder head. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0041] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0043] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0044] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.

[0045] Please refer to Figures 1 to 3 , this embodiment provides a cylinder head inner hole parameter detection device 100, which is used to detect the inner hole size of the cylinder head of the compressor, so as to separate qualified products and defective products on the production line.

[0046] The cylinder head inner hole parameter detection device 100 includes a frame 101 and a measuring instrument 110, a sensor, a driving component 130, a pressing and anti-rotation component 140 and a controller arranged on the frame 101. The measuring instrument 110 is used to place the cylinder head; the sensor is connected to the measuring instrument 110. The sensor includes a first sensor and a second sensor; the first sensor is used to detect the inner hole diameter of the cylinder head, and the second sensor is used to detect the inner hole perpendicularity of the cylinder head. Among the driving component 130 and the pressing and anti-rotation component 140, one is connected to the measuring instrument 110, and the other is used to connect to the cylinder head, so that the cylinder head and the measuring instrument 110 can rotate relative to each other. The sensor is communicatively connected to the controller. The controller is used to receive the detection parameters of the sensor and obtain the inner diameter, cylindricity, perpendicularity, roundness and roundness error value of the cylinder head according to the detection parameters. This is beneficial to improving the detection efficiency and detection accuracy of the cylinder head.

[0047] The measuring instrument 110 includes a connected base 111 and a column 112. The base 111 is provided with a bearing surface 114 for placing the cylinder head, and the inner hole of the cylinder head is used to sleeved on the column 112. It can be understood that the bottom surface of the cylinder head contacts the bearing surface 114, and the column 112 passes through the inner hole of the cylinder head. The outer diameter of the column 112 is approximately equal to the inner hole diameter of the cylinder head, and the gap between the two is less than 0.05 mm, such as 0.01 mm, 0.02 mm, 0.03 mm or 0.04 mm. The measuring instrument 110 adopts an air electrical measuring instrument.

[0048] Figures 4 to 7 The direction of the arrow in is the air flow direction of the blowing channel. Combining Figure 4 and Figure 5, Optionally, the column 112 is provided with a first blowing channel and a second blowing channel. The first blowing channel includes two first air outlets 121 at the same height, and the second blowing channel includes two second air outlets 122 at the same height. The first air outlets 121 and the second air outlets 122 are located on the same vertical line and are spaced apart. Both the first air outlets 121 and the second air outlets 122 are located in the inner hole of the cylinder head 200. The first sensor includes two inner diameter detectors, one of which is arranged on the first blowing channel and the other is arranged on the second blowing channel.

[0049] It can be understood that the detection principle is generally as follows: gases are blown out from the first air outlets 121 and the second air outlets 122 respectively, and the gases are blocked by the hole wall of the inner hole of the cylinder head 200 to generate air flow fluctuations. The inner diameter detectors can detect the fluctuation signals of the air flow and send them to the controller, and the controller converts the received fluctuation signals into the aperture size. Since the first air outlets 121 and the second air outlets 122 are arranged one above the other, the second air outlet 122 is directly below the first air outlet 121. The two inner diameter detectors detect the inner diameters of two different cross-sections, that is, the inner diameter of the first cross-section and the inner diameter of the second cross-section. Of course, in some embodiments, the second air outlet 122 is not necessarily directly below the first air outlet 121. As long as it is ensured that the two first air outlets 121 are located on the same cross-section and the two second air outlets 122 are located on the same cross-section. Optionally, the two first air outlets 121 are symmetrically distributed, and the two second air outlets 122 are symmetrically distributed.

[0050] Combined Figure 6 and Figure 7 , Optionally, the column 112 is further provided with a third blowing channel and a fourth blowing channel. The third blowing channel includes two third air outlets 123 at different heights, and the fourth blowing channel includes two fourth air outlets 124 at different heights. The third air outlets 123 and the fourth air outlets 124 are located on the same vertical line and are spaced apart. Both the third air outlets 123 and the fourth air outlets 124 are located in the inner hole of the cylinder head 200. The second sensor includes two perpendicularity detectors, one of which is arranged on the third blowing channel and the other is arranged on the fourth blowing channel.

