CN108917517B - An automobile cylinder head measuring and testing tool - Google Patents

Abstract

The invention discloses a measuring and checking tool for an automobile cylinder head, which belongs to the field of mechanical manufacturing. The automobile cylinder head measuring and checking tool of the present invention: includes a frame plate, an upper lifting mechanism, a lower lifting mechanism, a measuring assembly, and a feeding assembly; the measuring assembly includes an upper measuring assembly, a lower measuring assembly, a front measuring assembly, and a rear measuring assembly. components. The inspection tool of the present invention can detect the position of the holes on the upper, lower, front and rear end faces of the cylinder head of the automobile to be inspected at the same time through the setting of the upper, lower, front and rear four groups of detection components, including the detection of blind holes and through holes. Compared with the traditional single-sided detection, the detection efficiency is improved, the detection range of the hole is expanded, and the scope of application of the inspection tool is mentioned.

Description

An automobile cylinder head measuring and testing tool

technical field

The invention relates to a measuring and checking tool for an automobile cylinder head, which belongs to the field of mechanical manufacturing.

Background technique

With the increase of car ownership, the requirements for car power and fuel economy have increased. The cylinder head is the main key part of the engine. The manufacturing and processing accuracy has a great influence on the quality of the engine. The relative position of the key holes and the processing accuracy of the key dimensions directly affect the performance of the engine. Therefore, the machining process of each hole must be strictly controlled, and the position accuracy of the holes processed in batches must be strictly tested one by one.

The part of the hole to be measured on the cylinder head is a deep hole or a hole with a special shape. When measuring a deep hole, the existing manual measuring rod cannot guarantee the verticality of the deep hole when it is placed into the deep hole. If it is too long or too short, it will affect the measurement accuracy. Ordinary measuring tools cannot measure the value to be measured once or even accurately when measuring special-shaped holes (such as the semi-circular hole on the cylinder head), causing repeated measurements to affect the measurement accuracy. In the existing technology, manual micrometers, hole plug gauges, and three-coordinate measuring machines are mainly used for detection. Although the measurement of the holes on the cylinder head can be completed, the measurement efficiency is relatively limited, and it will also affect the accuracy of detection. Now The cylinder head of some automobiles is mostly irregular, and there are many inclined surfaces and special holes. It is difficult for ordinary measuring tools to obtain the size of the hole to be measured accurately and efficiently. The applicability and practicability are limited. Higher, so there are many inspection tools required for one inspection, and the problem of long measurement time is that it is difficult to meet the needs of the market.

Ordinary inspection tools use manual loading and unloading during testing, which will increase the labor burden and slow down work efficiency. There may be situations where the workpiece falls and hurts people. Some will use robotic arms for loading and unloading, but Often the grabbing rate cannot be guaranteed, and the strength of the gripper is not easy to control, which will cause damage to the surface of the workpiece. In the process of feeding and returning materials, the workpiece is often skewed, which is not conducive to the entry and exit of the workpiece and the next positioning detection, and affects the detection accuracy.

Contents of the invention

The present invention improves the above-mentioned shortcomings in the prior art, and provides an automobile cylinder head measuring and checking tool, which can simultaneously detect various holes on multiple surfaces (especially slopes) of the automobile cylinder head, with reliable data and high degree of automation ,efficient.

The automobile cylinder head measuring and checking tool of the present invention: includes a frame plate, an upper lifting mechanism, a lower lifting mechanism, a measuring assembly, and a feeding assembly; the measuring assembly includes an upper measuring assembly, a lower measuring assembly, a front measuring assembly, and a rear measuring assembly. components;

The upper lifting mechanism includes a first lifting cylinder, a first fixed connecting plate, a first moving connecting plate, and a first moving guide post; there are four first moving guide posts, which are respectively fixed on the upper side of the frame plate by bolts, The first fixed connecting plate is installed on the top of the four first moving guide columns through bolts, the first lifting cylinder is installed and fixed on the upper side of the first fixed connecting plate, the first moving connecting plate is located on the lower side of the first fixed connecting plate, the first The mobile connecting plate has a through hole passing through the four moving guide columns, and is fixed on the cylinder rod of the first lifting cylinder;

