A boring device for a piston rod forging

Abstract

The utility model provides a kind of boring device for piston rod forge piece, including boring machine, and the worktable of boring machine and be located the lower side of boring cutter is provided with mounting disc, and the upper portion of mounting disc is provided with the fixture for being fixed to forge piece, and fixture includes the fixed plate being set on mounting disc, and the both ends of fixed plate are respectively provided with clamping plate, and the upper portion of two clamping plates is provided with compression plate, piston rod is placed between fixed plate, clamping plate and compression plate, and the axis direction of piston rod coincides with the axis direction of boring cutter's tool bar, the utility model can be realized to the side wall of piston rod by fixed plate, clamping plate and compression plate and realize safe and firm clamping fixation operation, greatly improve the safety and stability performance of boring operation, reduce vibration, improve processing quality and boring cutter's service life.

Description

Technical Field

[0001] This utility model relates to the field of boring equipment technology, specifically to a boring device for piston rod forgings. Background Technology

[0002] Piston rods are widely used in automobiles, compressors, hydraulic lifting devices, and other applications. Their working environment is complex; during reciprocating motion, they must withstand both heavy loads and impact loads. Their performance directly affects the normal operation of the equipment and the safety of the workers. Therefore, improving the piston rod's machining process to maximize its mechanical properties and lifespan is of paramount importance. Because forging can improve the mechanical properties of metals, offers high productivity, and saves materials, piston rod forgings hold an important position in the machining industry.

[0003] However, existing piston rod forging boring devices have several drawbacks in practical use. Traditional clamps often use planar clamping or simple arc block contact, resulting in a small contact area with the piston rod sidewall. The vibration generated by high-speed rotation during boring can easily cause the piston rod to deviate, which not only causes the roundness error of the hole to exceed the tolerance, but also accelerates the wear of the boring tool and greatly shortens the service life of the boring tool. Utility Model Content

[0004] In view of this, the present invention provides a boring device for piston rod forgings. It can achieve a firm and stable clamping and fixing of the piston rod through the combined action of the fixing plate, clamping plate and pressure plate in the fixture. It solves the problem that traditional fixtures mostly use planar clamping or simple arc block contact, which have a small contact area with the side wall of the piston rod. The vibration generated by high-speed rotation during boring can easily cause the piston rod to deviate. This not only causes the roundness error of the hole to exceed the tolerance, but also aggravates the wear of the boring tool and greatly shortens the service life of the boring tool.

[0005] To solve the above-mentioned technical problems, this utility model provides a boring device for piston rod forgings, including a boring machine, a mounting plate disposed on the worktable of the boring machine and directly below the boring tool, a fixture for fixing the forging disposed on the upper part of the mounting plate, the fixture including a fixing plate disposed on the mounting plate, clamping plates disposed at both ends of the fixing plate, and a pressure plate disposed on the upper part of the two clamping plates, the piston rod being placed between the fixing plate, the clamping plate and the pressure plate, the axial direction of the piston rod coinciding with the axial direction of the boring tool holder, this utility model can achieve safe and firm clamping and fixing of the side wall of the piston rod through the fixing plate, the clamping plate and the pressure plate, greatly improving the safety and stability of the boring operation, reducing vibration, improving the processing quality and the service life of the boring tool.

[0006] The inner sides of the two clamping plates are respectively provided with clamps that are adapted to the outer side walls of the piston rod. One of the clamping plates has a threaded hole on its side wall, and a locking bolt is threaded into the threaded hole. Tightening the locking bolt can increase the clamping force of the two clamps. This utility model can adjust the clamping force on the piston rod by using the clamps in conjunction with the locking bolt, which greatly improves the stability of the clamping operation and makes the operation more convenient.

[0007] The clamping plate has an adjustment groove, and the upper part of the clamping plate has multiple adjustment holes. A fixing pin is inserted into the adjustment hole. This utility model can achieve clamping and fixing of the piston rod at different heights by adjusting the position of the clamping plate, so as to adapt to the efficient clamping and fixing of piston rods of different lengths and the stable boring operation, making the operation more convenient and efficient.