[0051] The third air outlets 123 and the first air outlets 121 are spaced apart in the circumferential direction. The fourth air outlets 124 and the second air outlets 122 are spaced apart in the circumferential direction. The third air outlets 123 and the first air outlets 121 may be located on the same cross-section or on different cross-sections. The fourth air outlets 124 and the second air outlets 122 may be located on the same cross-section or on different cross-sections. No specific limitation is made here.

[0052] It should be noted that the third air outlet 123 above in the third air blowing channel and the fourth air outlet 124 above in the fourth air blowing channel can be at the same height or at different heights. The third air outlet 123 below in the third air blowing channel and the fourth air outlet 124 below in the fourth air blowing channel can be at the same height or at different heights. Optionally, the blowing directions of the two third air outlets 123 can be the same or different. In this embodiment, the blowing directions of the two third air outlets 123 are opposite. Similarly, the blowing directions of the two fourth air outlets 124 can be the same or different. In this embodiment, the blowing directions of the two fourth air outlets 124 are opposite.

[0053] The four air blowing channels can supply air independently without interference. Of course, it can also be four different branches divided from a main air path, which is not specifically limited here. In this embodiment, there are four sensors, which are respectively arranged in the four air blowing detection channels. The first sensor includes two inner diameter detectors, one of which is arranged on the first air blowing channel and the other is arranged on the second air blowing channel. The two first sensors are used to detect the inner hole diameter of the cylinder head. The second sensor includes two perpendicularity detectors, one of which is arranged on the third air blowing channel and the other is arranged on the fourth air blowing channel. The two second sensors are used to detect the inner hole perpendicularity of the cylinder head.

[0054] In this embodiment, the pressing and anti-rotation assembly 140 is connected to the cylinder head to fix the cylinder head stationary during the detection. The driving assembly 130 is connected to the measuring instrument 110 to drive the column 112 to rotate in the inner hole. During the detection process, the first sensor and the second sensor can detect synchronously, and the detection efficiency is high. The controller controls the column 112 to rotate 0.5 degrees each time, and the first sensor and the second sensor collect a set of data until the column 112 rotates 180 degrees. The first sensor and the second sensor respectively collect 360 sets of data to complete the detection of one cylinder head. Of course, it can also be that the column 112 rotates 360 degrees throughout the process and data is collected once every 1 degree. Or the column 112 rotates 200 degrees throughout the process and data is collected once every 0.5 degrees. Among them, the full rotation angle and the interval angle of data collection can be flexibly set according to the actual situation, which is not specifically limited here.

[0055] Of course, in some embodiments, it can also be that the driving assembly 130 drives the cylinder head to rotate, and the pressing and anti-rotation assembly 140 fixes the measuring instrument 110 stationary to realize data collection during their relative rotation.

[0056] Combined with Figure 8, Optionally, the cylinder head inner hole parameter detection device 100 further includes a workpiece stage 150. The workpiece stage 150 includes a first placement table 151 and a second placement table 152 that can move relative to each other. The first placement table 151 and the second placement table 152 move relatively closer to a closed state to carry the cylinder head. There is a through hole between the first placement table 151 and the second placement table 152 for the column 112 of the measuring instrument 110 to pass through.

[0057] The workpiece stage 150 is connected to a telescopic cylinder 155. The telescopic cylinder 155 can drive the first placement table 151 and the second placement table 152 to approach or move away from each other. The first placement table 151 and the second placement table 152 are close to each other in a closed state. The first placement table 151 and the second placement table 152 are away from each other in an open state.

[0058] The first placement table 151 and the second placement table 152 respectively include a connecting portion 153 and a supporting bump 154. There are two opposite supporting bumps 154 provided on each connecting portion 153. The supporting bumps 154 on the two connecting portions 153 are arranged oppositely. In the closed state, the four supporting bumps 154 form a through hole for the measuring instrument 110 to lift and lower. When the cylinder head is placed on the workpiece stage 150. The four supporting bumps 154 play a main bearing role for the cylinder head. Such a setting can reduce the contact area between the cylinder head and the workpiece stage 150, and further reduce the friction and wear of the bottom surface of the cylinder head.

[0059] The measuring instrument 110 can move up and down relative to the workpiece stage 150 so that the column 112 passes through the through hole between the first placement table 151 and the second placement table 152, and the bearing surface 114 supports the cylinder head and separates the cylinder head from the workpiece stage 150. It is easy to understand that in the initial state, the measuring instrument 110 is located below the workpiece stage 150. When the first placement table 151 and the second placement table 152 are in the closed state, the cylinder head is placed on the first placement table 151 and the second placement table 152. At this time, the bottom surface of the cylinder head contacts the supporting bumps 154 of the first placement table 151 and the second placement table 152 respectively.