The lower lifting mechanism includes a second lifting cylinder, a second fixed connecting plate, a second moving connecting plate, a second moving guide post, and a connecting track for feeding rails; there are four second moving guide posts, which are fixed with the machine by bolts. On the lower side of the frame plate, the second fixed connecting plate is fixed on the lower ends of the four second moving guide columns through bolts, and the second lifting cylinder is fixed on the lower side of the second fixed connecting plate through bolts, and the second moving connecting plate has Four through holes pass through the second moving guide post, and the second moving connecting plate is fixed on the cylinder rod of the second lifting cylinder;

The measurement assembly includes an upper measurement assembly, a lower measurement assembly, a front measurement assembly, and a rear measurement assembly. The upper measurement assembly, the front measurement assembly, and the rear measurement assembly are all fixed on the lower side of the first mobile connecting plate; The interval space surrounded by the measurement component, the rear measurement component and the frame plate is used to accommodate and position the cylinder head of the vehicle to be inspected;

further,

The upper measurement assembly includes a connecting column, a first measuring rod, a second measuring rod, and a sensor. The connecting column is vertically installed on the lower side of the first mobile connecting plate, and the first measuring rod and the second measuring rod are vertically installed on the lower side of the connecting column. On the side, the first measuring rod and the second measuring rod move up and down under the drive of the first lifting cylinder of the upper lifting mechanism, and the sensor obtains the measurement data after the first measuring rod and the second measuring rod extend into the hole to be measured. Among them, the first measuring rod is used to measure the deep hole on the upper part of the cylinder head to be tested, and the measuring contact of the first measuring rod can go deep into the hole for measurement, and four elastic contacts on the measuring contact touch the four holes on the inner wall of the hollow. points, the actual inner diameter of the hole to be measured is obtained by calculation. Since the first measuring rod is lifted and lowered by the cylinder, the vertical lifting can be guaranteed to avoid the skew of the first measuring rod, so that the measurement accuracy is improved. The hole measured by the second measuring rod is the upper through hole of the cylinder head to be tested. The second measuring rod includes a spring base, a measuring contact, and a proximity switch. The spring base is vertically installed on the first mobile connecting plate, and the measuring contact is installed on the spring base. In the through hole, the measuring contact faces the cylinder head to be tested and can move up and down. The upper end of the measuring contact is equipped with a proximity switch. When the measuring contact fails to extend into the hole to be tested, the proximity switch is triggered and the hole is unqualified.

The lower measuring assembly includes a connecting column, a third measuring rod, a fourth measuring rod, and a sensor. The third measuring rod and the fourth measuring rod are all installed on the second moving connecting plate, and the measuring contacts are facing the cylinder head to be measured.

The third measuring rod is used to measure the deep hole at the bottom of the cylinder head to be measured, and the measuring contact of the third measuring rod can go deep into the hole for measurement, and four elastic contacts on the measuring contact contact the four holes on the inner wall of the hollow. points, the actual inner diameter of the hole to be measured is obtained by calculation. Since the third measuring rod is lifted and lowered by the air cylinder, the vertical lifting can be guaranteed to avoid the skew of the third measuring rod, so that the measurement accuracy is improved. The hole measured by the fourth measuring rod is the upper through hole of the cylinder head to be tested. The fourth measuring rod includes a spring base, a measuring contact, and a proximity switch. The spring base is vertically installed on the first mobile connecting plate, and the measuring contact is installed on the spring base. In the through hole, the measuring contact faces the cylinder head to be tested and can move up and down. The upper end of the measuring contact is equipped with a proximity switch. When the measuring contact fails to extend into the hole to be tested, the proximity switch is triggered and the hole is unqualified.