[0008] The upper part of the mounting plate is also equipped with a support plate, and the support plate is equipped with a shock-absorbing sleeve. The bottom of the piston rod abuts against the shock-absorbing sleeve. This utility model can achieve a firm support and fixation of the bottom of the piston rod through the shock-absorbing sleeve, which greatly improves the stability of the support plate support operation.

[0009] The clamping plate is also provided with clamping screw holes, and clamping bolts are connected to the internal threads of the clamping screw holes.

[0010] The jacket is made of rubber to prevent damage to the piston rod.

[0011] The shock-absorbing sleeve has multiple anti-slip protrusions inside, which can increase the stability of clamping operations and help to buffer vibrations.

[0012] The anti-slip protrusions are made of rubber spherical structure.

[0013] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. Solve the problems of unstable clamping and large vibration: This utility model can greatly reduce the vibration amplitude of boring by using the arc-shaped fit between the clamp and the piston rod, combined with the adjustable locking bolt and the buffering effect of the anti-vibration sleeve, which greatly reduces the roundness error of the hole, greatly extends the service life of the boring tool, and significantly improves the machining accuracy.

[0014] 2. Solve the problem of uncontrollable clamping force and workpiece damage: This utility model can form a "triple anti-damage structure" through the clamping sleeve, the rubber pad at the end of the locking bolt, and the copper pressure block of the clamping bolt, avoiding direct metal contact, greatly reducing the surface roughness of the piston rod, eliminating the need for rework and grinding, and reducing production costs.

[0015] 3. Solving the problems of poor adaptability and low versatility: The clamping plate in this utility model can be adapted to piston rods of various lengths by cooperating with the adjustment groove and multiple sets of adjustment holes. The support plate can achieve fine height adjustment by shims. There is no need to change the fixture, which greatly improves the versatility, greatly shortens the single changeover time, and greatly improves the production efficiency.

[0016] 4. Solve the problems of lack of bottom support and poor coaxiality: This utility model can provide elastic support for the bottom of the piston rod through the support plate and the shockproof sleeve, preventing it from sagging under its own weight, meeting the requirements of high-precision assembly, and greatly improving the product qualification rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the boring device for piston rod forgings according to this utility model; Figure 2 This is a top view of the boring device for piston rod forgings according to this utility model; Figure 3 This is a side view of the boring device for piston rod forgings according to this utility model.

[0018] Explanation of reference numerals in the attached drawings: 100, mounting plate; 200, clamp; 210, fixing plate; 220, clamping plate; 230, pressure plate; 240, sleeve; 250, locking bolt; 300, fixing pin; 400, support plate; 500, shockproof sleeve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices of the embodiments of this utility model. Figure 1-3 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0020] like Figure 1-3As shown: This embodiment provides a boring device for piston rod forgings, including a boring machine. The boring machine is a TK6513 CNC boring machine manufactured by Shenyang Machine Tool Co., Ltd., with a table load capacity of ≥500kg. It is equipped with an S7-200 SMART PLC controller manufactured by Siemens (China) Co., Ltd., which can accurately control the spindle speed and feed rate to meet the high-precision boring requirements of piston rod forgings. A mounting plate 100 is set on the worktable of the boring machine and directly below the boring tool. The mounting plate 100 is made of 45# steel and has undergone heat treatment. It is positioned with the boring machine worktable by two locating pins and then fixed with four high-strength bolts (material 40Cr, galvanized for rust prevention). The locating pins and bolts are evenly distributed in a ring to ensure that the coaxiality error between the mounting plate 100 and the worktable is ≤0.02mm. To prevent misalignment during processing, a fixture 200 for fixing the forging is provided on the upper part of the mounting plate 100. The fixture 200 includes a fixing plate 210 mounted on the mounting plate 100. The fixing plate 210 is made of Q235 steel plate, and its size is adapted to the mounting plate 100. It is fixed to the mounting plate 100 by four bolts (material 304 stainless steel) to ensure the fit between the fixing plate 210 and the mounting plate 100. Clamping plates 220 are respectively provided at both ends of the fixing plate 210. There are two clamping plates 220, made of the same Q235 steel as the fixing plate 210, which are vertically welded to both ends of the fixing plate 210 using carbon dioxide gas shielded welding. Stress relief treatment is performed after welding to prevent deformation. A sleeve 240 is bonded to the inner side of the clamping plate 220 with epoxy resin. The sleeve 240 is made of nitrile rubber, and its inner wall is machined into an arc shape to fit the outer wall of the piston rod, increasing the contact area and improving clamping stability while preventing direct metal-to-metal contact that could damage the piston rod. The two clamping plates 2... A clamping plate 230 is provided on the upper part of the 20. The piston rod is placed between the fixing plate 210, the clamping plate 220 and the clamping plate 230. The axial direction of the piston rod coincides with the axial direction of the boring bar. This utility model can achieve safe and firm clamping and fixing of the side wall of the piston rod through the fixing plate 210, the clamping plate 220 and the clamping plate 230, which greatly improves the safety and stability of boring operation, reduces vibration, improves processing quality and service life of boring bar.