[0060] Optionally, the measuring instrument 110 is connected to a lifting assembly 160. The lifting assembly 160 includes a lifting motor or a lifting cylinder. After the cylinder head is placed on the workpiece stage 150, the lifting cylinder or the lifting motor drives the measuring instrument 110 to rise. The column 112 passes through the through hole between the first placement table 151 and the second placement table 152 until the upper surface of the base 111 of the measuring instrument 110 contacts the bottom surface of the cylinder head. And the measuring instrument 110 continues to rise to lift the cylinder head by a certain distance. At this time, the cylinder head is separated from the workpiece stage 150. Optionally, the separation distance between the cylinder head and the workpiece stage 150 is about 1 mm.

[0061] Optionally, the sensor further includes an airtightness detector. The airtightness detector is connected to the controller. The airtightness detector is used to detect the fit between the bottom surface of the cylinder head and the bearing surface 114 of the base 111. The measuring instrument 110 is provided with a fifth air blowing channel, and the fifth air outlet 125 of the fifth air blowing channel is arranged on the bearing surface 114; the airtightness detector is arranged on the fifth air blowing channel. It can be understood that when the measuring instrument 110 jacks up the cylinder head, the bottom surface of the cylinder head presses on the fifth air outlet 125. When gas is introduced into the fifth air blowing channel, if the air pressure decreases and there is air leakage, it indicates that the fit between the bearing surface 114 and the cylinder head is poor. On the contrary, if the air pressure remains almost unchanged, it indicates that the bearing surface 114 and the bottom surface of the cylinder head fit well. It can be understood that the bearing surface 114 of the base 111 serves as the reference surface for measurement. If the fit is good, it can improve the measurement accuracy of the inner diameter, cylindricity, perpendicularity, etc. of the inner hole of the cylinder head.

[0062] In this embodiment, the surface of the base 111 of the measuring instrument 110 is provided with a plurality of spaced protrusions 113, and the surface of the protrusions 113 serves as the bearing surface 114. That is, after the measuring instrument 110 rises, it is the protrusions 113 that contact the bottom surface of the cylinder head. The opening end face of the fifth air outlet 125 is flush with the surface of the protrusions 113. Optionally, there are a plurality of fifth air outlets 125, which are 4 in this embodiment and are evenly spaced along the circumferential direction. It can be understood that the fifth air outlets 125 can be arranged on the protrusions 113 or on the surface of the base 111. As long as the opening end face of the fifth air outlet 125 is flush with the surface of the protrusions 113. Such a setting can reduce the contact area between the cylinder head and the base 111, thereby reducing the friction and wear on the bottom surface of the cylinder head, and is also beneficial to improving the airtightness detection accuracy.

[0063] Optionally, a relief groove 115 for avoiding the workpiece carrier 150 is provided on the base 111 of the measuring instrument 110. In this embodiment, the shape and size of the relief groove 115 are adapted to the shape and size of the support lug 154. The position of the relief groove 115 corresponds to the position of the support lug 154. Such a setting ensures that there is no interference with the workpiece carrier 150 during the process of the measuring instrument 110 rising to jack up the cylinder head.

[0064] The driving assembly 130 includes a rotary cylinder. The rotary cylinder is connected to the measuring instrument 110. The rotary cylinder is used to drive the measuring instrument 110 to rotate. It can be understood that the rotary cylinder can only drive the column 112 to rotate in the inner hole of the cylinder head. Or, the rotary cylinder can drive the base 111 and the column 112 to rotate together. In this embodiment, during the detection process, the base 111 and the column 112 rotate together.

[0065] Optionally, the cylinder head inner hole parameter detection device 100 further includes a sensor (not shown in the figure), which is used to detect whether a cylinder head is placed on the workpiece stage 150. The sensor can be provided on the workpiece stage 150 or at any position of the frame 101, as long as it can detect the presence of the cylinder head. The types of sensors include, but are not limited to, gravity sensors, light sensors, or laser detectors, etc.