The front measuring assembly includes the first mounting base, the first cylinder, the first linear guide rail, the connecting plate of the first measuring rod, the fifth measuring rod, the sixth measuring rod, and the first positioning pin. Due to the shape of the cylinder head to be measured It is an oblique triangular prism, and the angle between the surface to be measured measured by the front measuring component and the horizontal plane is 70°, so the upper surface of the first installation base is fixed on the lower side of the first mobile connecting plate of the upper lifting mechanism. The angle between the lower surface and the upper surface is 20°, the first linear guide rail and the first cylinder are installed on the lower surface of the first installation base, and the first measuring rod connecting plate is a vertical welded body of two plates, installed on the first On the slider of the linear guide rail, the installation surface of the measuring rod of the first measuring connecting plate is parallel to the surface to be measured of the cylinder head to be tested, and is driven by the first cylinder to slide up and down along the first linear guide rail, so that the cylinder head can be accurately aligned. The hole to be measured on the cover is measured.

The fifth measuring rod of the front measuring assembly is used to measure the semicircular hole, and is installed vertically on the connecting plate of the first measuring rod, and the end of the fifth measuring rod and the two sides along the diameter of the measuring rod respectively have an elastic measuring contact , when the fifth measuring rod extends into the semicircular hole, the end contact contacts the bottom of the semicircular hole, and the contacts on both sides contact the surface of the semicircular hole, and the size data of the hole to be measured is obtained through calculation.

The structure of the sixth measuring rod of the front measuring assembly corresponds to the structure of the first measuring rod.

The rear measurement assembly includes a second mounting base, a second cylinder, a second linear guide rail, a second measuring rod connecting plate, a seventh measuring rod, an eighth measuring rod, and a second positioning pin. Since the shape of the cylinder head to be measured is Oblique triangular prism, the angle between the surface to be measured and the horizontal plane measured by the rear measurement component is 60°, so the angle between the upper surface and the lower surface of the second installation base is 30°, and the upper surface of the second installation base is installed on the upper lifting mechanism The lower side of the first moving connecting plate, the second linear guide rail and the second cylinder are installed on the lower surface of the second installation base, the second measuring rod connecting plate is a vertical welded body of two plates, and is installed on the second linear guide rail On the slider, the lever end of the second cylinder is installed on both sides of the connecting plate of the second measuring rod. At this time, the mounting surface of the measuring rod of the second measuring connecting plate is parallel to the surface to be measured of the cylinder head to be measured, driven by the second cylinder Sliding up and down along the second guide rail can accurately measure the hole to be measured on the cylinder head.

The feeding assembly includes a mounting frame, a rodless cylinder, a connecting rod, a gripper, and a feeding track. The mounting frame is an aluminum alloy profile fixed on the upper side of the first fixed connecting plate, and one end of the rodless cylinder is fixed on the first fixed The lower side of the connecting plate, the other end is fixed on the mounting frame, the connecting rod is an aluminum alloy profile installed on the slider of the rodless cylinder, the gripper is installed on the lower end of the connecting rod, and the feeding track is installed on the upper side of the frame plate . The gripper is composed of a pusher rod and a ejector rod. A mounting plate is installed at the lower end of the connecting rod. The ejector rod is installed on the upper side of the installation plate. The material rod is in the state of opening to both sides, and the cylinder controlling the push rod is stretched out to feed the material. When the material is returned, the cylinder of the push rod is retracted and the return rod merges to the middle and hooks the casting rib on the cylinder head to be tested. The cylinder cover is pulled out of the detection area.

The feeding track includes bottom measuring roller strips and two side limit roller strips, the bottom measuring roller strips are symmetrically arranged; the two side limit roller strips are arranged oppositely. It can effectively limit the skew of the workpiece during the feeding and returning process, and lay a good foundation for improving the positioning accuracy and detection accuracy.

