Adjustable cushion block auxiliary tool for pre-adjustment of large parts

Abstract

An adjustable pad block auxiliary tool for pre-machining adjustment of large parts, comprising a base, a screw rod, an adjusting ring, a limiting ring, a supporting head and at least two supporting rods. The lower end of the screw rod is rotatably supported on the base, and the outer periphery is provided with external threads and an axial scale; the adjusting ring is sleeved on the screw rod through internal threads to form a screw pair; the limiting ring is fixed on the screw rod and located above the adjusting ring; the lower end of the supporting rod is hinged to the adjusting ring, and the upper end is hinged to the supporting head. When the screw rod is rotated, the adjusting ring moves along the screw rod, and the height of the supporting head is changed by the swing of the supporting rod to realize stepless adjustment. The invention realizes quantitative and accurate adjustment through the scale, avoids the precision loss of traditional fina pieces due to pressure deformation, is easy and safe to operate, significantly improves efficiency, and the surface oxidation-resistant paint layer can effectively resist oil corrosion and has a long service life.

Description

Technical Field

[0001] This invention relates to the field of auxiliary tooling technology for machining, specifically to an adjustable pad auxiliary tooling for pre-machining adjustment of large parts, which is particularly suitable for multi-station machining and adjustment of large-size and heavy parts such as low-speed diesel engines. Background Technology

[0002] In machining production sites, especially in low-speed diesel engine manufacturing workshops, the parts to be processed are usually large in size and heavy in weight, and often involve processing at multiple workstations. Before the parts are officially processed, operators need to precisely calibrate them to ensure the accuracy of the processing datum.

[0003] Currently, the traditional calibration method mainly relies on jacks to lift the parts, and then gradually adjusts the height and level of the parts by inserting different sized flanking plates onto shims. This method has many problems: First, operators need to repeatedly get on and off the machine tool for adjustment, which is tedious, labor-intensive, and inefficient; second, the flanking plates are prone to deformation under the enormous pressure of large diesel engine parts, causing changes in their thickness accuracy and directly affecting the machining precision of the parts; in addition, the frequent use of jacks and shims for calibration work poses certain dangers and risks to the personal safety of operators.

[0004] Therefore, there is an urgent need for auxiliary tooling that can simplify the calibration process, improve calibration accuracy, and ensure operational safety to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing large parts calibration methods and provide an adjustable pad auxiliary tooling to solve the problems of easy loss of accuracy, cumbersome operation, high labor intensity and high safety risks in the traditional Phenom pad calibration.

[0006] The technical solution of the present invention is as follows: An adjustable pad auxiliary tooling for pre-processing calibration of large parts is characterized by comprising a base, a screw, an adjusting ring, a limiting ring, a support head, and at least two support rods. The base rests on a support platform, providing stable support. The lower end of the screw is mounted at the center of the base via a rotating connection structure (such as a bearing) with axial limiting function, ensuring that the screw can only rotate while its axial position remains unchanged; the screw has an external thread on its outer circumference and is marked with graduations along the axial direction for quantitative indication of the adjustment amount.

[0007] The adjusting ring is threaded onto the screw, forming a helical pair. When the operator rotates the screw, the adjusting ring can move precisely up and down along the screw's axial direction. The limiting ring is fixed to the upper end of the screw (e.g., via a threaded connection or pin), located above the adjusting ring, to limit the maximum safe upward travel of the adjusting ring and prevent the mechanism from exceeding its limit position.

[0008] The support head is used to directly support the bottom surface of the part to be adjusted. Its upper surface may be provided with a bonding layer or a soft protective pad that fits the bottom surface of the part. The lower end of each support rod is hinged to the adjusting ring, and the upper end is hinged to the lower part of the support head, thus forming a variable linkage mechanism. When the control screw is turned in or out via the scale, the adjusting ring moves up and down along the screw, driving the swing angle of the support rod to change. By using the opening or closing action of the support rod, the support head is smoothly raised and lowered in the vertical direction, thereby achieving stepless and precise adjustment of the overall height of the tooling.

[0009] Furthermore, the support rods are preferably three or more, and evenly distributed in the circumferential direction to form a stable support structure for the load above the support head. In addition, the surfaces of the base, screw, adjusting ring, limiting ring, support rods, and support head can all be coated with an anti-oxidation paint layer to resist the corrosion of metal parts by oil stains at the processing site and extend their service life.

[0010] Compared with the prior art, the beneficial effects of the present invention are: 1) Visual quantitative height adjustment via screw scale completely eliminates the drawback of traditional Phenom plate's precision decay due to pressure deformation, ensuring high-precision calibration effect over a long period and meeting the precision consistency requirements of multi-station processing.

[0011] 2) Reduces operator discomfort and prevents occupational diseases. It has a long service life. Oil stains produced in industrial production are corrosive, but this calibration auxiliary tooling is coated with an anti-oxidation paint, effectively resisting oil corrosion in the production environment.

