Longitudinal beam and wheel cover integrated die casting comprehensive testing fixture

Abstract

The utility model belongs to the field of vehicle body die casting, and particularly relates to a comprehensive testing fixture for a longitudinal beam and wheel cover integrated die casting, which comprises a base, parallel racks are arranged on the base, n is greater than or equal to 2, fixing systems are correspondingly arranged on the racks, and the fixing systems respectively fix a blank workpiece and a finished product workpiece by taking the corresponding racks as reference; each set of fixing system comprises at least two positioning pins which are arranged along the outer edge of a corresponding workpiece and used for pre-positioning the workpiece, each set of fixing system further comprises at least three groups of positioning surfaces and pressing devices which are correspondingly arranged, and the pressing devices abut against the workpiece until the workpiece is attached to the corresponding positioning surfaces so as to execute workpiece fixing operation; the positioning surface and the positioning pin are telescopically arranged on the rack so as to ensure that a finished workpiece and a blank workpiece are not interfered with each other when being positioned; the barrier that only one set of workpieces can be detected by one set of detection tool is broken, the cost of the detection tool is reduced, the labor intensity of operators is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle body die casting, in particular to a comprehensive inspection tool for longitudinal beam and wheel cover integrated die casting parts. Background Art

[0002] For longitudinal beam wheel covers or other thin-walled body die-casting parts, product deformation is relatively serious, product consistency is poor, and the dimensional error of the finished product after machining will affect the subsequent assembly process or product performance. Therefore, it is necessary to regularly inspect the outline size of the blank.

[0003] A reasonable inspection frequency can reduce batch quality risks and the risk of defective products flowing out, but the blank datum and the finished product datum are not the same datum. Existing fixture design solutions mostly use two or even more sets of fixtures to deal with two different datum parts. The fixture development cost is high and the inspection efficiency is low.

[0004] Chinese patent CN204188146U discloses a body-in-white inspection fixture mechanism, which includes a long measuring frame and bases located at both ends of the measuring frame. However, this technical solution only inspects finished parts, has a relatively simple structure, low integration, and low inspection efficiency.

[0005] Therefore, how to reduce the cost of developing inspection tools and improve inspection efficiency is an urgent problem that technicians in this field need to solve. Utility Model Content

[0006] To address the above-mentioned issues, the present invention proposes a comprehensive inspection fixture for die-casting of longitudinal beams and wheelhouses, comprising a base, on which n mutually parallel racks are arranged, where n ≥ 2, and each rack is provided with a corresponding fixing system. The fixing system uses the corresponding rack as a reference to fix the blank workpiece and the finished workpiece respectively.

[0007] Each fixing system includes at least two locating pins arranged along the outer edge of the corresponding workpiece to pre-position the workpiece, and each fixing system also includes at least three sets of positioning surfaces and clamping devices arranged in a corresponding manner, and the clamping devices press the workpiece until the workpiece is in contact with the corresponding positioning surfaces to perform the workpiece fixing operation;

[0008] The positioning surface and the positioning pin can be arranged telescopically on the frame to ensure that the finished workpiece and the blank workpiece do not interfere with each other when positioning;

[0009] The two fixing systems share a common detection device, which is arranged along the length of the frame and is used to perform workpiece detection operations.

[0010] Preferably, a rectangular hole is provided on the end face of the frame facing the workpiece, a through hole is provided in the rectangular hole, a first slide column is arranged in the through hole along the axial sliding direction, one end of the first slide column is connected to the handle, and the other end is connected to the positioning surface, the positioning surface is a rectangular block, and the outer contour is adapted to the inner contour of the rectangular hole.

[0011] Preferably, a positioning hole is provided on the end surface of the frame facing the workpiece, and a positioning pin is axially slidably arranged in the positioning hole;

[0012] A slide groove is provided on the side of the frame, and the slide groove passes through the positioning hole to form a "cross" shaped channel structure. The slider slides along the length direction of the slide groove until it contacts the end of the positioning pin, driving the positioning pin to push out of the positioning hole to perform the pre-positioning operation of the workpiece;

[0013] A limiting member is arranged on the contact surface of the positioning pin and the positioning hole to limit the sliding displacement of each other along the axial direction.

[0014] Preferably, the positioning hole is a countersunk hole, and the positioning pin includes a second sliding column and an axis pin head. The second sliding column is coaxially threaded with the axis pin head to form a three-section stepped shaft structure, and the middle section has the largest diameter. When the slider is not in contact with the positioning pin, the stepped shaft is pre-embedded in the countersunk hole.

