CN103123249A - Detection tool and detection method for position of cylinder head process hole - Google Patents

Abstract

The invention discloses a tool for detecting the position degree of a process hole of a cylinder head and a detecting method. The cylinder head process hole position inspection tool includes: a measuring plate, a tubular positioning measuring sleeve, a positioning block, a circular positioning rod for a process hole, a diamond-shaped positioning rod for a process hole, and three or more diamond-shaped pins for the blank hole of the intake valve seat. And the scanning gauge, the test plate is provided with test through holes corresponding to the process hole on the cylinder head to be tested and the blank hole of the intake valve seat; the positioning block is fixed on the lower surface of the test plate; the positioning test sleeve is installed coaxially with the test through hole On the upper surface of the test plate, and the diameter of the inner hole is larger than the diameter of the corresponding blank hole of the intake valve seat. Visually observe whether the ring in the positioning measuring sleeve corresponding to the blank hole of the intake valve seat is large on one side and small on the other. You can also use a scanning gauge to detect the specific deviation value. It can be selected according to different needs in production, which is convenient and convenient. Fast, high measurement accuracy, high detection efficiency.

Description

Cylinder head technology hole position inspection tool and inspection method

technical field

The invention relates to the field of engines, in particular to a measuring tool for the position degree of a process hole of a cylinder head and a detecting method.

Background technique

At present, the engine cylinder head is a very important part among the many parts of the engine. In the processing process of the cylinder head, generally after the face milling, it is necessary to process the process hole first, and use it for the pin positioning in the subsequent process. When processing the process hole, the blank hole of the intake valve seat is generally used for positioning. When the valve seat hole is processed in the subsequent process, the process hole is used for positioning in reverse, so that the mutual position can be well guaranteed, thereby ensuring the airway performance of the cylinder head. If the position deviation of the process hole is large, it will not only affect the performance of the engine, but also cause scrapping if it is serious. Therefore, the machining accuracy of the process hole position of the cylinder head is very important, and it is necessary to equip with corresponding and applicable process detection means.

When detecting the position of the cylinder head process hole relative to the intake valve seat blank hole used for positioning, the traditional method is to use a three-coordinate machine to detect or use a height vernier caliper and a lever dial indicator on the upper platform to detect. The above two types of detection The disadvantage of this method is that it is inconvenient to detect, it takes a long time, and the detection efficiency is low, which affects the normal operation of the production line. It is not suitable for use as a routine detection method for process control when the production cycle is fast.

Contents of the invention

The technical problem to be solved by the invention is to provide a cylinder head process hole position inspection tool and a detection method with high measurement accuracy and high detection efficiency.

In order to achieve the above object, according to one aspect of the present invention, a cylinder head process hole position inspection tool is provided, including: a measuring plate, a tubular positioning measuring sleeve, a positioning block, a circular positioning rod for a process hole, and a diamond-shaped positioning rod for a process hole , Three or more intake valve seat blank hole diamond-shaped pins and scanning gauges, the test plate is provided with test through holes corresponding to the process hole on the cylinder head to be tested and the intake valve seat blank hole; the positioning block is fixed on The lower surface of the test plate; the positioning measuring sleeve and the test through hole are coaxially installed on the upper surface of the test plate, and the diameter of the inner hole is larger than the diameter of the corresponding intake valve seat blank hole.

Further, the circular positioning rod of the process hole, the diamond-shaped positioning rod of the process hole and the diamond-shaped pin of the blank hole of the intake valve seat are all columnar, the upper part is a handle, the diameter of the middle part is inserted in cooperation with the diameter of the inner hole of the positioning measuring sleeve, and the process hole is circular The lower end of the positioning rod has a circular positioning head for a process hole with a circular cross section that is matched with the corresponding process hole; The diamond-shaped positioning head of the hole; the lower end of the diamond-shaped pin of the blank hole of the intake valve seat has a diamond-shaped positioning head of the blank hole of the intake valve seat with a diamond-shaped cross-section that is matched with the corresponding blank hole of the intake valve seat.