[0066] It should be noted that the sensor is connected to the controller. When the sensor senses that the cylinder head is placed on the workpiece stage 150, the controller controls the measuring instrument 110 to rise and lift the cylinder head. After the cylinder head is lifted and separated from the workpiece stage 150, the controller controls the telescopic cylinder 155 to drive the first placement stage 151 and the second placement stage 152 to separate from each other, so that the workpiece stage 150 moves away from the measuring instrument 110. In this way, when the measuring instrument 110 rotates subsequently, it will not interfere with the workpiece stage 150.

[0067] It is worth noting that in this embodiment, the workpiece stage 150 is provided. First, the cylinder head is placed on the workpiece stage 150, and then the measuring instrument 110 is moved to lift the cylinder head. This setting can reduce the wear of the measuring instrument 110 and the cylinder head compared with directly placing the cylinder head on the measuring instrument 110, reduce the collision risk between the column 112 of the measuring instrument 110 and the cylinder head, protect the measuring instrument 110, extend the service life of the measuring instrument 110, and prevent the problem of reduced measurement accuracy caused by damage to the measuring instrument 110. In addition, since the gap between the column 112 of the measuring instrument 110 and the inner hole of the cylinder head is very small, about 0.02 mm. If the cylinder head is directly placed on the measuring instrument 110, the positioning accuracy requirements for the manipulator grasping the cylinder head are very high, and the operation difficulty is great. After the workpiece stage 150 is provided in this embodiment, the operation difficulty is greatly reduced, the operation efficiency is improved, which is beneficial to improving the detection accuracy and detection efficiency, and protecting the measuring instrument 110.

[0068] Combined with Figure 9 , optionally, the pressing and anti-rotation assembly 140 includes a pressing block 141, and a limiting column 142 is provided on the pressing block 141. The limiting column 142 is used to insert into the positioning hole of the cylinder head to prevent the cylinder head from rotating. The pressing block 141 can be connected to a force-applying component such as a cylinder. Optionally, a number of support columns 143 are arranged along the circumferential direction of the pressing block 141, and buffer springs are provided on the support columns 143. In this embodiment, three support columns 143 are provided, and the pressing block 141 is located above the cylinder head and can apply a downward pressure to the cylinder head. The three support columns 143 are spaced apart along the circumferential direction, so that the cylinder head is more evenly stressed. A buffer spring, such as a compression spring, is provided at one end of each support column 143 close to the cylinder head, which can play a buffering role during the force application process and reduce the impact wear on the cylinder head.

[0069] Optionally, the briquetting block 141 is connected with a rotary cylinder and a telescopic cylinder. The telescopic cylinder is used to apply a downward pressure to the briquetting block 141 to press the cylinder head tightly to prevent the cylinder head from rotating during the detection process. The rotary cylinder is used to adjust the angle of the briquetting block 141 to change the relative position between the briquetting block 141 and the cylinder head. It is easy to understand that when it is necessary to press the cylinder head tightly, the rotary cylinder drives the briquetting block 141 to rotate directly above the cylinder head. When it is necessary to remove the cylinder head after the detection is completed, the briquetting block 141 can be rotated to the side first to facilitate the picking and placing of the cylinder head.

[0070] Optionally, the cylinder head inner hole parameter detection device 100 further includes a display screen, a cleaning assembly 170, and a calibration gauge 180. The display screen is connected to the controller and is used to output and display the detection results on the display screen, so as to facilitate the operator to master the detection results. The specific output values of the detection parameters, such as the inner diameter size, cylindricity, perpendicularity, and roundness error, can be displayed on the display screen. Information such as the model number and serial number of the detected cylinder head, whether the detection result is qualified or unqualified, and if it is unqualified, where the cylinder head should be moved correspondingly can also be displayed.

[0071] The cleaning assembly 170 includes a blowing nozzle, which is used to clean the dust, impurities, or liquid on the tabletop, including but not limited to blowing the bottom surface of the cylinder head, the tabletop of the workpiece carrier 150, the column 112 and the base 111 of the measuring instrument 110, etc. This can reduce the wear of the tabletop impurities on the bottom surface of the cylinder head and the impact on the detection accuracy.