The connecting track of the feeding track of the lower lifting mechanism includes a jacking cylinder, a guide rail connecting rod, and a guide rail. The elongated hole on the frame plate protrudes, and the guide rail is installed on the end of the guide rail connecting rod and is parallel to the feeding guide rail. During the process of feeding and unloading, the jacking cylinder raises the connecting track to be in the same plane as the feeding track, so that the workpiece enters and exits the detection area smoothly; when detecting the cylinder head hole, the jacking cylinder descends to make the workpiece fall into the frame plate The positioning pin on the upper is convenient for fixing the workpiece, which improves the detection accuracy.

Technical effect of the present invention:

1. Through the setting of the upper, lower, front and rear four sets of detection components, the position of the holes on the upper, lower, front and rear end faces of the cylinder head of the car to be inspected can be detected at the same time, including the detection of blind holes and through holes. Compared with traditional The single-sided detection improves the detection efficiency, expands the detection range of the hole, and mentions the scope of application of the inspection tool.

2. The four groups of detection components use the connection plate to drive the detection rod to rise and fall as a whole, and the spring resets, which not only saves the use of cylinders, but also improves the efficiency of detection and facilitates the installation of the entire detection component. Different holes use different types of proximity switches. to test.

3. By setting the support rails in the space between each testing component as a liftable structure, and equipped with a workpiece conveying structure, the automatic transportation of the cylinder head of the car to be inspected can be realized, and the automatic operation of the inspection tool is realized.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention, (A) the first viewing angle, (B) the second viewing angle.

FIG. 2 is a left side view of a partially enlarged view at point C of the feeding gripper 18 in FIG. 1 .

Figure 3 is a schematic diagram of the upper measurement assembly.

FIG. 4 is a partially enlarged view at D of a measuring rod 23 in FIG. 3 .

Figure 5 is a schematic diagram of the lower measurement assembly.

Figure 6 is a schematic diagram of the front measurement assembly.

FIG. 7 is a partial enlarged view of A in FIG. 6 .

Figure 8 is a schematic diagram of the post-measurement assembly.

Fig. 9 is a partially enlarged view of the feeding guide rail in Fig. 1E.

Fig. 10 is a schematic diagram of conveying the cylinder head to be tested to the feeding gripper.

Fig. 11 is a schematic diagram of the feeding gripper pushing the cylinder head to be tested to the detection position.

Fig. 12 is a schematic diagram of the measurement of the front measurement component.

Fig. 13 is a schematic diagram of the measurement of the rear measurement component.

Fig. 14 is a schematic diagram of the measurement of the upper measurement component.

Fig. 15 is a schematic diagram of the measurement of the lower measurement component.

In the figure, 1: the first fixed connection plate, 2: the first lifting cylinder, 3: the first moving guide column, 4: the rear measurement component, 5: the front measurement component, 6: the installation frame, 7: the frame plate, 8 : the first moving connecting plate, 9: the second moving guide column, 10: the second moving connecting plate, 11: the second fixed connecting plate, 12: the second lifting cylinder, 13: jacking cylinder, 14: guide rail connecting rod, 15: guide rail, 16: rodless cylinder, 17: connecting rod, 18: feeding gripper, 19: feeding guide rail, 20: pushing rod, 21: ejecting rod, 22: connecting plate, 23: first measuring rod, 24: Second measuring rod, 25: Elastic measuring contact, 26: Third measuring rod, 27: Fourth measuring rod, 28: First mount, 29: First cylinder, 30: First linear guide, 31 : Measuring rod connecting plate, 32: Fifth measuring rod, 33: Sixth measuring rod, 34: First sensor, 35: Measuring contact, 36: Second mount, 37: Second cylinder, 38: Second straight line Guide rail, 39: second measuring rod mounting plate, 40 second sensor, 41: seventh measuring rod, 42: eighth measuring rod, 43: feeding assembly line, 44: cylinder head to be tested.