Further, the scanning gauge includes: a measuring head, a measuring rod, a pin, a measuring rod cover, a handle and a dial indicator. Wherein, the outer cover of the measuring rod is tubular, and the handle is fixed on the top of the outer cover of the measuring rod; On the lumen wall of the outer casing of the rod; the measuring head can be stretched radially and laterally through the lower end of the measuring rod.

Further, bridge-shaped handles are installed on both sides of the test board.

According to another aspect of the present invention, a method for detecting the position degree of a cylinder head process hole is provided, and the specific detection process includes:

Step A: First place the test board on the cylinder head to be tested; then insert the circular positioning rod of the process hole and the diamond-shaped positioning rod of the process hole through the positioning sleeve into the process hole on the cylinder head to be tested for positioning, or place three Or more than three diamond-shaped pins in the blank hole of the intake valve seat pass through the positioning measuring sleeve into the blank hole of the intake valve seat on the cylinder head to be tested for positioning;

Step B: When positioning through the circular positioning rod of the process hole and the diamond-shaped positioning rod of the process hole, whether there is a large deviation between the center of the inner hole of the visual positioning measuring sleeve and the center of the blank hole of the intake valve seat on the cylinder head to be tested, or Whether there is a large deviation between the center of the inner hole of the positioning measuring sleeve and the center of the intake valve seat blank hole on the cylinder head to be tested through the scanning gauge arranged in the blank hole of the intake valve seat on the cylinder head to be tested; When the valve seat blank hole rhombic pin is positioned, the scanning gauge set in the process hole on the cylinder head to be tested is used to detect whether there is a large deviation between the center of the inner hole of the positioning sleeve and the center of the process hole on the cylinder head to be tested.

According to the technical scheme of the present invention, by opening a test through hole on the test plate corresponding to the position of the cylinder head process hole and the blank hole of the intake valve seat, and assembling a positioning measuring sleeve in the test through hole, when detecting the position degree of the cylinder head process hole , you can use the process hole to locate, and visually observe whether the ring in the positioning measuring sleeve corresponding to the blank hole of the intake valve seat has a phenomenon that one side is large and the other is small, or you can use a scanning gauge to detect the specific deviation value. Different needs to choose, convenient and fast, high measurement accuracy, high detection efficiency.

Description of drawings

Fig. 1 is a schematic structural view of a cylinder head process hole position gauge according to the present invention;

Fig. 2 is the top view structure schematic diagram of the test plate of the cylinder head process hole position degree gauge according to the present invention;

Fig. 3 is a partial cross-sectional structural schematic diagram of a scanning gauge of a cylinder head process hole position gauge according to the present invention;

Fig. 4 is the structural representation of cylinder head to be tested;

Fig. 5 is a flow chart of a detection method using a cylinder head process hole position degree inspection tool according to the present invention.

Detailed ways

A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

Referring to Figure 1, the cylinder head process hole position inspection tool and detection method include: measuring plate 1, positioning measuring sleeve 2, positioning block 3, process hole circular positioning rod 4, process hole rhombic positioning rod 5, three air intake Door seat blank hole diamond pin 6 and scanning gauge 7.

Wherein, in conjunction with shown in Fig. 2 and Fig. 4, test plate 1 is provided with two process holes 81 and six intake valve seat blank holes 82 corresponding eight test through holes 11 on the cylinder head 8 to be tested, for convenience For the movement of the test board 1 during the detection process, bridge-shaped handles 12 are installed on the left and right sides of the test board 1 . There are a plurality of positioning blocks 3, which are fixed on the lower surface of the test board 1. During testing, the test board 1 is supported on the cylinder head 8 to be tested by a plurality of positioning blocks 3 for positioning.

The positioning measuring sleeve 2 is tubular, with a mounting flange at the bottom, through which the mounting flange and eight test through holes 11 coaxial bolts are installed on the upper surface of the measuring plate 1, and the diameter ratio of the inner hole of the positioning measuring sleeve 2 corresponds to the air intake The diameter of the door seat blank hole 82 is slightly larger.