[0072] The calibration gauge 180 is used to calibrate the measuring instrument 110. It can be calibrated once after the number of detected cylinder heads reaches a certain value. Or, it can be calibrated once when the detection duration of the measuring instrument 110 reaches a certain value. Optionally, the measuring instrument 110 is calibrated with the calibration gauge 180 after every 100 cylinder heads are detected. Or, the measuring instrument 110 is calibrated with the calibration gauge 180 every 30 minutes after detection.

[0073] The controller can use a general-purpose processor, including but not limited to a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), etc.; it can also be a digital signal processor (Digital Signal Processor, abbreviated as DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), a field-programmable gate array (Field-Programmable Gate Array, abbreviated as FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Of course, the controller can also be integrated into a PLC controller, a single-chip microcomputer, etc., which is not specifically limited here.

[0074] The detection principle of the inner hole parameter detection device provided by the embodiment of the utility model is as follows:

[0075] Move the cylinder head to the measuring instrument 110; detect the fit degree between the cylinder head and the measuring instrument 110. Control the measuring instrument 110 to start; control the relative rotation of the measuring instrument 110 and the cylinder head; in the state where the measuring instrument 110 and the cylinder head rotate relatively, obtain the detection parameters of the first sensor and the second sensor; obtain the inner diameter, cylindricity, perpendicularity and roundness error values of the cylinder head according to the detection parameters. Among them, the detection parameters of the first sensor and the second sensor are obtained once every 0.5 degrees of rotation of the measuring instrument 110 or the cylinder head; the detection is completed after the measuring instrument 110 or the cylinder head rotates 180 degrees.

[0076] Specifically, the cleaning component 170 first purges the tabletop. When the first placing table 151 and the second placing table 152 are in the closed state, the controller controls the manipulator to place the cylinder head on the workpiece carrier 150. After the inductor senses the cylinder head on the workpiece carrier 150, it sends a signal to the controller, and the controller controls the lifting motor or the lifting cylinder below the measuring instrument 110 to drive the measuring instrument 110 to rise until the measuring instrument 110 jacks up the cylinder head, so that the cylinder head is separated from the workpiece carrier 150 by about 1 mm. The controller controls the telescopic cylinder 155 connected to the workpiece carrier 150 to drive the first placing table 151 and the second placing table 152 to move away from each other and leave the working range of the measuring instrument 110 to prevent interference between the measuring instrument 110 and the workpiece carrier 150.

[0077] Detect the airtightness between the cylinder head and the base 111 of the measuring instrument 110 to ensure good fit between the cylinder head and the base 111. After the airtightness detection is qualified, the controller controls the pressure block 141 to rotate to the directly above the cylinder head, the pressure block 141 descends, and the limit post 142 on the pressure block 141 inserts into the positioning hole of the cylinder head. The pressure block 141 presses the upper end surface of the cylinder head through the column 112 to prevent the cylinder head from rotating.

[0078] The controller controls the rotary cylinder connected to the measuring instrument 110 to work, driving the base 111 and the column 112 to rotate together. Gas is introduced into the first air blowing channel, the second air blowing channel, the third air blowing channel and the fourth air blowing channel respectively. The column 112 rotates 180 degrees in total, and the first sensor and the second sensor collect data once every 0.5 degrees of rotation and send it to the controller. The controller obtains the measurement data of the sensor, and through data processing, calculation and analysis, displays the detection result on the display screen. And make a judgment according to the preset judgment rules, and feedback the result to the manipulator after the judgment is completed.

[0079] After the cylinder head inspection is completed, the pressing and anti-rotation assembly 140 removes the pressure on the cylinder head, and the pressing block 141 rises and rotates to the side. The workpiece carrier 150 moves to the closed state driven by the telescopic cylinder 155. The measuring instrument 110 descends. The cylinder head falls back onto the workpiece carrier 150 again. The manipulator takes out the cylinder head and moves it to the designated position according to the determination result of the controller. For example, if it is a qualified product, it enters the next process. After manual inspection of the appearance again, it is packed. If it is a non-conforming product, it is placed separately on the non-conforming material track for the next classification and determination.

[0080] The cleaning assembly 170 blows the table surface again to prepare for the inspection of the next cylinder head.

[0081] After the measuring instrument 110 inspects a certain number of cylinder heads for a certain period of time, the calibration gauge 180 is used to calibrate the measuring instrument 110 to improve the inspection accuracy.