[0021] According to one embodiment of the present invention, such as Figure 1-3As shown, the inner sides of the two clamping plates 220 are respectively provided with sleeves 240 that are adapted to the outer side walls of the piston rod. The sleeves 240 are rubber sleeves, which can prevent damage to the piston rod. A threaded hole is opened on the side wall of one of the clamping plates 220, and a locking bolt 250 is threaded into the threaded hole. The bolt is made of 45 steel and has been quenched. The bolt is threaded into the threaded hole on the side wall of one of the clamping plates 220. A nitrile rubber gasket is fitted on the end of the bolt. When the bolt is tightened, the end presses against the sleeve 240 of the other clamping plate 220. The clamping force can be changed by adjusting the screwing depth of the bolt to adapt to piston rods of different diameters or surface hardness. Tightening the locking bolt 250 can increase the clamping force of the two sleeves 240. This utility model can adjust the clamping force on the piston rod by using the sleeves 240 and the locking bolt 250, which greatly improves the stability of the clamping operation and makes the operation more convenient.

[0022] According to another embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the clamping plate 230 is also provided with clamping screw holes, and clamping bolts are threaded into the clamping screw holes. The clamping plate 230 is provided with adjustment grooves. The upper part of the clamping plate 220 is provided with multiple adjustment holes, and fixing pins 300 are inserted into the adjustment holes. The clamping plate 230 is made of Q235 steel and has long strip-shaped adjustment grooves along the vertical direction. The upper part of the clamping plate 220 is provided with 5-8 sets of adjustment holes evenly distributed along the vertical direction. The adjustment holes are adapted to the adjustment grooves. The clamping plate 230 can be detachably fixed by passing the fixing pins 300 (material 45 steel) sequentially through the adjustment holes of one side of the clamping plate 220, the adjustment groove of the clamping plate 230, and the adjustment hole of the other side of the clamping plate 220. The adjustment groove allows the clamping plate 230 to move up and down by 50mm to accommodate piston rods of different lengths. The clamping plate 230 is also provided with threaded holes in the middle, and clamping bolts (material 304 steel) are connected inside. (Stainless steel), with a copper pressure block welded to the end of the bolt. The copper is soft and can prevent damage to the piston rod surface. When the bolt is tightened, the pressure block presses against the upper part of the piston rod to prevent movement during processing. This utility model can achieve the clamping and fixing of the piston rod at different heights by adjusting the position of the clamping plate 230, so as to adapt to the efficient clamping and fixing of piston rods of different lengths and the stable boring operation, making the operation more convenient and efficient.

