A special inspection tool for measuring the die misalignment of triangular fork forgings

Abstract

The present invention discloses a special inspection tool for measuring the misalignment of triangular fork forgings, which relates to the field of transmission shaft component inspection. The tool comprises a base plate, etc., wherein a V-shaped mounting block, a linear guide rail and a pad are fixedly mounted on the base plate. The linear guide rail contacts the edge of one side of the pad. The V-shaped mounting block is arranged on the other side of the pad. The triangular fork to be inspected is placed on the pad. A fixed V-shaped block is embedded on the V-shaped mounting block, with its opening facing the pad. The lower part of the V-shaped mounting block is slotted for inserting a sliding block. The bottom of the sliding block has a bearing so that it can move freely back and forth and left and right in the slot. A movable V-shaped block is fixed on the top of the sliding block, with its opening also facing the pad, for the top angle lower die of the triangular fork to extend into and contact and position. A dial indicator is fixed on the V-shaped mounting block to detect the offset of the upper and lower dies of the triangular fork. The measurement value of the present invention is accurate and reliable. During inspection, there is no need to hold the workpiece for measurement, which reduces labor intensity, improves the safety factor, and allows the accuracy of the inspection tool to be calibrated at any time.

Description

Technical Field

[0001] The invention relates to the field of transmission shaft component detection, and in particular to a special inspection tool for measuring die misalignment of a triangular fork forging. Background Art

[0002] In the prior art, vernier calipers are typically used to measure the diagonal lengths of the upper and lower dies at the corners of a triangular fork to measure left-right and rotational misalignment. Because both the upper and lower dies have draft angles and contour radiuses, the results vary widely depending on the measurement point. For front-to-back misalignment, the misalignment can only be determined by the height of the cut edge relative to the upper and lower dies, failing to provide true data on the misalignment of the upper and lower dies. Existing detection methods have the following drawbacks:

[0003] 1. Since both the upper and lower molds have draft angles and contour radius, it is difficult to find the accurate measurement point, resulting in large human errors;

[0004] 2. The front and rear dislocation modes can only be measured visually or with a caliper depth gauge using the cut edge as a reference, and the results are unreliable;

[0005] 3. Employees measure workpieces by hand, which is labor-intensive and unsafe. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a special inspection tool for measuring the mold misalignment of triangular fork forgings, which has the advantages of easy use, high detection accuracy, and time and labor saving.

[0007] The purpose of the present invention is achieved through the following technical solutions: This special inspection tool for measuring the misalignment of triangular fork forgings comprises a base plate and a triangular fork, wherein a V-shaped mounting block, a linear guide rail and a pad are fixedly mounted on the base plate, and the linear guide rail is in contact with and perpendicular to one edge of the pad, the V-shaped mounting block is arranged on the other side of the pad, and the triangular fork to be inspected is placed on the pad; a fixed V-shaped block is embedded on one side of the V-shaped mounting block close to the pad, and the V-shaped opening of the fixed V-shaped block faces the pad, for the top corner upper die of the triangular fork to extend into and contact and position; a slot is opened at the lower part of the V-shaped mounting block for The sliding block is inserted, and the bottom of the sliding block is provided with a bearing so that it can move freely back and forth and left and right in the groove. A movable V-shaped block is fixed on the top of the sliding block, and the V-shaped opening of the movable V-shaped block also faces the pad, so that the top angle lower mold of the triangular fork can be extended and contacted for positioning; a dial indicator is fixed on each side of the V-shaped mounting block, and each dial indicator passes through the V-shaped mounting block and presses on the sliding block to detect the offset of the upper and lower molds of the triangular fork; a sliding block is slidably connected to the linear guide rail, and an alignment block is movably connected to the sliding block through a constant force spring, and the alignment block contacts and presses tightly with the bottom feet on both sides of the triangular fork.

[0008] As a further technical solution, the V-shaped mounting block is connected and fixed to the base plate via an M5 screw.

