Valve body symmetry detection tooling

Abstract

The utility model belongs to fuel injection valve manufacturing equipment field, propose a kind of valve body detection symmetry degree frock, including fixed base, the bottom of fixed base is provided with support seat, positioning groove for placing fixed base is provided on support seat, 2 workpiece positioning pins are provided on fixed base, workpiece positioning pin is used to cooperate with the valve hole of workpiece, the opposite side of fixed base is provided with upper pressing plate, and upper pressing plate is connected with fixed base by a pair of clamping positioning pin, detection jack hole corresponding to the valve hole of workpiece is provided on upper pressing plate, detection pin is provided in detection jack hole. The utility model is installed fixed base by support seat with inclination angle, two symmetrical valve holes of workpiece positioning pin and valve body cooperate, make the hole to be detected of valve body vertically upward;Clamping positioning pin provides clamping direction for upper pressing plate to fix valve body, by detection pin vertically inserted detection jack hole and inquired into the hole to be detected of valve body, and detection is completed. The device can unified measuring means, and improve measurement efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of fuel injection valve manufacturing equipment, and in particular relates to a tooling for detecting the symmetry of valve bodies. Background Technology

[0002] Traditional methods for measuring fuel injection valve seats involve using an image sensor to measure symmetry to 0.1. This often results in inconsistent data, as the same inspector may measure a single product twice, or multiple times by different inspectors. Furthermore, this method is affected by factors such as workpiece placement and the different measurement points taken by the inspector, impacting measurement efficiency. To address these issues, we have designed a new measuring fixture. Utility Model Content

[0003] This utility model addresses the aforementioned technical problems in fuel injection valve seat testing by proposing a valve body symmetry testing fixture that is rationally designed, simple in structure, and conducive to improving measurement efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The valve body symmetry testing fixture provided by this utility model includes a fixed seat, a support seat at the bottom of the fixed seat, a positioning groove for placing the fixed seat on the support seat, the positioning groove having an L-shaped cross-section and both of its groove surfaces being inclined surfaces, two workpiece positioning pins on the fixed seat for engaging with the valve holes of the workpiece, an upper pressure plate on the opposite side of the fixed seat, the upper pressure plate being connected to the fixed seat by a pair of clamping positioning pins, a detection insertion hole corresponding to the valve hole of the workpiece on the upper pressure plate, and a detection pin being installed in the detection insertion hole.

[0005] Preferably, the workpiece positioning pin includes a plug section that engages with a plug-in through hole provided on the fixed base, and the head end of the plug section is provided with a positioning section, the diameter of which is smaller than the diameter of the plug section.

[0006] Preferably, both the fixed base and the upper pressure plate are provided with positioning through holes for cooperating with the clamping positioning pin, and the diameter of the clamping positioning pin is larger than that of the workpiece positioning pin.

[0007] Preferably, the upper pressure plate has an observation hole in the middle that is on the same side as the detection socket.

[0008] Preferably, the bottom of the positioning groove is provided with a countersunk groove.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0010] This utility model provides a valve body symmetry testing fixture. It employs a support base to install a fixed base at an inclined angle. A workpiece positioning pin engages with two symmetrical valve holes in the valve body, ensuring the test hole faces vertically upwards. The clamping positioning pin provides clamping direction for the upper pressure plate to fix the valve body. The test pin is vertically inserted into the test hole and protrudes into the test hole of the valve body to complete the test. This device standardizes measurement methods, improves measurement efficiency, saves measurement time and costs, and is rationally designed, simple in structure, and highly practical, making it suitable for large-scale promotion. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A working diagram of the valve body symmetry detection fixture provided in the embodiment;

[0013] Figure 2 A cross-sectional view of the valve body symmetry detection fixture provided in the embodiment;

[0014] Figure 3 An exploded view of the valve body symmetry testing fixture provided in the embodiment;

[0015] Figure 4 A bottom view of the workpiece provided for an embodiment;

[0016] In the above figures: 1. Fixed base; 2. Support base; 3. Positioning groove; 4. Workpiece positioning pin; 41. Insertion section; 42. Positioning section; 5. Upper pressure plate; 6. Clamping positioning pin; 7. Inspection insertion hole; 8. Inspection pin; 9. Insertion through hole; 10. Positioning through hole; 11. Observation hole; 12. Countersunk groove; 13. Workpiece. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Examples, such as Figures 1-4 As shown, the valve body symmetry testing fixture provided by this utility model includes a fixed base 1, a support base 2 at the bottom of the fixed base 1, a positioning groove 3 for placing the fixed base 1 on the support base 2, the positioning groove 3 having an L-shaped cross-section and both of its groove surfaces being inclined surfaces, two workpiece positioning pins 4 on the fixed base 1, the workpiece positioning pins 4 being used to cooperate with the valve holes of the workpiece, the valve holes on the same plane having directionality, an upper pressure plate 5 on the opposite side of the fixed base 1, the upper pressure plate 5 being connected to the fixed base 1 by a pair of clamping positioning pins 6, the upper pressure plate 5 having a detection insertion hole 7 corresponding to the valve hole of the workpiece, and a detection pin 8 being installed in the detection insertion hole 7.

