Positioning shot blasting workbench suitable for multi-model diesel engine connecting rods

Abstract

The positioning shot blasting workbench for multi-type diesel engine connecting rods is provided, which comprises a circular plate-shaped workbench, a plurality of independent T-shaped grooves and a waist-shaped long hole one outside the T-shaped grooves are symmetrically arranged on a cross center line of the workbench, a plurality of independent T-shaped grooves corresponding in position are also arranged in four areas of the workbench separated by the cross center line, a plurality of marking holes for positioning and marking of circular holes of big end and small end of different types of connecting rods are customized on the workbench, and a plurality of waist-shaped long holes two are symmetrically arranged in four areas on both sides of a vertical center line of the workbench.

Description

Technical Field

[0001] This utility model belongs to the field of diesel engine connecting rod processing technology, specifically relating to a positioning shot peening worktable that can be adapted to connecting rods of multiple diesel engine models. Background Technology

[0002] Connecting rods, as a crucial power transmission component in marine diesel engines, convert the reciprocating motion of the piston into the rotational motion of the crankshaft and transmit combustion gas pressure to drive the crankshaft to output power. In practical operation, the inner walls of the large / small end bores and the rod body of the connecting rod are subjected to cyclic bending stresses, which can easily lead to fatigue wear and even fracture. Currently, shot peening is commonly used to strengthen connecting rods. High-speed steel shot impacts the material surface, causing plastic deformation and forming a residual compressive stress layer, thereby improving the connecting rod's fatigue strength, wear resistance, and stress corrosion resistance, while also eliminating machining stresses.

[0003] Due to the diverse structures and sizes of connecting rods, it is difficult to accurately position them on the worktable to meet the demands of high-quality and high-efficiency production. Our patent application, number 202020735138.7, entitled "Worktable for Shot Peening Equipment with Quick Fixing and Accurate Positioning Functions," discloses a worktable for connecting rod positioning. This worktable uses T-slots and positioning blocks around the workpiece to fix it to the worktable. These positioning blocks are fixed to the worktable by T-bolts that fit within the T-slots, allowing for adjustable positioning. While this solves the problem of marking the large end of the connecting rod, the following issues exist in actual production: 1) The worktable is an equilateral polygonal structure, which makes it difficult to accurately position the workpiece during installation. During the process, the polygonal edges often bump into operators, posing a safety hazard. Furthermore, the equilateral polygonal structure has a small usable area. 2) The number of workpieces positioned on the worktable is limited, making this structure unsuitable for shot peening of multiple types of connecting rods in large batches. 3) Although the worktable has multiple through holes for steel shot from the shot peening equipment, steel shot often accumulates on the worktable during actual use. Moreover, the worktable only has a center positioning function, allowing only one connecting rod to be processed at a time, making it impossible to process multiple types of workpieces in large batches. Therefore, improvements are necessary to address these issues. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a shot peening worktable for positioning connecting rods of various diesel engines. By optimizing the structure of the shot peening worktable for connecting rod positioning, multiple oblong holes (first and second) are provided on the circular worktable surface for weight reduction and steel shot passage. This eliminates the safety hazard of operators being bumped or knocked over by the polygonal structure of the worktable, increases the usable area, reduces weight, and lowers motor losses. The oblong holes (first and second) allow steel shot to pass through quickly, solving the problem of steel shot accumulation on the worktable surface. The design of multiple marking holes located on the T-slots enables rapid positioning and marking of different types of connecting rods on the worktable. With the large weight of the connecting rod itself and the elastic pad with a high coefficient of friction, the connecting rod has strong static friction on the worktable surface, which can overcome the impact force brought by the steel shot during shot peening. Shot peening strengthening treatment of connecting rods can be achieved without the need for positioning blocks, improving work efficiency, avoiding collisions with workers caused by positioning blocks, and improving safety.

[0005] The technical solution adopted in this utility model is as follows: a positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models, including a circular plate-shaped worktable and an elastic pad with the same shape and structure as the worktable and fixed to the surface of the worktable. The worktable is concentrically set with the power output end of the machine tool in the shot peening strengthening equipment, and the worktable is detachably fixed to the power output end of the machine tool by a central support block that can reserve a gap for steel shot to pass through and multiple support blocks evenly distributed around the outer periphery of the central support block. Multiple individual T-slots and waist-shaped elongated holes located outside the T-slots are symmetrically formed on the cross center line of the worktable. Multiple individual T-slots with corresponding positions are also provided in the four areas divided by the cross center line on the worktable. Multiple marking holes are customized on the worktable for positioning and marking the round holes of the large end and small end of different models of connecting rods, and one or more marking holes are distributed on each T-slot. Multiple waist-shaped elongated holes are symmetrically provided in the four areas on both sides of the vertical center line of the worktable.