[0009] As a further technical solution, the fixed V-block is fixed to the V-shaped mounting block via an M4 screw.

[0010] As a further technical solution, the dial indicator is fixed to the V-shaped mounting block via a tightening screw.

[0011] As a further technical solution, the alignment block is connected and fixed to the slider via an M5 screw.

[0012] As a further technical solution, the linear guide rail is connected and fixed to the base plate via an M4 screw.

[0013] As a further technical solution, the pad is connected and fixed to the base plate via an M6 screw.

[0014] The beneficial effects of the present invention are: the measured value is accurate and reliable, there is no need to hold the workpiece for measurement during detection, the labor intensity is reduced, the safety factor is improved, and the accuracy of the inspection tool can be calibrated at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a top view of the structure of the present invention.

[0017] Figure 3 It is a structural cross-sectional view of the present invention.

[0018] Explanation of the accompanying symbols: base plate 1, V-shaped mounting block 2, movable V-shaped block 3, fixed V-shaped block 4, bearing 5, sliding block 6, dial indicator 7, triangular fork 8, alignment block 9, slider 10, linear guide 11, spacer 12, tightening screw 13, M5 screw 14, M6 screw 15, M4 screw 16. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings:

[0020] Example: As shown in the attached Figures 1 to 3As shown, this special inspection tool for measuring the misalignment of triangular fork forgings includes a base plate 1 and a triangular fork 8, the base plate 1 is fixed with a V-shaped mounting block 2, a linear guide 11 and a pad 12, the pad 12 is connected and fixed to the base plate 1 by an M6 screw 15, the linear guide 11 is connected and fixed to the base plate 1 by an M4 screw 16, and is in contact with and perpendicular to one side edge of the pad 12, the V-shaped mounting block 2 is arranged on the other side of the pad 12 and is connected and fixed to the base plate 1 by an M5 screw 14, and the triangular fork 8 to be inspected is placed on the pad 12; a fixed V-shaped block 4 (fixed to the V-shaped mounting block 2 by an M4 screw 16) is embedded on one side of the V-shaped mounting block 2 close to the pad 12, and the V-shaped opening of the fixed V-shaped block 4 faces the pad 12, for the top corner upper die of the triangular fork 8 to extend into and contact and position; The lower groove of 2 is used to insert the sliding block 6. The bottom of the sliding block 6 is provided with a bearing 5 so that it can move freely back and forth and left and right in the groove. A movable V-shaped block 3 is fixed on the top of the sliding block 6. The V-shaped opening of the movable V-shaped block 3 also faces the pad 12, for the top angle lower mold of the triangular fork 8 to extend into and contact and position; a dial indicator 7 is fixed on the two sides of the V-shaped mounting block 2, each dial indicator 7 passes through the V-shaped mounting block 2 and presses on the sliding block 6 to detect the upper and lower mold offset of the triangular fork 8, and the dial indicator 7 is fixed to the V-shaped mounting block 2 by a tightening screw 13; a slider 10 is slidably connected to the linear guide rail 11, and an alignment block 9 is movably connected to the slider 10 through a constant force spring. The alignment block 9 contacts and presses on the two side feet of the triangular fork 8, and the tail of the alignment block 9 is connected and fixed to the slider 10 by an M5 screw 14.

[0021] The working process of the present invention is as follows: During testing, the standard part is first placed on the pad 12. The alignment block 9 is moved to align the upper die at the bottom two corners of the standard part. At this time, the semicircle of the top corner of the standard part contacts the fixed V-block 4 and the movable V-block 3. The dial indicator 7 is set to zero, and then the alignment block 9 is returned and the standard part is removed. The triangular fork 8 to be tested is then placed on the pad 12. The alignment block 9 is used to push the triangular fork 8 until the top corner upper die is in good contact with the fixed V-block 4. At this time, due to the offset of the upper and lower dies of the triangular fork 8 on the movable V-block 3, different values ​​will be displayed on the dial indicator 7. This value is the actual misalignment of the upper and lower dies of the triangular fork 8. Since the comparison measurement is performed using a standard part, the three corners of the triangular fork 8 to be tested must be measured separately.