[0012] 3) It ensures the personal safety of operators. In traditional calibration operations, operators need to first use a jack to lift the part, and then insert different specifications of flyer plates on the pad to achieve calibration, which is dangerous. With this invention, operators only need to adjust the screw to achieve different precision calibrations, reducing dangerous operations and protecting the safety of operators. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the adjustable pad auxiliary tooling used for pre-processing calibration of large parts according to the present invention. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the scope of protection of the present invention.

[0015] Please see Figure 1 As shown in the figure, an adjustable pad auxiliary tooling for pre-processing calibration of large parts includes a base 1, a screw 2, an adjusting ring 3, a limiting ring 4, support rods, and a support head 5. Multiple support rods can be provided to form a linkage mechanism.

[0016] Specifically, the base is a disc-shaped or frame structure with a stable support surface, used to place the entire fixture smoothly on a flat and stable platform below the low-speed diesel engine parts, such as a machine tool table or a special leveling pad. The screw is vertically and rotatably positioned at the center of the base, its surface machined with precision external threads, and a scale clearly marked along the axial direction of the screw to indicate the height adjustment. This scale design allows the operator to intuitively and quantitatively control the adjustment amount.

[0017] The adjusting ring is fitted onto the screw rod through its central threaded hole, forming a helical connection. When the operator rotates the screw rod, the adjusting ring will move axially upward or downward relative to the screw rod under the drive of the thread. The limiting ring is fitted onto the screw rod and fixedly installed at an appropriate position above the adjusting ring. Its main function is to set the maximum safe stroke of the adjusting ring's upward movement, preventing the adjusting ring from dislodging or the support rod from exceeding its dead point, thus providing a limiting and protective function.

[0018] The support head is a component that directly contacts the bottom surface of the part to be adjusted. Its upper surface is flat, curved, or has a soft padding layer to adapt to the contact requirements of different parts and protect the machined surface of the part.

[0019] The support head, base, and adjusting ring are connected by multiple support rods, forming a variable geometry linkage support structure. Specifically, each support rod has a hinged (or similar rotatable) connection at both ends to the support head, adjusting ring, or base, allowing the tilt angle of the support rod to change freely with the displacement of the adjusting ring. When the adjusting ring moves up and down along the screw, it drives the connected support rod to change its angle with the screw axis. This, in turn, through the opening or closing action of the support rod, smoothly lifts or lowers the support head, ultimately achieving stepless, continuous adjustment of the overall working height of the tooling.

[0020] Before proceeding with the calibration, adjust the height of the calibration auxiliary fixture to its lowest position using the screw. Place the auxiliary fixture base on a flat and stable platform below the low-speed diesel engine parts. Use the support head to hold the diesel engine parts in place, and adjust the required height using the scale on the screw. Turning the screw in and out changes the angle between the support rods of the calibration fixture, thereby adjusting the fixture height and completing the calibration of the low-speed diesel engine parts before processing.

[0021] It should be noted that the above is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Any modifications, equivalent substitutions, and improvements made within the scope of the inventive concept should be included within the protection scope of the present invention.

Claims

1. An adjustable pad auxiliary tool for pre-processing calibration of large parts, characterized in that... ,include: Base; A screw, the lower end of which is rotatably supported on the base, and the screw is fixed relative to the base in the axial direction. The outer circumferential surface of the screw is provided with an external thread and a scale along the axial direction. An adjusting ring is threaded onto the screw rod, forming a helical pair with the screw rod. A limiting ring is fixedly sleeved on the screw and located above the adjusting ring; Support head, used to prop up parts to be adjusted; At least two support rods, the lower end of each support rod is hinged to the adjusting ring, and the upper end is hinged to the lower part of the support head, such that when the adjusting ring moves along the screw axis, the height of the support head relative to the base is changed by the swinging of the support rod.

2. The adjustable pad auxiliary tool for pre-processing calibration of large parts according to claim 1, characterized in that... The limiting ring is fixed to the upper end of the screw by a threaded connection or a pin to limit the maximum upward stroke of the adjusting ring.

3. The adjustable pad auxiliary tool for pre-processing calibration of large parts according to claim 1, characterized in that... The support rods consist of three or more rods, which are evenly distributed in the circumferential direction to form a stable support for the support head.

4. The adjustable pad auxiliary tool for pre-processing calibration of large parts according to claim 1, characterized in that... The upper surface of the support head is provided with a protective pad layer, which is a soft material layer or an adhesive layer that matches the shape of the bottom surface of the part to be adjusted.

5. The adjustable pad auxiliary tool for pre-processing calibration of large parts according to claim 1, characterized in that... The surfaces of the base, screw, adjusting ring, limiting ring, support rod, and support head are all covered with an anti-oxidation paint layer to resist corrosion from industrial oil stains.

6. The adjustable pad auxiliary tool for pre-processing calibration of large parts according to claim 1, characterized in that... The lower end of the screw is mounted at the center of the base via a bearing or a rotating connection structure with axial limiting function to ensure that the screw only rotates.

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