[0020] Specifically, in this device, the support base 2 is installed at an inclined angle on the fixed base 1, providing a support foundation for the fixed base 1. The fixed base 1 provides a pair of workpiece positioning pins 4 to cooperate with the two symmetrical valve holes of the workpiece, so that the hole to be tested on the workpiece 13 is vertically upward. The clamping positioning pin 6 provides the clamping direction for the upper pressure plate 5 to fix the workpiece. The detection pin 8 is vertically inserted into the detection socket 7 and probes into the hole to be tested on the workpiece 13 to complete the detection. According to the detection requirements of the hole to be tested, the diameter of the detection pin 8 is generally set slightly smaller than that of the hole to be tested on the workpiece, leaving a precision margin of 0.1. On the one hand, the detection indicators of the workpiece 13, such as the actual depth and resistance, are obtained by the insertion of the detection pin 8 into the hole to be tested. On the other hand, the corresponding detection indicators are obtained by the verticality of the detection pin 8 in the vertical direction. This unifies the measurement method, improves the measurement efficiency, saves measurement time and cost, and has a reasonable design, simple structure, and strong practicality.

[0021] To improve the utilization rate of this testing fixture, the workpiece positioning pin 4 provided by this utility model includes an insertion section 41, which mates with an insertion through hole 9 provided on the fixed base 1. A positioning section 42 is provided at the head end of the insertion section 41, and the diameter of the positioning section 42 is smaller than the diameter of the insertion section 41. The insertion section 41 facilitates the replacement of workpiece positioning pins 4 with workpieces of specific specifications. For example, the diameter of the positioning section 42 of a specific workpiece positioning pin 4 can be made to match the diameter of the valve hole, thereby allowing this testing fixture to better adapt to the testing needs of different valve bodies.

[0022] To facilitate workpiece clamping, both the fixed base 1 and the upper pressure plate 5 provided in this invention are equipped with positioning through holes 10 for engaging with the clamping positioning pin 6. The positioning through holes 10 and the clamping positioning pin 6 can be flexibly inserted, allowing the upper pressure plate 5 to move quickly and provide ample space for clamping the workpiece 13. The workpiece 13 can be clamped simply by quickly pressing the upper pressure plate 5 downwards, making the operation convenient and highly practical. Furthermore, the diameter of the clamping positioning pin 6 is larger than that of the workpiece positioning pin 4. By providing a sufficiently strong clamping positioning pin 6, the clamping reliability between the upper pressure plate 5 and the fixed base 1 can be guaranteed, and to a certain extent, the device can have a longer actual service life.

[0023] To improve detection efficiency, the upper pressure plate 5 provided by this utility model has an observation hole 11 on the same side as the detection insertion hole 7 in the middle. A micro probe can be inserted into the observation hole 11 to visually observe the fit between the detection pin 8 and the hole to be detected. Alternatively, the observation hole 11 can be enlarged to allow manual observation within the visible range.

[0024] In order to reduce the impact of machining errors at the root of the positioning groove 3 on the assembly accuracy of the fixed seat 1, the bottom of the positioning groove 3 provided by this utility model is provided with a countersunk groove 12. The countersunk groove 12 provides sufficient contact conditions for the root of the fixed seat 1 to ensure its assembly accuracy, thereby helping to reduce detection errors.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A fixture for detecting the symmetry of a valve body, comprising a fixed base, characterized in that, The bottom of the fixed base is provided with a support base, and the support base is provided with a positioning groove for placing the fixed base. The positioning groove has an L-shaped cross-section and both of its groove surfaces are inclined. The fixed base is provided with two workpiece positioning pins, which are used to cooperate with the valve holes of the workpiece. An upper pressure plate is provided on the opposite side of the fixed base. The upper pressure plate is connected to the fixed base by a pair of clamping positioning pins. The upper pressure plate is provided with a detection insertion hole corresponding to the valve hole of the workpiece, and a detection pin is provided in the detection insertion hole.

2. The valve body symmetry detection fixture according to claim 1, characterized in that, The workpiece positioning pin includes a plug section that engages with a plug-in through hole on a fixed base. The head end of the plug section is provided with a positioning section, the diameter of which is smaller than the diameter of the plug section.

3. The valve body symmetry detection fixture according to claim 2, characterized in that, Both the fixed base and the upper pressure plate are provided with positioning through holes for cooperating with the clamping positioning pin, and the diameter of the clamping positioning pin is larger than that of the workpiece positioning pin.

4. The valve body symmetry detection fixture according to claim 3, characterized in that, The upper pressure plate has an observation hole in the middle, which is on the same side as the detection socket.

5. The valve body symmetry detection fixture according to claim 4, characterized in that, The bottom of the positioning groove is provided with a countersunk groove.

Images