[0022] The present invention secures the upper die of the triangular fork forging using a fixed V-block and a constant-force alignment block 9. Because the movable V-block is flexible and possesses a certain degree of elasticity, it accurately locates the measuring point of the lower die. Furthermore, the forging's trimmings are cleared between the fixed and movable V-blocks, ensuring reliable measurement results. Furthermore, the triangular fork forging is placed on a pad for measurement, ensuring safety, reliability, and effortlessness. Because comparative measurement is employed, the accuracy of the gauge can be calibrated at any time.

[0023] It is understandable that for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A special inspection tool for measuring the misalignment of triangular fork forgings, characterized by: The invention comprises a base plate (1) and a triangular fork (8), wherein a V-shaped mounting block (2), a linear guide rail (11) and a pad (12) are fixedly mounted on the base plate (1), and the linear guide rail (11) is in contact with and perpendicular to one side edge of the pad (12), the V-shaped mounting block (2) is arranged on the other side of the pad (12), and the triangular fork (8) to be detected is placed on the pad (12); a fixed V-shaped block (4) is embedded and mounted on one side of the V-shaped mounting block (2) close to the pad (12), and the V-shaped opening of the fixed V-shaped block (4) faces the pad (12) so that the top corner upper die of the triangular fork (8) can be inserted and contacted for positioning; a groove is formed at the bottom of the V-shaped mounting block (2) for inserting a sliding block (6), and the bottom of the sliding block (6) is provided with a groove. The bearing (5) enables it to move freely in the groove forward and backward and left and right. A movable V-shaped block (3) is fixed on the top of the sliding block (6). The V-shaped opening of the movable V-shaped block (3) also faces the pad (12) for the top corner lower die of the triangular fork (8) to extend into and contact and position. A dial indicator (7) is fixed on each side of the V-shaped mounting block (2). Each dial indicator (7) passes through the V-shaped mounting block (2) and is pressed against the sliding block (6) to detect the offset of the upper and lower dies of the triangular fork (8). A slider (10) is slidably connected to the linear guide rail (11). A aligning block (9) is movably connected to the slider (10) through a constant force spring. The aligning block (9) contacts and presses against the two side feet of the triangular fork (8). During the test, first place the standard part on the pad (12), and move the alignment block (9) to the upper die at the bottom two corners of the standard part for alignment. At this time, the semicircle of the top corner of the standard part contacts the fixed V-block (4) and the movable V-block (3). Set the dial indicator (7) to zero respectively, then return the alignment block (9) and take out the standard part; then place the triangular fork (8) to be tested on the pad (12), and use the alignment block (9) to push the triangular fork (8) to the top corner upper die and contact the fixed V-block (4). At this time, the movable V-block (3) is affected by the offset of the upper and lower dies of the triangular fork (8), and different values ​​will be displayed on the dial indicator (7). This value is the true misalignment of the upper and lower dies of the triangular fork (8); The dial indicator (7) is fixed to the V-shaped mounting block (2) via a tightening screw (13); The alignment block (9) is connected and fixed to the slider (10) via an M5 screw (14).

2. The special inspection tool for measuring the misalignment of triangular fork forgings according to claim 1, characterized in that: The V-shaped mounting block (2) is connected and fixed to the base plate (1) via an M5 screw (14).

3. The special inspection tool for measuring the misalignment of triangular fork forgings according to claim 1, characterized in that: The fixed V-shaped block (4) is fixed to the V-shaped mounting block (2) via an M4 screw (16).

4. The special inspection tool for measuring the misalignment of triangular fork forgings according to claim 1, characterized in that: The linear guide rail (11) is connected and fixed to the base plate (1) via an M4 screw (16).

5. The special inspection tool for measuring the misalignment of triangular fork forgings according to claim 1, characterized in that: The cushion block (12) is connected and fixed to the base plate (1) via an M6 screw (15).

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