The circular positioning rod 4 of the process hole, the diamond-shaped positioning rod 5 of the process hole and the diamond-shaped pin 6 of the blank hole of the intake valve seat are all columnar. The lower end of the process hole circular positioning rod 4 has a circular positioning head 41 with a cross section matched with the corresponding process hole 81; A positioning head 51 with a rhombic cross-section; a diamond-shaped positioning head 61 with a rhombic cross-section positioned at the lower end of the intake valve seat blank hole 82 in cooperation with the corresponding intake valve seat blank hole 82 .

As shown in FIG. 3 , the scanning gauge 7 includes: a measuring head 71 , a measuring rod 72 , a pin 73 , a measuring rod cover 74 , a handle 75 and a dial indicator 76 . Wherein, the measuring rod outer cover 74 is tubular, with a radial flange in the middle. During detection, the measuring rod outer cover 74 is inserted into the positioning measuring sleeve 2, and is stuck on the upper port through the radial flange; the handle 75 is fixed on the measuring rod outer cover. 74 top. The measuring rod 72 is installed in the lumen of the measuring rod overcoat 74 , the upper end is connected with the detection rod of the dial indicator 76 , and the middle part is fixed on the lumen wall of the measuring rod overcoat 74 through the pin 73 transversely. The measuring head 71 is arranged on the lower end of the measuring rod 72 in the radial direction, and can be stretched and adjusted laterally.

As shown in Figure 5, the specific process of applying the detection method of the cylinder head process hole position degree inspection tool includes:

Step A: Place the test board 1 on the cylinder head 8 to be tested by using the handle 12; insert the circular positioning rod 4 of the process hole and the rhombic positioning rod 5 of the process hole through the positioning sleeve 2 into the two holes on the cylinder head 8 to be tested. A process hole 81 is positioned, or three intake valve seat blank hole rhombic pins 6 are penetrated into three of six intake valve seat blank holes 82 on the cylinder head 8 to be tested by positioning measuring sleeve 2 and positioned;

Step B: When positioning through the circular positioning rod 4 of the process hole and the diamond-shaped positioning rod 5 of the process hole, visually determine whether the center of the inner hole of the positioning sleeve 2 and the center of the blank hole 82 of the intake valve seat on the cylinder head 8 to be tested exist Large deviation, or whether the center of the inner hole of the positioning measuring sleeve 2 is in line with the intake valve seat blank on the cylinder head 8 to be tested by the scanning gauge 7 arranged in the intake valve seat blank hole 82 on the cylinder head 8 to be tested There is a large deviation in the center of the hole 82; when the positioning is performed through the diamond-shaped pins 6 of the three intake valve seat blank holes, the inside of the positioning measuring sleeve 2 is detected by the scanning gauge 7 arranged in the process hole 81 on the cylinder head 8 to be tested. Whether there is a large deviation between the center of the hole and the center of the process hole 81 on the cylinder head 8 to be tested.

When using the visual detection method, since the diameter of the inner hole of the positioning measuring sleeve 2 is slightly larger than the diameter of the corresponding intake valve seat blank hole 82, a uniform circular ring can be observed when the deviation is small, and if the deviation is large, it can be It can be seen that one side of the ring is larger and the other is smaller. In general, the center of the cylinder head process hole is allowed to have a deviation of no more than 0.25-0.5mm relative to the center of the intake valve seat blank hole. If the deviation exceeds this range, it is enough to detect it by visual inspection.

When the scanning gauge is used for detection, the scanning gauge 7 performs circumferential and axial positioning through the measuring rod cover 74 and the positioning measuring sleeve 2, the measuring head 71 is in contact with the hole to be detected, and the scanning gauge 7 is rotated by the handle 75. When the measuring head 71 is stressed , its offset will be transmitted to the dial indicator 76 through the rotation of the measuring rod 72 around the pin 73. Since the pin 73 is arranged in the middle, the offset of the measuring head 71 is equal to the reading of the dial indicator 76. Thus, the position degree of the detected hole is obtained. Since the process hole is a processed hole, it is obviously more accurate to use a scanning gauge to detect. When the number of intake valve seat blank holes on the cylinder head is large, the casting deviation can also be detected by scanning gauges for the intake valve seat blank holes that are not used for positioning.