Detailed ways

As shown in Figure 1, an automobile cylinder head measuring and checking tool is provided, including an upper lifting mechanism, a lower lifting mechanism, a measuring component, and a feeding component. In the upper lifting mechanism, the first moving guide column 3 is installed on the frame plate 7, the first moving connecting plate 8 passes through the first moving guiding column 3, and the first fixed connecting plate 1 is installed on the first moving guiding column 3 On the side, the first lifting cylinder 2 is installed on the first fixed connecting plate 1, and the cylinder rod of the first lifting cylinder 2 passes through the through hole on the first fixed connecting plate 1 and is installed on the first moving connecting plate 3. In the lower lifting mechanism, the second moving guide column 9 is installed on the underside of the frame plate 7, the second moving connecting plate 10 passes through the second moving guiding column 9, and the second fixed connecting plate 11 is installed on the second moving guiding column 9, the second lift cylinder 12 is installed on the lower side of the second fixed connection plate 11, and the cylinder rod of the second lift cylinder 12 passes through the through hole of the second fixed connection plate 11 and is installed on the bottom of the second mobile connection plate 10. On the side, the jacking cylinder 13 of the feeding track connecting the track is installed on the upper side of the second fixed connecting plate 11, and the guide rail connecting rod 14 is installed on the cylinder rod end of the jacking cylinder 13 and passes through the long through hole of the frame plate 7, and the guide rail 15 is installed on the upper end of guide rail connecting rod 14. In the feeding assembly, the mounting frame 6 is installed on the upper side of the first fixed connecting plate 1, the mounting frame 6 is spliced by aluminum alloy profiles through bolts, and is used for mounting the rodless cylinder 16, and one end of the rodless cylinder 16 is mounted on the first fixed connection plate. One end of the lower side of the connecting plate 1 is installed on the lower side of the mounting frame 6, the connecting rod 17 is installed on the slider of the rodless cylinder 16, the feeding guide rail 19 is installed on the frame plate 7, and the feeding gripper 18 is installed on the connecting rod 17 the end.

As shown in FIG. 2 , it is a partially enlarged view of the feeding handle 18 , and the pushing rod 20 and the ejecting rod 21 are respectively installed on the upper and lower sides of the connecting plate 22 .

As shown in Figure 3, it is a schematic diagram of the upper measurement assembly. The first measuring rod 23 and the second measuring rod 24 are all installed on the lower side of the first mobile connecting plate 8, as shown in Figure 4, it is a partial enlarged view of the first measuring rod 23 , The elastic measuring contact 25 is installed on the first measuring rod 23 . The first moving connecting plate 8 moves up and down under the drive of the first lifting cylinder 2. When the measuring rod enters the hole to be measured, the measuring contact touches the inner surface of the hole. The second measuring rod 24 is a measuring rod with a spring base. When the measuring rod fails to stretch into the measuring hole, the proximity switch at the upper end detects a signal, and the measured hole of the measuring rod is unqualified.

As shown in Figure 5, it is a schematic diagram of the lower measuring assembly. The third measuring rod 26 and the fourth measuring rod 27 are all installed on the second moving connecting plate 10 of the lower lifting mechanism. Similar to the elastic measuring contact, when the lower lifting mechanism cylinder 12 raises the second moving connecting plate 10, the third measuring rod 26 enters the hole to be measured, and the elastic measuring contact contacts the inner wall of the hole to be measured, and the sensors at four points get four The signal of the elastic contact at 1 point is calculated to obtain the data of the hole to be measured.

