Tray position degree testing fixture

Abstract

The invention discloses a tray position degree gauge, which comprises a bottom plate, a stand column, a supporting block, a positioning block, a detection plate, a go gauge and a no-go gauge, and is characterized in that the stand column, the supporting block and the positioning block are respectively fixed on the bottom plate, the detection plate is provided with a first mounting hole used for being in sliding fit with the stand column, and the detection plate is also provided with a second mounting hole used for being matched with the positioning column; the go gauge and the no-go gauge cooperate with the stand column and the detection plate. The device is mainly used for detecting the position degree of a columnar part with positioning or precision requirements on the tray.

Description

Technical Field

[0001] The invention relates to a pallet position measuring tool on an automobile assembly line. Background Art

[0002] See also Figure 1 (include Figure 1 a to Figure 1 d) shows a pallet commonly used in assembly production lines with positioning, supporting and transporting functions. There are four positioning pin holes 2 on the bottom of the pallet for positioning and supporting the pallet in the online equipment. There are four columnar components on the top of the pallet body 1, two of which are support columns 3 for supporting, and the other two are positioning columns 4 for supporting and positioning. The upper end of the positioning column 4 is provided with a positioning pin 4a for positioning the product.

[0003] The positioning pin hole 2 at the bottom of the pallet body 1 needs to be precisely positioned to facilitate its circulation and positioning in different workstations and online equipment on the production line, so it has high positioning requirements. The support column 3 and positioning column 4 on the top of the pallet body 1 cooperate with the positioning pin holes on the transported product parts to support and fix the product parts; the pallet body 1 is the medium for positioning the product parts and the equipment on the production line, and the support column 3 and positioning column 4 should also have high precision requirements.

[0004] Figure 1 a to Figure 1 d illustrates the accuracy and position requirements of the positioning pin hole 2 at the bottom of the pallet body 1, as well as the accuracy and position requirements of the support column 3 and the positioning column 4 on the pallet body 1. The bottom positioning pin and the column are both positioned based on the center of the pallet, and a relative position relationship is established between the two.

[0005] In combination with production needs, the pallet will transport a large number of product parts in daily use, so there is a possibility of wear and position displacement. The pallet needs to be regularly checked for its position dimensions. The dimensions that need to be checked are: the position of the bottom positioning pin hole 2 and the support column 3 and the positioning column 4. Among them, the dimensions of the 4 positioning pin holes 2 are The dimension L1 of the positioning pin hole 2 in the length direction is 200±0.03, and the dimension W1 of the positioning pin hole 2 in the width direction is 120±0.03. The diameter of the upper part of the support column 3 and the positioning column 4 for The height H of the support column 3 and the positioning column 4 is 240±0.1, the length dimension L2 of the first support column 3, the second support column 3 and the first positioning column 4 is 200±0.05, the width dimension W2 of the first support column 3 is 75±0.05, the width dimension W3 of the second support column 3 and the first positioning column 4 is 65±0.05, the length dimension L3 of the second positioning column 4 is 120±0.05, and the width dimension W4 of the second positioning column 4 is 80±0.05. Because of the spatial dimensions involved, a three-coordinate measuring machine is generally used to establish a coordinate axis based on the bottom plate positioning pin hole to detect whether the position dimension of the positioning column 4 is qualified; because there are many pallets and types on the production line, the three coordinates cannot be inspected at the same time, and it takes a lot of time to transport the pallets to the three-coordinate measuring machine, resulting in low inspection efficiency and high inspection costs. Summary of the invention

[0006] The purpose of the present invention is to provide a pallet position detection device to address the corresponding deficiencies of the prior art. The present invention is mainly used for detecting the position of columnar components with positioning or precision requirements on pallets.

[0007] The technical solutions to the above problems are as follows:

[0008] A pallet position gauge comprises a base plate, a column, a support block, a positioning block, a detection plate, a go gauge and a stop gauge, wherein the column, the support block and the positioning block are respectively fixed on the base plate, the detection plate is provided with a first mounting hole for slidingly cooperating with the column, the detection plate is also provided with a second mounting hole for cooperating with the positioning column, and the go gauge and the stop gauge cooperate with the column and the detection plate.

[0009] Furthermore, the column includes a first column and a second column that cooperates with the first mounting hole, one end of the first column is fixed to the base plate, the other end of the first column is fixed to one end of the second column, the diameter of the second column is smaller than the diameter of the first column, and a step is formed between the second column and the first column.

[0010] Furthermore, the base plate is provided with an assembly hole, and the support block and the positioning block are respectively matched with the assembly holes and fastened to the base plate by screws. The distance between the upper end surface of the support block and the upper end surface of the base plate is equal to the distance between the upper end surface of the positioning block and the upper end surface of the base plate.

[0011] Furthermore, the detection board includes a main body and a support ear, a support ear is fixed to each of the two ends of the main body, the first mounting hole is arranged on the support ear, and the second mounting hole is arranged on the main body.