[0015] A limiting member is arranged on the contact surface between the second sliding post and the positioning hole to limit the sliding displacement of each other in the axial direction.

[0016] Preferably, the limiting member includes a positioning block and a positioning groove, the inner wall of the positioning hole is provided with a positioning groove along the axial direction, the side wall of the second sliding column is provided with a positioning block along the radial direction, and the positioning block and the positioning groove form a guiding fit along the axial direction of the positioning hole.

[0017] Preferably, the embedded end corner of the stepped shaft is provided with a chamfer, and the end of the slider is a wedge-shaped structure that matches the chamfer.

[0018] Preferably, the clamping device is a manual clamp, one end of which is rotatably arranged on the frame, and the other end is pressed and fitted on one side of the workpiece until the other side of the workpiece is in contact with the positioning surface.

[0019] Preferably, the manual clamp includes a connecting elbow joint, which is L-shaped. The connecting elbow joint is hinged on the frame. One end of the connecting elbow joint is connected to the handle pressure handle, and the other end is connected to the clamping block. The connecting elbow joint rotates around the hinge point until the clamping block is tightly fitted with the workpiece.

[0020] Preferably, the detection device includes a contour detection device and a flushness card matching detection device, which are used to detect the outer contour of the workpiece;

[0021] The contour detection device includes a reference plate, and the reference plate cooperates with a matching contour detection go / no-go gauge to perform a detection operation.

[0022] Preferably, the detection device further includes a diameter go / no-go gauge and a position reference pin for detecting the deviation of the workpiece hole; the position reference pin performs a reference bottom hole detection operation.

[0023] Beneficial effects

[0024] 1. The utility model arranges a sleeve fixing system to fix the rough workpiece and the finished workpiece respectively, and the sleeve fixing system shares a set of detection devices. In this way, not only can different workpieces be fixed well respectively, but the sleeve inspection fixture can also handle different reference parts, with high integration and high measurement efficiency. The sleeve fixing system can be retracted and arranged on the frame, thereby ensuring that the finished workpiece and the rough workpiece do not interfere with each other when positioning, thereby breaking the barrier that one set of inspection fixtures can only detect one set of workpieces. Not only does it reduce the cost of the inspection fixture, but it is also obvious that the rough and machined size inspection can be completed by moving the workpiece once and placing it on the inspection fixture, reducing the labor intensity of the operator and improving the inspection efficiency.

[0025] 2. Furthermore, the positioning surface and the positioning pin can be telescopically arranged on the frame. In practice, any device on the market that can achieve this effect for this telescopic arrangement structure falls within the scope of protection of this application. Two embodiments are specifically proposed here. The first embodiment is that through the sliding arrangement of the positioning hole and the positioning pin, and the sliding friction cooperation between the slider and the positioning pin, the slider slides along the length direction of the slide groove until it contacts the end of the positioning pin, driving the positioning pin to push out of the positioning hole to perform the workpiece pre-positioning operation; the second embodiment is that through the staggered and aligned rectangular hole and the positioning surface, the positioning surface is protruded or embedded in the rectangular hole, thereby realizing the telescopic positioning surface.

[0026] 3. Furthermore, by arranging the positioning blocks and positioning grooves, not only the sliding directions of the positioning holes and the positioning pins are further restricted, but also the positioning pins and the positioning holes are prevented from slipping during the sliding process.

[0027] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures indicated in the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It shows a schematic diagram of a comprehensive inspection tool in an embodiment of the present utility model;

[0030] Figure 2 It shows a schematic diagram of a comprehensive inspection fixture system in an embodiment of the present utility model;

[0031] Figure 3 A schematic diagram of the retractable arrangement of the positioning surface in an embodiment of the present utility model is shown;

[0032] Figure 4 Shown Figure 2 Schematic diagram of the cutaway from the middle AA perspective;

[0033] Figure 5 A schematic diagram of the retractable arrangement of the positioning pins in an embodiment of the present utility model is shown;

[0034] Figure 6 A schematic diagram of the cooperation between the pressing device and the positioning surface in an embodiment of the present utility model is shown.