As shown in Figure 6, it is the front measurement assembly, the upper and lower surfaces of the mounting seat 28 have an angle of 20°, and the upper surface is installed on the lower side of the first mobile connecting plate 8 of the upper lifting mechanism, the first cylinder 29, the first linear guide rail 30 Installed on the lower surface of the mounting base 28, one side of the measuring rod connecting plate 31 is installed parallel to the lower surface of the mounting base 28, fixed on the slider of the first linear guide rail 30, and the cylinder rod of the first cylinder 29 is installed on the connecting rod of the measuring rod. both sides of the board. Since the cylinder head to be measured is an oblique triangular prism, the included angle of the mounting seat 28 can make the mounting surface of the measuring rod of the measuring rod connecting plate 31 parallel to the surface to be measured of the workpiece, which can accurately and efficiently measure the hole to be measured. The fifth measuring rod 32. The sixth measuring rod 33 is installed on the connecting plate of the measuring rod, and the measuring contact faces the workpiece to be measured. When the first cylinder 29 moves, the connecting plate 31 of the measuring rod moves downward along the first linear guide rail 30, and the measuring rod Enter the hole to be measured for measurement.

As shown in Figure 7, it is a partial enlarged view of A place in Figure 6. This is the measuring contact of the fifth measuring rod 32. Since the hole to be measured is a semicircular hole, the fifth measuring rod 32 will move the elastic measuring contact along the hole to be measured. The diameter direction is symmetrically arranged, and the measuring contact at the end is used for measurement. After the upper sensor receives the signal of the measuring contact, the data of the hole to be measured is obtained through calculation.

As shown in Figure 8, it is the rear measurement assembly, the angle between the upper and lower surfaces of the mounting seat 36 is 30°, the upper surface is installed on the lower side of the first mobile connecting plate 8 of the upper lifting mechanism, and the second cylinder 37 and the second linear guide rail 38 are installed. On the lower surface of the mounting seat, the mounting surface of the second measuring rod connecting plate 39 is installed parallel to the lower surface of the mounting seat 36, and is fixed on the moving slide block of the second linear guide rail 38, and the cylinder rod end of the second cylinder 37 is fixed on the bottom surface of the mounting seat 36. Both sides of the connecting plate of the measuring rod, because the cylinder head to be measured is an oblique triangular prism, the angle between the surface to be measured and the horizontal plane of the rear measuring assembly is 60°, and the angle of the mounting seat 36 can make the mounting surface of the measuring rod on the connecting plate and the horizontal plane The planes to be measured are parallel, so that the holes to be measured can be measured accurately and efficiently. The seventh measuring rod 41 and the eighth measuring rod 42 are all installed on the second measuring rod connecting plate 39, and the measuring contacts face the workpiece to be measured. When the second During cylinder 37 actions. The seventh measuring rod connecting plate 39 moves downward along the linear guide rail 38, and the measuring rod enters the hole to be measured for measurement.

The space between the feeding gripper 18 and the frame plate 7 is the feeding assembly line. When the workpiece to be measured is transported to the feeding gripper 18 through the assembly line, the pusher rod 20 is stretched out to send the workpiece to be measured into the measurement area, and the fixture is fixed After completion, the upper, lower, front and rear measuring components are respectively driven by the cylinder to measure, reset after the measurement is completed, and the ejector rod 21 is driven by the rodless cylinder 16 to pull out the workpiece to be measured to the feeding assembly line.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the claims.

Claims (5)

