Die casting appearance deviation detection device

Abstract

The utility model belongs to the technical field of detection equipment, and particularly relates to a die casting appearance deviation detection device which comprises a rack, a positioning pin and a contact type displacement sensor. The rack is used for placing a die casting, the positioning pin is arranged on the rack, and the positioning pin is used for positioning the placing position of the die casting; and the contact type displacement sensor is arranged at the edge position of the rack and is used for measuring the distance between the contact type displacement sensor and the die casting. According to the detection device provided by the utility model, the positioning assembly is arranged to realize accurate placement of parts, the sensor assembly is arranged to automatically measure the boundary dimension of the die casting, and the measurement result is uploaded to the PLC control system, so that whether the boundary dimension of the die casting is qualified or not is automatically detected, and the manual detection cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, and in particular relates to a device for detecting shape deviation of a die casting. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] At present, in the production process of die-casting parts in the production workshop, the external dimensions of the die-casting parts are generally inspected manually to see if they are qualified. If they are qualified, the die-casting parts are automatically transferred to the next process. If they are unqualified, they need to be marked and removed. However, the manual measurement method of die-casting parts on the production line has the problems of large workload and slow measurement speed, and it is also easy to miss inspections and has a low degree of automation.

[0004] At present, there are some methods in the industry to detect the deviation of workpieces through visual scanning, but they are generally very expensive and complicated to debug. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a device for detecting shape deviation of a die casting.

[0006] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0007] The first aspect of the utility model provides a die casting shape deviation detection device, including a stand, a positioning pin and a contact displacement sensor;

[0008] The stand is used for placing the die casting, the positioning pin is arranged on the stand, and the positioning pin is used to locate the placement position of the die casting; the contact displacement sensor is arranged at the edge position of the stand, and the contact displacement sensor is used to measure the distance between it and the die casting.

[0009] Furthermore, the positioning pins arranged at the middle position of the platform include a first positioning pin and a second positioning pin, which are respectively used to position the bottom of the die casting.

[0010] Furthermore, it also includes a third positioning pin and a fourth positioning pin arranged on both sides of the platform, and the third positioning pin and the fourth positioning pin are used to position the positions of both sides of the die casting.

[0011] Furthermore, a contact displacement sensor is provided between the third positioning pin and the fourth positioning pin.

[0012] Furthermore, the contact displacement sensor is fixed on the stand via a support rod.

[0013] Furthermore, the contact displacement sensor is fixed on the stand via an electric telescopic cylinder.

[0014] Furthermore, the cylinder rod of the electric telescopic cylinder is connected to the contact displacement sensor, and the electric telescopic cylinder is used to drive the contact displacement sensor to move in a horizontal direction.

[0015] Furthermore, the contact displacement sensor comprises a main body bracket, a probe bracket, a sensor body and a retractable probe;

[0016] A sensor body is arranged in the main support, and one end of the sensor body is connected to a retractable probe; the retractable probe is arranged in the probe support, and the probe support is connected to the main support; both the probe support and the main support are provided with a through hole for extending the retractable probe out of the support.

[0017] Furthermore, the retractable probe is used to be retracted in the horizontal direction and / or vertical direction.

[0018] Furthermore, the die-casting part is a rear axle body of an automobile.

[0019] One or more of the above technical solutions have the following beneficial effects:

[0020] (1) The detection device provided by the utility model can realize accurate placement of parts by setting a positioning component, and can automatically measure the shape deviation of the die-casting by setting a sensor component. The measurement result is uploaded to the PLC control system, thereby realizing automatic detection of whether the shape dimensions of the die-casting are qualified and reducing the cost of manual inspection.

[0021] (2) The sensors in the present invention are all contact displacement sensors. After the die-casting is placed in place, the retractable probe of the sensor extends out of the bracket to contact the die-casting for measurement. By arranging the sensor probe in the bracket, the occurrence of problems such as bumping against the sensor when the die-casting is placed is avoided.

[0022] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0024] Figure 1 This is a structural diagram of a die-casting shape deviation detection device in Example 1.

[0025] Figure 2 This is a schematic diagram of the die casting placement of Example 1.

[0026] Figure 3 Schematic diagram of the contact displacement sensor of Example 1.

[0027] Figure 4 This is a structural diagram of the electric telescopic cylinder of Example 1.

[0028] Figure 5 This is a schematic diagram of the extension and retraction of the electric telescopic cylinder of Example 1.

[0029] Figure 6 Schematic diagram of the extension and retraction of the sensor probe of Example 1.

[0030] Figure 7 This is a structural diagram of the retractable ranging sensor of Example 1.