[0035] In the figure,

[0036] 1. Base;

[0037] n1, rack;

[0038] n2. Fixing system;

[0039] 12. Blank fixing system; 120. Blank positioning pin; 121. Blank positioning surface; 122. Blank pressing device;

[0040] 22. Finished product fixing system; 220. Finished product positioning pin; 221. Finished product positioning surface; 222. Finished product pressing device;

[0041] n201, positioning hole; n202, slide groove; n203, slider; n204, second slide column; n205, shaft pin head;

[0042] n2011, positioning groove; n2041, positioning block;

[0043] n210, first slide column; n211, rectangular hole;

[0044] n220, connecting elbow; n221, handle pressure handle; n222, tightening block. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0046] refer to Figure 1 , Figure 1 A schematic diagram of a comprehensive inspection fixture in an embodiment of the present invention is shown. As can be clearly seen from the schematic diagram, a comprehensive inspection fixture for die-casting of a longitudinal beam and wheelhouse is provided, comprising a base 1, on which are arranged n mutually parallel racks n1, where n ≥ 2, and each rack n1 is correspondingly provided with a fixing system n2, which is based on the corresponding rack n1 and respectively fixes the rough workpiece and the finished workpiece.

[0047] Each fixing system n2 includes at least two locating pins arranged along the outer edge of the corresponding workpiece to pre-position the workpiece. Each fixing system n2 also includes at least three sets of positioning surfaces and clamping devices arranged in a corresponding manner. The clamping devices press the workpiece until the workpiece is in contact with the corresponding positioning surfaces to perform the workpiece fixing operation.

[0048] The positioning surface and the positioning pins can be arranged telescopically on the frame n1 to ensure that the finished workpiece and the rough workpiece do not interfere with each other when positioning;

[0049] The two fixing systems n2 share a common detection device, which includes a contour detection device and a flushness card matching detection device, used to detect the outer contour of the workpiece;

[0050] The contour detection device includes a reference plate, which cooperates with a matching contour detection go / no-go gauge to perform the detection operation.

[0051] The detection device also includes a diameter go / no-go gauge and a position reference pin for detecting the deviation of the workpiece hole; the position reference pin performs the reference bottom hole detection operation.

[0052] The detection device is arranged along the length direction of the frame n1 and is used to perform workpiece detection operations.

[0053] The present invention arranges n sets of fixing systems n2 to fix the blank workpiece and the finished workpiece respectively, and the n sets of fixing systems n2 share a set of detection devices. In this way, not only can different workpieces be fixed well respectively, but n sets of inspection fixtures can also cope with n different reference parts, with high integration and high measurement efficiency. The n sets of fixing systems n2 can be telescopically arranged on the frame n1, thereby ensuring that the finished workpiece and the blank workpiece do not interfere with each other when positioning, thereby breaking the barrier that one set of inspection fixtures can only detect one set of workpieces. Not only does it reduce the cost of the inspection fixture, but it is also obvious that the blank and machined size inspection can be completed by moving the workpiece once and placing it on the inspection fixture, reducing the labor intensity of the operator and improving the inspection efficiency.

[0054] refer to Figure 2 , Figure 2 A schematic diagram of a comprehensive inspection fixture system in an embodiment of the present invention is shown. As can be clearly seen from the schematic diagram, in order to facilitate understanding, the fixing system n2 can be differentiated according to the shape of the workpiece in actual production. Here, we define the fixing of the blank workpiece as the blank fixing system 12, which includes two blank positioning pins 120, three sets of blank positioning surfaces 121 and a blank pressing device 122.

[0055] By analogy, the finished workpiece is fixed with a finished product fixing system 22 , which includes two finished product positioning pins 220 , three groups of finished product positioning surfaces 221 and a finished product pressing device 222 .

[0056] Furthermore, in order to prevent the finished product fixing system 22 and the blank fixing system 12 from interfering with each other when they are fixed to each other, it is necessary to further set the above-mentioned fixing systems to a retractable state.

[0057] refer to Figure 3 and Figure 4 , Figure 3 A schematic diagram of the retractable arrangement of the positioning surface in an embodiment of the present utility model is shown; Figure 4 Shown Figure 3 Schematic diagram of the cutaway from the middle AA perspective; Figure 2 It can be clearly seen that the retractable arrangement of the positioning surface is as follows: a rectangular hole n211 is provided on the end face of the frame n1 facing the workpiece, a through hole is provided in the rectangular hole n211, a first slide post n210 is arranged axially sliding in the through hole, one end of the first slide post n210 is connected to the handle, and the other end is connected to the positioning surface, the positioning surface is a rectangular block, and its outer contour is adapted to the inner contour of the rectangular hole n211.