1. An automobile cylinder head measuring and checking tool is characterized in that it includes a frame plate, an upper elevating mechanism, a lower elevating mechanism, a measuring assembly, and a feeding assembly; the measuring assembly includes an upper measuring assembly, a lower measuring assembly, and a front measuring assembly. components, post-measurement components; The upper lifting mechanism includes a first lifting cylinder, a first fixed connecting plate, a first moving connecting plate, and a first moving guide post; there are four first moving guide posts, which are respectively fixed on the upper side of the frame plate by bolts, The first fixed connecting plate is installed on the top of the four first moving guide columns through bolts, the first lifting cylinder is installed and fixed on the upper side of the first fixed connecting plate, the first moving connecting plate is located on the lower side of the first fixed connecting plate, the first The mobile connecting plate has a through hole passing through the four moving guide columns, and is fixed on the cylinder rod of the first lifting cylinder; The lower lifting mechanism includes a second lifting cylinder, a second fixed connecting plate, a second moving connecting plate, a second moving guide post, and a connecting track for feeding rails; there are four second moving guide posts, which are fixed with the machine by bolts. On the lower side of the frame plate, the second fixed connecting plate is fixed on the lower ends of the four second moving guide columns through bolts, and the second lifting cylinder is fixed on the lower side of the second fixed connecting plate through bolts, and the second moving connecting plate has Four through holes pass through the second moving guide column, and the second moving connecting plate is fixed on the cylinder rod of the second lifting cylinder; the connecting track of the feeding track includes a jacking cylinder, a guide rail connecting rod, and a guide rail, and the jacking cylinder is installed at the bottom The upper side of the second fixed connecting plate of the lifting mechanism, the guide rail connecting plate is installed at the end of the cylinder rod, protruding through the long hole on the frame plate, and the guide rail is installed at the end of the guide rail connecting rod parallel to the feeding guide rail; the feeding and returning process In the process, the jacking cylinder raises the connecting track and the feeding track is in the same plane, so that the workpiece enters and exits the detection area smoothly; when the cylinder head hole is detected, the jacking cylinder descends to make the workpiece fall onto the positioning pin on the frame plate It is convenient to fix the workpiece and improve the detection accuracy; The measurement assembly includes an upper measurement assembly, a lower measurement assembly, a front measurement assembly, and a rear measurement assembly. The upper measurement assembly, the front measurement assembly, and the rear measurement assembly are all fixed on the lower side of the first mobile connecting plate; The interval space surrounded by the measurement component, the rear measurement component and the frame plate is used to accommodate and position the cylinder head of the vehicle to be inspected; The front measuring assembly includes a first mounting base, a first air cylinder, a first linear guide rail, a first measuring rod connecting plate, a fifth measuring rod, a sixth measuring rod, and a first positioning pin. The angle between the measuring surface and the horizontal plane is 70°, the upper surface of the first installation base is fixed on the lower side of the first moving connecting plate of the upper lifting mechanism, the angle between the lower surface and the upper surface is 20°, the first linear guide rail And the first cylinder is installed on the lower surface of the first installation base, the first measuring rod connecting plate is a vertical welded body of two plates, installed on the slider of the first linear guide rail, and the measuring rod of the first measuring connecting plate is installed The surface is parallel to the surface to be measured of the cylinder head to be measured, and is driven by the first cylinder to slide up and down along the first linear guide rail; the fifth measuring rod of the front measuring assembly is used to measure the semicircular hole, and is installed vertically on the first On the connecting plate of a measuring rod, there is an elastic measuring contact at the end of the fifth measuring rod and on both sides along the diameter of the measuring rod. When the fifth measuring rod is inserted into the semicircular hole, the end contact touches the bottom of the semicircular hole , the contacts on both sides touch the surface of the semicircular hole, and the size data of the hole to be measured is obtained through calculation; The rear measurement assembly includes a second mounting base, a second cylinder, a second linear guide rail, a second measuring rod connecting plate, a seventh measuring rod, an eighth measuring rod, and a second positioning pin. The angle between the surface and the horizontal plane is 60°, the angle between the upper surface and the lower surface of the second installation base is 30°, the upper surface of the second installation base is installed on the lower side of the first mobile connecting plate of the upper lifting mechanism, and the second straight line The guide rail and the second