[0023] According to another embodiment of the present invention, such as Figure 1 and Figure 3As shown, a support plate 400 is also provided on the upper part of the mounting plate 100. A shock-absorbing sleeve 500 is provided on the support plate 400. The bottom of the piston rod abuts against the shock-absorbing sleeve 500. The support plate 400 is made of Q235 steel and is fixed to the mounting plate 100 by welding. It is located on one side of the fixing plate 210 and is 30-50mm away from the clamping plate 220. Stainless steel shims can be added to the bottom of the support plate 400 to achieve fine height adjustment (adjustment range 2-15mm). The shock-absorbing sleeve 500 is attached to the upper end of the support plate 400 with silicone. The shock-absorbing sleeve 500 has multiple anti-slip protrusions inside, which can increase the stability of the clamping operation and help to buffer vibration. The shock-absorbing sleeve 500 is made of silicone rubber with a thickness of 10-15mm. Multiple rubber ball-shaped anti-slip protrusions are integrally formed on the upper surface. The anti-slip protrusions can increase the friction with the piston rod. The elasticity of the silicone rubber can buffer the boring vibration and avoid wear on the bottom of the piston rod. This utility model can achieve a firm support and fixation of the bottom of the piston rod through the shockproof sleeve 500, which greatly improves the stability of the support plate 400 support operation.

[0024] Working principle and usage of this utility model: First, it needs to be clarified that the boring device involved in this utility model is mainly used for boring various rod-shaped parts. Since the core technical improvement of this application lies in how to achieve more stable clamping and fixing of the workpiece to be processed during boring operations, the basic boring operation can be achieved with the help of existing boring machines. The specifications and models of boring machines are not limited here, but only the functions of the fixture 200 are described in detail. This utility model takes the boring of a piston rod as an example to describe its working principle and usage method in detail. The working principle is as follows: This device achieves stable boring of the piston rod based on the synergistic effect of "multi-directional fixation + elastic buffering + precise control". The specific principle is as follows: Positioning and fixing base: The mounting plate 100 is fixed to the boring machine worktable by positioning pins and bolts to ensure that it is coaxial with the boring tool holder, providing a stable reference for subsequent machining; Side wall clamping adjustment: Place the piston rod on the fixed plate 210 so that its axis coincides with the boring tool axis, push the rubber sleeve 240 on the inner side of the clamping plate 220 to fit against the side wall of the piston rod, tighten the locking bolt 250, and adjust the clamping force according to the value fed back by the pressure sensor to ensure a firm fixation and avoid damage. Height adaptation and upper limit: According to the length of the piston rod, pull out the fixing pin 300, move the pressing plate 230 up and down along the adjusting groove of the pressing plate 230 to a suitable height, so that the pressure block is aligned with the upper part of the piston rod 10-15mm, insert the fixing pin 300 to fix it, and then tighten the pressing bolt to press the piston rod with the copper pressure block to limit the up and down movement; Bottom support and vibration damping: The height of the anti-vibration sleeve 500 is adjusted by the shims at the bottom of the support plate 400 so that the bottom of the piston rod abuts against the anti-vibration sleeve 500. The anti-slip protrusions increase friction to prevent slippage. The silicone rubber material absorbs the vibration during boring, and the vibration amplitude can be reduced by more than 40%, preventing the piston rod from shifting or sagging. Collaborative CNC machining: The boring parameters are set by the PLC controller, and the controller synchronously controls the spindle rotation and the table feed to complete high-precision boring operations.