[0058] refer to Figure 5 , Figure 5A schematic diagram of the retractable arrangement of the locating pin in an embodiment of the present invention is shown; as can be clearly seen from the schematic diagram, the retractable arrangement of the locating pin is as follows: a locating hole n201 is provided on the end face of the frame n1 facing the workpiece, and a locating pin is axially slidably arranged in the locating hole n201; the locating hole n201 is a countersunk hole, and the locating pin includes a second slide post n204 and an axial pin head n205, and the coaxial thread in the second slide post n204 is connected to the axial pin head n205 to form a three-section stepped shaft structure, with the middle section having the largest diameter. When the slider n203 is not in contact with the locating pin, the stepped shaft is pre-embedded in the countersunk hole;

[0059] A slide groove n202 is provided on the side of the frame n1. The slide groove n202 passes through the positioning hole n201 to form a "cross"-shaped channel structure. The slider n203 slides along the length direction of the slide groove n202 until it contacts the end of the positioning pin, driving the positioning pin to push out of the positioning hole n201 to perform the pre-positioning operation of the workpiece. The corner of the embedded end of the stepped shaft is provided with a chamfer, and the end of the slider n203 is a wedge-shaped structure to cooperate with it.

[0060] Furthermore, the positioning surface and the positioning pin can be telescopically arranged on the frame. Practically speaking, any device on the market that can achieve this effect for this telescopic arrangement structure falls within the scope of protection of this application. Two embodiments are specifically proposed here. The first embodiment is that through the sliding arrangement of the positioning hole n201 and the positioning pin, and the sliding friction cooperation between the slider n203 and the positioning pin, the slider n203 slides along the length direction of the slide groove n202 until it contacts the end of the positioning pin, driving the positioning pin to push out of the positioning hole n201 to perform the workpiece pre-positioning operation; the second embodiment is that through the staggered and aligned rectangular hole n211 and the positioning surface, the positioning surface protrudes or is embedded in the rectangular hole n211, thereby realizing the telescopic positioning surface.

[0061] A limiting member is arranged on the contact surface between the second sliding column n204 and the positioning hole n201 to limit the sliding displacement of each other in the axial direction;

[0062] The limiting part includes a positioning block n2041 and a positioning groove n2011. The inner wall of the positioning hole n201 is provided with a positioning groove n2011 along the axial direction. The side wall of the second sliding column n204 is provided with a positioning block n2041 along the radial direction. The positioning block n2041 and the positioning groove n2011 form a guiding fit along the axial direction of the positioning hole n201.

[0063] Furthermore, by arranging the positioning block n2041 and the positioning groove n2011, not only the sliding direction of the positioning hole n201 and the positioning pin is further restricted, but also the positioning pin and the positioning hole n201 are prevented from slipping during the sliding process.

[0064] refer to Figure 6 , Figure 6A schematic diagram of the clamping device and the positioning surface in an embodiment of the present invention is shown. This diagram clearly shows that the clamping device is a manual clamp, one end of which is pivotally mounted on the frame n1 and the other end is pressed against one side of the workpiece until the other side of the workpiece is in contact with the positioning surface. The manual clamp includes an L-shaped connecting toggle n220, which is hinged to the frame n1. One end of the connecting toggle n220 is connected to a handle n221, and the other end is connected to a clamping block n222. The connecting toggle n220 pivots about the hinge point until the clamping block n222 is pressed against the workpiece.

[0065] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A comprehensive inspection fixture for longitudinal beam wheel housing integrated die casting, characterized in that: The invention comprises a base (1), wherein n mutually parallel racks (n1) are arranged on the base (1), wherein n≥2, and each rack (n1) is correspondingly provided with a fixing system (n2), wherein the fixing system (n2) fixes a blank workpiece and a finished workpiece respectively with the corresponding rack (n1) as a reference; Each fixing system (n2) includes at least two positioning pins arranged along the outer edge of the corresponding workpiece to pre-position the workpiece, and each fixing system (n2) also includes at least three sets of positioning surfaces and clamping devices arranged in correspondence with each other, the clamping devices pressing the workpiece until the workpiece is in contact with the corresponding positioning surfaces to perform the workpiece fixing operation; The positioning surface and the positioning pin can be arranged telescopically on the frame (n1) to ensure that the finished workpiece and the blank workpiece do not interfere with each other when positioning; The two fixing systems (n2) share a common detection device, which is arranged along the length direction of the frame (n1) and is used to perform workpiece detection operations.