cylinder are installed on the lower surface of the second installation base. The second measuring rod connecting plate is a vertical welded body of two plates, which is installed on the slider of the second linear guide rail. The lever end of the second cylinder is installed on the second The two sides of the connecting plate of the measuring rod. At this time, the mounting surface of the measuring rod of the second measuring connecting plate is parallel to the surface to be measured of the cylinder head to be tested. Driven by the second cylinder, it slides up and down along the second guide rail, so that the cylinder head can be accurately aligned. The hole to be measured on the cover is used for measurement; The feeding assembly includes a mounting frame, a rodless cylinder, a connecting rod, a gripper, and a feeding track. The mounting frame is an aluminum alloy profile fixed on the upper side of the first fixed connecting plate, and one end of the rodless cylinder is fixed on the first fixed The lower side of the connecting plate, the other end is fixed on the mounting frame, the connecting rod is an aluminum alloy profile installed on the slider of the rodless cylinder, the gripper is installed on the lower end of the connecting rod, and the feeding track is installed on the upper side of the frame plate ; The gripper is composed of a pusher rod and a return rod, the lower end of the connecting rod is equipped with a mounting plate, the return rod is installed on the upper side of the installation plate, and the pusher rod is installed on the lower side of the installation plate, when the gripper is feeding The ejector rod is in the state of opening to both sides, and the cylinder that controls the ejector rod extends to feed the material. When ejecting the material, the ejector rod cylinder retracts and the ejector rod merges to the middle and hooks the casting rib on the cylinder head to be tested. The cylinder head to be tested is pulled out of the detection area. 2. A kind of automobile cylinder head measurement inspection tool according to claim 1, characterized in that, the upper measurement assembly includes a connecting column, a first measuring rod, a second measuring rod, and a sensor, and the connecting column is vertically installed on the first Move the lower side of the connecting plate, the first measuring rod and the second measuring rod are vertically installed on the lower side of the connecting column, the first measuring rod and the second measuring rod move up and down driven by the first lifting cylinder of the upper lifting mechanism, the second After the first measuring rod and the second measuring rod extend into the hole to be measured, the sensor obtains measurement data. 3. A kind of automobile cylinder head measuring and checking tool according to claim 2, characterized in that, the first measuring rod is used to measure the deep hole on the upper part of the cylinder head to be measured, and the measuring contact of the first measuring rod can go deep into the hole For measurement, there are four elastic contacts on the measuring contact that touch four points on the inner wall of the hollow, and the actual inner diameter of the hole to be measured is obtained through sensor detection and calculation; the hole measured by the second measuring rod is the upper hole of the cylinder head to be tested. hole, the second measuring rod includes a spring base, a measuring contact, and a proximity switch, the spring base is vertically installed on the first mobile connecting plate, the measuring contact is installed in the through hole of the spring base, and the measuring contact faces the cylinder head to be measured, It can move up and down. The upper end of the measuring contact is equipped with a proximity switch. When the measuring contact fails to extend into the hole to be tested, the proximity switch is triggered and the hole is unqualified. 4. A kind of automobile cylinder head measuring and checking tool according to claim 1, characterized in that, the lower measuring assembly includes a connecting column, a third measuring rod, a fourth measuring rod, a sensor, a third measuring rod, a fourth measuring rod The measuring rods are all installed on the second movable connecting plate, and the measuring contacts face the cylinder head to be tested. 5. A kind of automobile cylinder head measurement inspection tool according to claim 4, characterized in that, the third measuring rod is used to measure the deep hole at the bottom of the cylinder head to be measured, and the measuring contact of the third measuring rod can go deep The measurement is carried out in the hole, and the four elastic contacts on the measuring contact touch the four points on the inner wall of the hollow, and the actual inner diameter of the hole to be measured is obtained through calculation; the hole measured by the fourth measuring rod is the upper through hole of the cylinder head to be measured , the fourth measuring rod includes a spring base, a measuring contact, and a proximity switch, the spring base is vertically installed on the first mobile connecting plate, the measuring contact is installed in the through hole of the spring base, and the measuring contact faces the cylinder head to be measured, which can be Moving up and down, the upper end of the measuring contact is equipped with a proximity switch. When the measuring contact fails to extend into the hole to be measured, the proximity switch is triggered and the hole is unqualified.