[0082] It should be noted that in this embodiment, the determination method of each inner diameter parameter of the cylinder head inner hole is as follows:

[0083] (1) Determination of the output value of the inner diameter size:

[0084] In the first sensor, there are two inner diameter detectors. One detects the first inner diameter of the first cross-section of the inner hole and obtains 360 data at different points through rotation. The other detects the second inner diameter of the second cross-section of the inner hole and obtains 360 data. According to the set sampling points for inner diameter evaluation, the specified data is selected, and the final inner diameter output value can be the minimum value or the average value of the selected data. In this embodiment, the minimum value of the selected data is used as the inner diameter size output value.

[0085] (2) Determination of roundness and roundness error value:

[0086] The 360 data of the first inner diameter and the 360 data of the second inner diameter are respectively arranged in ascending order. According to the set sampling points for inner diameter evaluation, the specified data is selected, and the difference between the maximum value and the minimum value of the selected data is calculated. The difference between the maximum value and the minimum value of the selected data in the first inner diameter is used as the roundness of the first cross-section. The difference between the maximum value and the minimum value of the selected data in the second inner diameter is used as the roundness of the second cross-section. The larger value of the roundness of the first cross-section and the roundness of the second cross-section is used as the roundness output value of the inner hole. The absolute value of the difference between the roundness of the first cross-section and the roundness of the second cross-section is used as the roundness error value.

[0087] (3) Determination of cylindricity:

[0088] Based on 360 data of the first inner diameter and 360 data of the second inner diameter, calculate the difference between the first inner diameter and the second inner diameter at each point and take the absolute value, and arrange them in ascending order. Select the specified data according to the number of sampling points set for cylindricity evaluation, and find the maximum value among the selected data as the output value of the cylindricity of the inner hole.

[0089] (4) Determination of perpendicularity:

[0090] There are two calculation methods for perpendicularity:

[0091] The first method: In the second sensor, there are two perpendicularity detectors, and 360 groups of data at different points are obtained by rotation. One perpendicularity detector obtains the third inner diameter and the fourth inner diameter of the inner hole, and the other perpendicularity detector obtains the fifth inner diameter and the sixth inner diameter of the inner hole. Calculate the difference between the data detected by the two perpendicularity detectors in the third air blowing channel and the fourth air blowing channel and take the absolute value, and then take half of the absolute value (that is, divide the absolute value by 2) to obtain 360 calculated values. For example, divide the absolute value of the difference between the third inner diameter and the sixth inner diameter by 2, divide the absolute value of the difference between the fifth inner diameter and the fourth inner diameter by 2, and then arrange the 360 calculated values in ascending order. Select the specified data according to the number of sampling points set for perpendicularity evaluation, and take the maximum value among the selected data as the perpendicularity output value.

[0092] The second method: In the first sensor, there are two inner diameter detectors. One detects the first inner diameter of the first cross-section of the inner hole and obtains 360 groups of data by rotation. The other detects the second inner diameter of the second cross-section of the inner hole and obtains 360 groups of data. Add the first inner diameter and the second inner diameter at each point and divide by 2 to obtain 360 groups of average inner diameter values. At each point, subtract the 360 groups of data obtained by one perpendicularity detector from the 360 groups of average inner diameter values, and take the absolute value of the obtained difference to obtain 360 groups of calculated values. Select the specified calculated data according to the number of sampling points set for perpendicularity evaluation, and take the maximum value among the selected data as the perpendicularity output value.

[0093] It can be understood that since there is an oil groove in the inner hole of the cylinder head. Among the 360 data obtained by each sensor, it may include the detected values at the oil groove position. When calculating and outputting each parameter value, it is necessary to select the specified data for calculation and processing. The selected specified data is the effective data in the measurement, excluding the invalid data at the oil groove position, so the detection result is more accurate.

[0094] In summary, the cylinder head inner hole parameter detection device 100 provided by the embodiment of the present invention has the following beneficial effects, including:

[0095] The cylinder head inner hole parameter detection device 100 provided by the embodiment of the utility model adds a second sensor for detecting the verticality of the cylinder head inner hole, which can detect the verticality of the inner hole and has higher detection accuracy. Automated detection is adopted to realize the relative rotation of the cylinder head and the measuring instrument 110 through the driving component 130 and the clamping anti-rotation component 140. The detection points are easy to control, the efficiency of automatic detection is higher, the detection points cover a wider range, the detection results are more accurate, and missed detection is prevented. An airtight detection is provided to improve the placement accuracy of the cylinder head on the base 111, thereby improving the detection accuracy. In addition, a controller can be used to set a unified test result evaluation standard, and the evaluation standard is objective and consistent in batch detection, avoiding the influence of human subjective factors.