[0012] The inspection fixture of the present invention uses a support block and a positioning block to position the pallet to be inspected, and at the same time, the relative positions of the positioning block holes on the column and the bottom plate are fixed, and then the position requirements are transmitted through the first mounting hole on the detection plate and the column, and the second mounting hole on the detection plate and the positioning pin on the positioning column in the pallet are matched, and then the through gauge and the stop gauge are matched with the bottom surface of the three-dimensional and detection plate to detect whether the size of each part on the pallet meets the requirements. The general pallet position size requirement is ±0.05, and the inspection fixture processing tolerance can be controlled at ±0.003. After the positioning block and the bottom plate, the bottom plate and the column, and the column and the detection plate are transferred, the cumulative tolerance can be ±0.01, which meets the processing requirements and the tolerance requirements of the inspection fixture itself.

[0013] The general pallet positioning height requirement is ±0.1. The pallet support surface and the bottom plate height composed of the support block and the positioning block on the inspection fixture can be controlled within the processing tolerance of ±0.003 by grinding. The column processing tolerance can be controlled within ±0.005. The processing tolerance of the go gauge and the stop gauge can be controlled within ±0.003. After the cumulative tolerance of the support block, positioning block and column height, the cumulative tolerance of the inspection fixture height can be within ±0.01, which meets the processing and the inspection fixture's own tolerance requirements.

[0014] In summary, the pallet position gauge can detect whether the dimensions are out of tolerance by converting the pallet positioning reference surface and the support positioning surface reference, thereby converting the required positioning length, width and height space dimensions of the pallet.

[0015] The beneficial effects of the present invention are: under existing processing conditions, a position gauge is manufactured at a lower manufacturing cost, replacing a three-coordinate measuring machine to detect the position of a pallet, eliminating the need for three-coordinate measuring machine programming and detection waiting time, shortening the pallet detection cycle and detection cost; the gauge can also be used in other locations where position measurement and dimensional position detection are required, and is simple to operate, convenient and quick to use, and solves the problem caused by insufficient measurement capability of the measuring machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of the pallet, where: Figure 1 a is a three-dimensional image of a tray. Figure 1 b is the bottom view of the tray. Figure 1 c is the main view of the tray, Figure 1 d is a top view of the tray.

[0017] Figure 2 It is a three-dimensional diagram of the pallet position inspection tool of the present invention.

[0018] Figure 3 A top view of the test board.

[0019] Figure 4 It is a schematic diagram of the tray after being matched with the bottom plate, support block and positioning block in the present invention.

[0020] Figure 5 For Figure 4 Schematic diagram of matching the inspection plate, go gauge and no-go gauge with the column based on the above.

[0021] Figure 6 This is a schematic diagram of inserting a go gauge or a stop gauge.

[0022] Markings in the accompanying drawings:

[0023] Tray body 1, positioning pin hole 2, support column 3, positioning column 4. Positioning pin 4a

[0024] Base plate 11, column 12, first column 12a, second column 12b, step 12c, support block 13, positioning block 14, detection plate 15, first mounting hole 15a, second mounting hole 15b, main body 151, support ear 152, deweighting hole 153, through gauge 16, stop gauge 17. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The examples described are only part of the embodiments of the present invention, not all of the embodiments. Based on the examples in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0026] like Figures 2 to 3 A pallet position gauge of the present invention comprises a base plate 11, a column 12, a support block 13, a positioning block 14, a detection plate 15, a go gauge 16 and a stop gauge 17. The column 12, the support block 13 and the positioning block 14 are respectively fixed on the base plate 11. There are two columns 12, and positioning holes are provided on the base plate 11. The columns 12 are matched with the positioning holes on the base plate 11 and are fastened to the base plate 11 as a whole by bolts. The columns 12 and the positioning blocks 14 are fixed in relative position to position the detection plate 15.

[0027] The column 12 includes a first column 12a and a second column 12b that cooperates with the first mounting hole 15a. One end of the first column 12a is fixed to the base plate 11, and the other end of the first column 12a is fixed to one end of the second column 12b. The diameter of the second column 12b is smaller than the diameter of the first column 12a, and a step 12c is formed between the second column 12b and the first column 12a.

[0028] In the present invention, there are two support blocks 13 and two positioning blocks 14, and the bottom plate 11 is provided with assembly holes. The support blocks 13 and the positioning blocks 14 are respectively matched with the assembly holes and fastened to the bottom plate 11 as a whole by screws. The distance between the upper end surface of the support block 13 and the upper end surface of the bottom plate 11 is equal to the distance between the upper end surface of the positioning block 14 and the upper end surface of the bottom plate 11. The support block 13 and the positioning block 14 are used to support and position the support tray body 1.