[0031] In the figure, 1. stand, 2. positioning assembly, 201 first positioning pin, 202 second positioning pin, 203 third positioning pin, 204 fourth positioning pin, 3. sensor assembly, 301 first contact displacement sensor, 302 second contact displacement sensor, 303 third contact displacement sensor, 304 fourth contact displacement sensor, 4. support rod, 5. electric telescopic cylinder, 6. main body bracket, 7. probe bracket, 8. telescopic rod, 9. sensor probe, 10. die casting. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Embodiment 1

[0034] like Figure 1 As shown, the utility model provides a die casting shape deviation detection device, including a stand 1, a positioning component 2 and a sensor component 3;

[0035] A die casting 10 is placed on the stand 1, and a positioning assembly 2 is arranged in the middle of the stand 1, and the positioning assembly 2 is used to position the die casting 10;

[0036] The sensor assembly 3 is arranged at the edges of the platform 1, and is used to measure the distance between the sensor assembly 3 and the die casting. Specifically: after the die casting is placed in place, the sensor assembly is used to extend the retractable probe of the sensor to contact the die casting to achieve displacement measurement.

[0037] As a further technical solution, the positioning assembly 2 includes a first positioning pin 201 and a second positioning pin 202, which are arranged at the middle position of the stand and are used to perform two-point positioning on the bottom of the die casting;

[0038] The positioning assembly 2 further includes a third positioning pin 203 and a fourth positioning pin 204; the third positioning pin 203 and the fourth positioning pin 204 are arranged at one end of the stand 1 for positioning the placement positions of both sides of the die casting.

[0039] The location and quantity of the positioning components 2 can be selected as needed and are not limited to the location and quantity in this embodiment.

[0040] As a further technical solution, the sensor component 3 is a contact displacement sensor, such as Figure 3 , Figure 4 As shown in (a) and (b), the contact displacement sensor includes a main body bracket 6, a probe bracket 7, a sensor body 8 and a retractable probe 9;

[0041] A sensor body 8 is provided in the main bracket 6, and one end of the sensor body 8 is connected to a retractable probe 9; the retractable probe 9 is arranged in a probe bracket 7, and the probe bracket 7 is connected to the main bracket 6; both the probe bracket 7 and the main bracket 6 are provided with a through hole for extending the retractable probe 9 out of the bracket.

[0042] In this embodiment, the model of the contact displacement sensor can be selected according to needs. The retractable probe is arranged inside the bracket. After the die-casting is placed in place, it is extended outside the bracket for measurement. This can prevent the die-casting from colliding with the sensor probe and avoid damage to the sensor probe. The retractable probe can be retracted in the horizontal direction and / or vertical direction.

[0043] The contact displacement sensor is installed on the bench and precisely fits the measuring point of the die-casting in the form of contact (the measurement error is within ±0.1mm). After the retractable probe contacts the surface of the workpiece driven by the telescopic rod, the distance from the sensor probe to the measuring point of the die-casting is obtained; the detection distance of the sensor is transmitted to the control system for analysis and processing to distinguish between out-of-tolerance parts and qualified parts.

[0044] By setting the standard part distance in the control system, the sensor's detection distance is compared with the standard part distance, the true deviation value is output, and then the deviation value is compared to see if it is within the allowable range to distinguish between out-of-tolerance parts and qualified parts.

[0045] The standard part distance refers to the distance between the remaining standard die-casting parts detected by the displacement sensors at various positions after the standard die-casting parts with qualified external dimensions are placed on the bench.

[0046] As a further technical solution, the sensor assembly 3 can be directly fixed on the test bench, or it can be fixed on the test bench through a support rod and / or an electric telescopic cylinder; the setting position and fixing method of the sensor assembly 3 can be selected and set according to the structure of the die-casting, and is not limited to the placement position and fixing method in this embodiment; in this embodiment, the setting position of the sensor is explained by taking the die-casting to be tested as the rear axle body of the automobile, and the die-casting to be tested can also be the front cover of the automobile, etc.

[0047] Specifically: a first contact displacement sensor is provided between the third positioning pin and the fourth positioning pin. The first contact displacement sensor is provided at the reference point position and is used to detect the actual placement position deviation of the die casting.

[0048] There are three first contact displacement sensors 301 , which are arranged on the stand at intervals. When the die-casting is placed on the stand, the telescopic probe of the first contact displacement sensor is extended horizontally to measure the actual placement position deviation of the die-casting.

[0049] The second contact displacement sensor 302 is arranged at one end of the third positioning pin and the fourth positioning pin of the stand, and the telescopic probe of the second contact displacement sensor is vertically upward; the first contact displacement sensor and the second contact displacement sensor are both directly fixed on the stand.