[0096] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An inner hole parameter detection device for a cylinder head, characterized in that, Including: A measuring instrument for placing a cylinder head; A sensor connected to the measuring instrument; the sensor includes a first sensor and a second sensor; the first sensor is used to detect the inner hole diameter of the cylinder head, and the second sensor is used to detect the perpendicularity of the inner hole of the cylinder head; A driving assembly and a pressing and anti-rotation assembly, in the driving assembly and the pressing and anti-rotation assembly, one of them is connected to the measuring instrument, and the other is used to be connected to the cylinder head, so that the cylinder head and the measuring instrument can rotate relative to each other; A controller, the sensor and the controller are communicatively connected; the controller is used to receive the detection parameters of the sensor and obtain the inner diameter, cylindricity, perpendicularity, roundness and roundness error value of the cylinder head according to the detection parameters.

2. The cylinder head inner hole parameter detection device according to claim 1, characterized in that, The measuring instrument includes a base and a column connected to each other. The base is provided with a bearing surface for placing the cylinder head, and the inner hole of the cylinder head is sleeved on the column; The column is provided with a first air blowing channel and a second air blowing channel; The first air blowing channel includes two first air outlets at the same height, the second air blowing channel includes two second air outlets at the same height, the first air outlets and the second air outlets are located on the same vertical line and are spaced apart; the first air outlets and the second air outlets are both located in the inner hole of the cylinder head; The first sensor includes two inner diameter detectors, one of the inner diameter detectors is arranged on the first air blowing channel, and the other inner diameter detector is arranged on the second air blowing channel.

3. The cylinder head inner hole parameter detection device according to claim 2, characterized in that The column is provided with a third air blowing channel and a fourth air blowing channel; The third air blowing channel includes two third air outlets at different heights, the fourth air blowing channel includes two fourth air outlets at different heights, and the third air outlets and the fourth air outlets are both located in the inner hole of the cylinder head; The second sensor includes two perpendicularity detectors, one of the perpendicularity detectors is arranged on the third air blowing channel, and the other perpendicularity detector is arranged on the fourth air blowing channel.

4. The cylinder head inner hole parameter detection device according to claim 2, characterized in that, The sensor further includes an airtight detector. The measuring instrument is provided with a fifth air blowing channel, and the fifth air outlet of the fifth air blowing channel is arranged on the bearing surface; the airtight detector is arranged on the fifth air blowing channel.

5. The cylinder head inner hole parameter detection device according to claim 4, characterized in that, The surface of the base is provided with a protrusion, and the surface of the protrusion serves as the bearing surface; the opening end surface of the fifth air outlet is flush with the surface of the protrusion.

6. The cylinder head inner hole parameter detection device according to claim 2, characterized in that, It further includes a workpiece carrier table, the workpiece carrier table includes a first placement table and a second placement table that can move relative to each other. The first placement table and the second placement table are relatively close to each other to a closed state to carry the cylinder head; there is a through hole for the column to pass through between the first placement table and the second placement table; The measuring instrument can move up and down relative to the workpiece carrier table so that the column passes through the through hole, and the bearing surface supports the cylinder head and separates the cylinder head from the workpiece carrier table.

7. The cylinder head inner hole parameter detection device according to claim 6, characterized in that A relief groove for avoiding the workpiece carrier table is provided on the base of the measuring instrument.

8. The cylinder head inner hole parameter detection device according to claim 6, characterized in that, It further includes an inductor for detecting whether the cylinder head is placed on the workpiece carrier table.

9. The cylinder head inner hole parameter detection device according to claim 1, wherein It further includes a cleaning component, which is used to purge the measuring instrument.

10. The cylinder head inner hole parameter detection device according to any one of claims 1 to 9, characterized in that, The pressing and anti-rotation component includes a pressing block, and a limiting column is provided on the pressing block; And / or, a plurality of support columns are arranged on the pressing block along the circumferential direction, and a buffer spring is provided on the support column.

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