[0025] The usage method is as follows: Pre-treatment of the equipment: Check whether the TK6513 boring machine, S7-200 SMART controller and PT124G-111 pressure sensor are working properly, clean the iron filings and oil stains on the surface of the mounting plate 100 and the clamp 200, and ensure that the clamp 240 and the shockproof sleeve 500 are undamaged; Mounting plate 100 fixing: Position mounting plate 100 with the boring machine worktable using locating pins, tighten 4 bolts evenly, and check the coaxiality of mounting plate 100 with a dial indicator to ensure that the error is ≤0.02mm; Height adjustment of support plate 400: According to the length of the piston rod to be processed (e.g., 250mm), add a stainless steel shim (e.g., 3mm thick) to the bottom of support plate 400 so that the distance from the upper surface of the anti-vibration sleeve 500 to the mounting plate 100 is adapted to the bottom support of the piston rod (e.g., 60mm) to ensure that the axis of the piston rod is horizontal after placement. Piston rod clamping: Place the piston rod forging (such as a No. 45 steel part with a diameter of 50mm and a length of 250mm) on the fixing plate 210, align the piston rod axis with the boring tool shank axis, and have the bottom abut against the anti-slip protrusion of the anti-vibration sleeve 500; Push the inner sleeve 240 of the clamping plate 220 to fit against the side wall of the piston rod, tighten the locking bolt 250, observe the pressure value on the PLC control panel until it reaches 6kN, which is the optimal clamping force for the piston rod with a diameter of 50mm, and then stop tightening. Adjustment and upper fixation of clamping plate 230: Pull out the fixing pin 300 on clamping plate 220, move clamping plate 230 along the adjustment groove of clamping plate 230, so that the copper pressure block is aligned with the upper part of piston rod 10mm, insert fixing pin 300 to fix, and then tighten clamping bolt to ensure that piston rod does not move. Boring operation: Input boring parameters through PLC controller, start boring machine, and observe vibration and pressure values ​​in real time during processing to ensure stable operation of equipment; Workpiece removal and cleaning: After boring is completed, shut down the boring machine, reverse the tightening bolt and locking bolt 250, pull out the fixing pin 300, remove the clamping plate 230, take out the machined piston rod from the fixture 200, clean the residual iron filings on the surface of the fixture 200 with compressed air, and prepare for the next machining.

[0026] This invention achieves a firm and stable clamping and fixing of the piston rod through the combined action of the fixing plate 210, clamping plate 220 and pressing plate 230 in the fixture 200. It solves the problem that traditional fixtures 200 mostly use planar clamping or simple arc block contact, which have a small contact area with the side wall of the piston rod. The vibration generated by high-speed rotation during boring can easily cause the piston rod to deviate, which not only causes the roundness error of the hole to exceed the tolerance, but also aggravates the wear of the boring tool and greatly shortens the service life of the boring tool.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A boring device for piston rod forgings, comprising a boring machine, characterized in that: A mounting plate (100) is provided on the worktable of the boring machine and directly below the boring tool. A fixture (200) for fixing the forging is provided on the upper part of the mounting plate (100). The fixture (200) includes a fixing plate (210) provided on the mounting plate (100). Clamping plates (220) are provided at both ends of the fixing plate (210). A pressure plate (230) is provided on the upper part of the two clamping plates (220). A piston rod is placed between the fixing plate (210), the clamping plate (220) and the pressure plate (230). The axial direction of the piston rod coincides with the axial direction of the boring tool shank.

2. The boring device for piston rod forgings as described in claim 1, characterized in that: The inner sides of the two clamping plates (220) are respectively provided with a sleeve (240) that is adapted to the outer side wall of the piston rod. A threaded hole is provided on the side wall of one of the clamping plates (220), and a locking bolt (250) is threaded into the threaded hole. Tightening the locking bolt (250) can increase the clamping force of the two sleeves (240).

3. The boring device for piston rod forgings as described in claim 2, characterized in that: The clamping plate (230) has an adjustment groove, and the upper part of the clamping plate (220) has multiple adjustment holes, in which a fixing pin (300) is inserted.

4. The boring device for piston rod forgings as described in claim 1, characterized in that: The upper part of the mounting plate (100) is also provided with a support plate (400), and a shock-absorbing sleeve (500) is provided on the support plate (400), with the bottom of the piston rod abutting against the shock-absorbing sleeve (500).

5. The boring device for piston rod forgings as described in claim 3, characterized in that: The clamping plate (230) is also provided with a clamping screw hole, and a clamping bolt is connected to the internal thread of the clamping screw hole.

6. The boring device for piston rod forgings as described in claim 2, characterized in that: The jacket (240) is a rubber sleeve.

7. The boring device for piston rod forgings as described in claim 4, characterized in that: The shockproof sleeve (500) has multiple anti-slip protrusions inside.

8. The boring device for piston rod forgings as described in claim 7, characterized in that: The anti-slip protrusions are rubber spherical structures.

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