[0050] The bottom of the third contact displacement sensor 303 located on both sides of the platform is fixed to the platform through the support rod 4, and the side of the fourth contact displacement sensor 304 located at the other end of the platform is fixed to the platform through the electric telescopic cylinder 5; the setting height of the sensor can be selected according to actual needs.

[0051] like Figure 5 , Figure 6 , Figure 7 As shown, the cylinder rod of the electric telescopic cylinder 5 is connected to the sensor, and the electric telescopic cylinder is used to drive the sensor to move in the horizontal direction.

[0052] In this embodiment, the sensor located at one end of the platform is movable, and the sensor is driven to move in the horizontal direction by an electric telescopic cylinder.

[0053] In this embodiment, the sensor at one end of the stand may interfere with the measuring position when placing the parts, so the setting position is movable, and the measuring point sensor is driven to the measuring position by an electric telescopic cylinder.

[0054] The working principle of the utility model is:

[0055] 1. The die casting to be tested is placed on the bench by a robot, and precise positioning in the three directions of XYZ axis is achieved through the four positioning pins on the bench.

[0056] 2. The retractable probe of the first contact displacement sensor of the reference point is extended to measure the actual position of the die casting to be measured, and the measurement data is uploaded to the PLC control system; the PLC control system compares the actual position with the reference position, calculates the position deviation, and if the position deviation is within the allowable range, it is determined that the part has been placed in place; the PLC control system sends a control signal to the sensor at the measuring point.

[0057] 3. After the die casting to be tested is placed in place, the second, third and fourth contact displacement sensors extend out of the bracket under the action of the solenoid valve according to the control signal of the PLC control system, and contact and detect the die casting to be tested, and detect the displacement between them and each measuring point on the die casting; and upload the measurement data to the PLC control system; the PLC control system compares the actual measured displacement with the displacement distance of the standard part and calculates the dimensional deviation value.

[0058] 4. After the measurement is completed, the retractable probe of the sensor retracts under the action of the solenoid valve; the PLC control system summarizes the analog data of the data deviation value to the host computer, and the host computer generates a measurement report and can also issue real-time warnings based on the measurement results.

[0059] 5. Compare the deviation value with the actual allowable deviation value. If the dimensional deviation value is within the set threshold, it is a qualified part and enters the next process. If it is outside the deviation range, it is an out-of-tolerance part and needs to be returned for repair.

[0060] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A die casting shape deviation detection device, characterized in that: It includes a stand, a positioning pin and a contact displacement sensor; The stand is used for placing the die casting, the positioning pin is arranged on the stand, and the positioning pin is used to locate the placement position of the die casting; the contact displacement sensor is arranged at the edge position of the stand, and the contact displacement sensor is used to measure the distance between it and the die casting.

2. A die casting shape deviation detection device according to claim 1, characterized in that: The positioning pins arranged at the middle position of the platform include a first positioning pin and a second positioning pin, which are respectively used to position the bottom of the die casting.

3. A die casting shape deviation detection device according to claim 1, characterized in that: It also includes a third positioning pin and a fourth positioning pin arranged on both sides of the platform, and the third positioning pin and the fourth positioning pin are used to position the positions of both sides of the die casting.

4. A die casting shape deviation detection device according to claim 3, characterized in that: A contact displacement sensor is provided between the third positioning pin and the fourth positioning pin.

5. The die casting shape deviation detection device according to claim 1, characterized in that: The contact type displacement sensor is fixed on the stand through a support rod.

6. A die casting shape deviation detection device according to claim 1, characterized in that: The contact type displacement sensor is fixed on the platform through an electric telescopic cylinder.

7. A die casting shape deviation detection device according to claim 6, characterized in that: The cylinder rod of the electric telescopic cylinder is connected to the contact displacement sensor, and the electric telescopic cylinder is used to drive the contact displacement sensor to move in a horizontal direction.

8. A die casting shape deviation detection device according to claim 1, characterized in that: The contact displacement sensor comprises a main body bracket, a probe bracket, a sensor body and a retractable probe; A sensor body is arranged in the main support, and one end of the sensor body is connected to a retractable probe; the retractable probe is arranged in the probe support, and the probe support is connected to the main support; both the probe support and the main support are provided with a through hole for extending the retractable probe out of the support.

9. A die casting shape deviation detection device according to claim 8, characterized in that: The retractable probe is used for retracting in the horizontal direction and / or the vertical direction.

10. The die casting shape deviation detection device according to claim 1, characterized in that: The die casting is a rear axle body of an automobile.

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