[0029] The detection plate 15 is provided with a first mounting hole 15a for slidingly cooperating with the column 12, and the detection plate 15 is also provided with a second mounting hole 15b for cooperating with the positioning column 4. The detection plate 15 includes a main body 151 and a lug 152. A lug 152 is fixed at each end of the main body 151. The first mounting hole 15a is provided on the lug 152, and the second mounting hole 15b is provided on the main body 151. A deweighting hole 153 is also provided in the middle of the detection plate 15. The deweighting hole 153 can reduce the weight of the detection plate 15, save the material of the detection plate 15, and thus reduce the cost of the detection plate 15. In addition, the operator's hand reaches into the deweighting hole 153 to take the detection plate 15, which is convenient for installing and disassembling the detection plate 15.

[0030] The go gauge 16 and the stop gauge 17 cooperate with the column 12 and the detection plate 15. The go gauge 16 and the stop gauge 17 are independent movable components and are used in conjunction with the column 12 and the detection plate 15. When the go gauge 16 and the stop gauge 17 detect the height of the pallet support surface, they cooperate with the column 12 and the detection plate 15 clearance.

[0031] The present invention is used Figure 1 The inspection process for the pallet shown is as follows:

[0032] S1, first determine that the detection plate 15 and the column 12 are in a separated state, such as Figure 4 As shown, the pallet is hoisted onto the bottom plate 11 , so that the positioning pin hole 2 at the bottom of the pallet body 1 cooperates with the positioning block 14 , and the positioning block 14 forms a positioning function for the pallet body 1 .

[0033] S2, install the detection plate 15 on the column 12, even if the first mounting hole 15 and the second column 12b are slidably matched, the detection plate 15 slides downward along the second column 12b, and observe whether the second mounting hole 15b on the detection plate 15 can match with the positioning pin 4a at the upper end of the positioning column 4. If they can match, it proves that the diameter of the positioning pin 4a on the positioning column 4 is and its location is qualified.

[0034] In S3 and S2, since the upper end of the positioning column 4 supports the detection plate 15, the detection plate 15 cannot continue to slide downward. Figure 5 and Figure 6As shown, the through gauge 16 and the stop gauge 17 are sequentially installed from position A to position B. If the through gauge 16 can be installed normally and the stop gauge 17 cannot be installed, it means that the height dimension H (240±0.1) of the support column 3 and the positioning column 4 is qualified; if the through gauge 16 cannot be installed, or both the through gauge 16 and the stop gauge 17 can be installed, it means that the height dimension H of the support column 3 and the positioning column 4 is unqualified. Although this method does not directly detect the height dimension H (240±0.1) of the support column 3 and the positioning column 4, it can indirectly detect whether the height dimension H of the support column 3 and the positioning column 4 is qualified through the size difference between the column 12 and the bottom plate 11, the support block 13 and the positioning block 14, and the size difference between the upper surface of the support column 3 and the positioning column 4 on the lower surface of the detection plate 15.

[0035] A through gauge 16 is installed on each of the two columns 12, and two feeler gauges are inserted into the gap between the through gauge 16 and the detection plate 15. By comparing the values ​​between the two feeler gauges, it can be determined whether the upper end surfaces of the two support columns 3 are located in the same plane.

Claims

1. A pallet position gauge, characterized in that: The invention comprises a bottom plate (11), a column (12), a support block (13), a positioning block (14), a detection plate (15), a go gauge (16) and a stop gauge (17); the column (12), the support block (13) and the positioning block (14) are respectively fixed on the bottom plate (11); a first mounting hole (15a) for slidingly matching with the column (12) is provided on the detection plate (15); a second mounting hole (15b) for matching with the positioning column (4) is also provided on the detection plate (15); the go gauge (16) and the stop gauge (17) match with the column (12) and the detection plate (15).

2. A pallet position measuring tool according to claim 1, characterized in that: The column (12) comprises a first column (12a) and a second column (12b) matched with the first mounting hole (15a); one end of the first column (12a) is fixed to the base plate (11); the other end of the first column (12a) is fixed to one end of the second column (12b); the diameter of the second column (12b) is smaller than the diameter of the first column (12a); and a step (12c) is formed between the second column (12b) and the first column (12a).

3. A pallet position measuring tool according to claim 1, characterized in that: The base plate (11) is provided with an assembly hole, and the support block (13) and the positioning block (14) are respectively matched with the assembly holes and are fastened to the base plate (11) by screws, and the distance between the upper end surface of the support block (13) and the upper end surface of the base plate (11) is equal to the distance between the upper end surface of the positioning block (14) and the upper end surface of the base plate (11).

4. A pallet position measuring tool according to claim 1, characterized in that: The detection plate (15) comprises a main body (151) and a support ear (152), wherein one support ear (152) is fixed at each end of the main body (151), the first mounting hole (15a) is arranged on the support ear (152), and the second mounting hole (15b) is arranged on the main body (151).

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