2. A comprehensive inspection fixture for longitudinal beam and wheelhouse integrated die casting according to claim 1, characterized in that: A rectangular hole (n211) is provided on the end face of the frame (n1) facing the workpiece, a through hole is provided in the rectangular hole (n211), a first slide column (n210) is arranged in the through hole along the axial sliding direction, one end of the first slide column (n210) is connected to the handle, and the other end is connected to the positioning surface, the positioning surface is a rectangular block, and the outer contour is adapted to the inner contour of the rectangular hole (n211).

3. The comprehensive inspection fixture for longitudinal beam and wheelhouse integrated die casting according to claim 1, characterized in that: A positioning hole (n201) is provided on the end surface of the machine frame (n1) facing the workpiece, and a positioning pin is axially slidably arranged in the positioning hole (n201); A slide groove (n202) is provided on the side of the frame (n1), and the slide groove (n202) passes through the positioning hole (n201) to form a "cross"-shaped channel structure. The slider (n203) slides along the length direction of the slide groove (n202) until it contacts the end of the positioning pin, driving the positioning pin to eject the positioning hole (n201) to perform a pre-positioning operation of the workpiece; A limiting member is arranged on the contact surface between the positioning pin and the positioning hole (n201) to limit the sliding displacement of each other along the axial direction.

4. A comprehensive inspection fixture for longitudinal beam and wheelhouse integrated die casting according to claim 3, characterized in that: The positioning hole (n201) is a countersunk hole, and the positioning pin includes a second sliding column (n204) and an axis pin head (n205). The second sliding column (n204) is coaxially threaded with the axis pin head (n205) to form a three-section stepped shaft structure, and the middle section has the largest diameter. When the slider (n203) is not in contact with the positioning pin, the stepped shaft is pre-buried in the countersunk hole. A limiting member is arranged on the contact surface between the second sliding column (n204) and the positioning hole (n201) to limit the sliding displacement of each other in the axial direction.

5. The comprehensive inspection fixture for integral die casting of longitudinal beam and wheelhouse according to claim 4, characterized in that: The limiting component includes a positioning block (n2041) and a positioning groove (n2011); the inner wall of the positioning hole (n201) is provided with a positioning groove (n2011) along the axial direction; the side wall of the second sliding column (n204) is provided with a positioning block (n2041) protruding along the radial direction; the positioning block (n2041) and the positioning groove (n2011) form a guiding fit along the axial direction of the positioning hole (n201).

6. A comprehensive inspection tool for longitudinal beam and wheelhouse integrated die casting according to claim 4, characterized in that: The embedded end corner of the stepped shaft is provided with a chamfer, and the end of the slider (n203) is a wedge-shaped structure that matches the chamfer.

7. The comprehensive inspection fixture for longitudinal beam and wheelhouse integrated die casting according to claim 1, characterized in that: The clamping device is a manual clamp, one end of which is rotatably arranged on a frame (n1), and the other end is pressed and fitted on one side of the workpiece until the other side of the workpiece is in contact with the positioning surface.

8. The comprehensive inspection fixture for longitudinal beam and wheelhouse integrated die casting according to claim 7, characterized in that: The manual clamp includes an L-shaped connecting elbow (n220), which is hinged to the frame (n1). One end of the connecting elbow (n220) is connected to the handle pressure handle (n221), and the other end is connected to the clamping block (n222). The connecting elbow (n220) rotates around the hinge point until the clamping block (n222) is pressed and matched with the workpiece.

9. The comprehensive inspection fixture for longitudinal beam and wheelhouse integrated die casting according to claim 1, characterized in that: The detection device includes a contour detection device and a flushness card matching detection device, which are used to detect the outer contour of the workpiece; The contour detection device includes a reference plate, and the reference plate cooperates with a matching contour detection go / no-go gauge to perform a detection operation.

10. The comprehensive inspection fixture for longitudinal beam and wheelhouse integrated die casting according to claim 1, characterized in that: The detection device also includes a diameter go / no-go gauge and a position reference pin for detecting the deviation of the workpiece hole; the position reference pin performs a reference bottom hole detection operation.

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