By opening the test through hole 11 on the test plate 1 corresponding to the position of the cylinder head process hole 81 and the blank hole 82 of the intake valve seat, the positioning measuring sleeve 2 is assembled in the testing through hole 11, and the inner hole diameter ratio of the positioning measuring sleeve 2 is The diameter of the corresponding intake valve seat blank hole 82 is slightly larger. When testing the position of the process hole of the cylinder head, you can use the process hole to locate, and visually observe whether the ring in the positioning measuring sleeve corresponding to the blank hole of the intake valve seat has a phenomenon that one side is large and the other is small, or you can use a scanning gauge to detect the specific The deviation value can be selected according to different needs in production, which is convenient and fast, with high measurement accuracy and high detection efficiency.

The above disclosure is only a specific embodiment of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (5)

1. cylinder head fabrication hole position detecting tool, it is characterized in that, comprise: cover, locating piece, the circular backstay of fabrication hole, fabrication hole rhombus backstay, suction valve cone blank hole rhombus pin and scanning rule more than three or three are surveyed in drafting board, tubulose location, described drafting board offer with cylinder head to be measured on fabrication hole and suction valve cone blank hole test accordingly through hole; Described locating piece is fixed on the lower surface of described drafting board; Cover and the coaxial upper surface that is arranged on described drafting board of described test through hole are surveyed in described location, and the diameter of endoporus is larger than the diameter of corresponding described suction valve cone blank hole.

2. cylinder head fabrication hole position detecting tool according to claim 1, it is characterized in that, the circular backstay of described fabrication hole, fabrication hole rhombus backstay and suction valve cone blank hole rhombus pin are column, top is handle, the diameter at middle part coordinates with the diameter of bore that cover is surveyed in described location insertions, and it is the fabrication hole circle positioning head of circle that the lower end of the circular backstay of described fabrication hole has with the match xsect of location of corresponding described fabrication hole; The lower end of described fabrication hole rhombus backstay have with corresponding described fabrication hole match the location xsect be the fabrication hole rhombus positioning head of rhombus; The lower end of described suction valve cone blank hole rhombus pin have with corresponding described suction valve cone blank hole match the location xsect be the suction valve cone blank hole rhombus positioning head of rhombus.

3. cylinder head fabrication hole position detecting tool according to claim 1 and 2, is characterized in that, described scanning rule comprises: gauge head, measuring staff, pin, measuring staff overcoat, handle and dial gauge.Wherein, described measuring staff overcoat is tubulose, and described handle is fixed on the top of described measuring staff overcoat; Described measuring staff is located in the tube chamber of described measuring staff overcoat, and the upper end is connected with the test rod of described dial gauge, and the middle part is horizontally through on the wall of the lumen that is fixed on described measuring staff overcoat by described pin; But described gauge head is the lower end that is located in described measuring staff of transversal stretching radially.

4. cylinder head fabrication hole position detecting tool according to claim 1, is characterized in that, the two sides of described drafting board also are equipped with the bridge type handgrip.

5. an application as the detection method of the described cylinder head fabrication hole of any one in claim 1 to 4 position detecting tool, is characterized in that, concrete testing process comprises:

Steps A: first drafting board is placed on cylinder head to be measured; Again the circular backstay of fabrication hole and fabrication hole rhombus backstay are surveyed by location and overlapped the fabrication hole that penetrates on cylinder head to be measured and position, perhaps the suction valve cone blank hole rhombus pin more than three or three is surveyed by the location and overlapped positioning in the suction valve cone blank hole that penetrates on cylinder head to be measured;

Step B: when positioning by the circular backstay of fabrication hole and fabrication hole rhombus backstay, the endoporus center that cover is surveyed in range estimation location whether with cylinder head to be measured on suction valve cone blank hole center have relatively large deviation, perhaps by be arranged on endoporus center that scanning rule detection and location in the suction valve cone blank hole on cylinder head to be measured survey cover whether with cylinder head to be measured on suction valve cone blank hole center have relatively large deviation; When positioning by suction valve cone blank hole rhombus pin, by be arranged on endoporus center that scanning rule detection and location in the fabrication hole on cylinder head to be measured survey cover whether with cylinder head to be measured on the fabrication hole center have relatively large deviation.

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