[0006] The worktable has two T-slots at the horizontal center line position, each with a marking hole. The marking hole is located on the same straight line as the marking holes on the corresponding T-slots above and below it. The ends of the two T-slots at the horizontal center line position are provided with through holes for steel shot to pass through.

[0007] Furthermore, the two ends of the two T-slots at the vertical center line of the workbench and the position between the two ends are provided with marking holes for marking the positions of the round holes at the large and small ends of different models of connecting rods.

[0008] Furthermore, each end of a plurality of T-slots in the four regions separated by the cross center line on the workbench is provided with a marking hole, and a marking hole is also provided between the two ends of the outermost T-slots in the four regions.

[0009] Furthermore, the T-slots and marking holes in the four areas separated by the cross center line on the worktable are symmetrically distributed along the vertical center line.

[0010] Furthermore, the workbench is provided with two waist-shaped elongated holes on both sides of the T-slot on the vertical center line and on the outermost T-slot of the four areas.

[0011] Furthermore, the workbench is evenly distributed with multiple lifting holes for installing lifting rings.

[0012] Furthermore, the central support block concentrically arranged at the bottom of the workbench is fixed to the workbench by screws. The support block is a right-angled plate with an arc-shaped bevel, and the height of the support block is greater than the diameter of the steel shot. The four support blocks evenly distributed around the central support block are fixed to the workbench and the power output end of the machine tool by screws and bolts respectively.

[0013] Furthermore, the worktable is made of 7075 aluminum alloy.

[0014] Advantages of this utility model compared to the prior art: 1. This technical solution optimizes the structure of the shot peening worktable used for connecting rod positioning. It adopts multiple waist-shaped elongated holes 1 and 2 on the circular worktable surface for weight reduction and steel shot passage. This eliminates the safety hazard of operators being bumped by the polygonal structure worktable during use, increases the usable area, reduces weight, and reduces motor losses. The design of waist-shaped elongated holes 1 and 2 allows steel shot to pass through quickly, solving the problem of steel shot accumulation on the worktable surface. 2. This technical solution features a design structure with marking holes on multiple T-slots for different types of connecting rods, enabling rapid positioning of multiple types of connecting rods in large batches. With the support of the connecting rod's own heavy weight and the elastic pad with a high coefficient of friction, the connecting rod has strong static friction on the worktable surface, which can overcome the impact force brought by steel shot during shot peening. Shot peening strengthening treatment of connecting rods can be achieved without the need for positioning blocks, reducing tooling design, lowering production costs, improving work efficiency, avoiding collisions with workers caused by positioning blocks, and improving safety during use. 3. This technical solution has a novel design and is easy to operate. The workbench is made of 7075 aluminum alloy, which has lightweight, high strength and high buffering energy absorption characteristics. It can absorb the impact force of steel shot during shot peening. With the help of the laid elastic pad, the steel shot is prevented from directly contacting the workbench surface during shot peening. The above two measures can effectively improve the service life of the workbench. Attached Figure Description

[0015] Figure 1 This is a front view of the structure of this utility model; Figure 2This is a bottom view of the structure of this utility model; Figure 3 This is a schematic diagram showing the state of the three connecting rods when positioning the markers on the workbench of this utility model. Figure 4 This is a schematic diagram showing the state of the five connecting rods with positioning marks on the workbench of this utility model. Figure 5 This is a schematic diagram showing the state of the two connecting rods when they are positioned on the workbench of this utility model. Detailed Implementation

[0016] The following will refer to the embodiments of this utility model. Figure 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0019] A positioning shot peening worktable that can be adapted to connecting rods of various diesel engine models, such as... Figure 1-5As shown, the system includes a circular plate-shaped worktable 1 and an elastic pad 2 with the same shape and structure as the worktable 1, fixed to the upper surface of the worktable 1. The worktable 1 is concentrically arranged with the machine tool power output end of the shot peening equipment, and is detachably fixed to the machine tool power output end by an intermediate support block 3 that allows for the passage of steel shot and multiple support blocks 4 evenly distributed around the outer periphery of the intermediate support block 3. Specifically, the intermediate support block 3 concentrically arranged at the bottom of the worktable 1 is fixed to the worktable 1 by screws. The support block 4 is a right-angled plate with an arc-shaped bevel, and the height of the support block 4 is greater than the diameter of the steel shot. The four support blocks 4 evenly distributed around the central support block 3 are fixed to the worktable 1 and the machine tool power output end respectively by screws and bolts. The worktable 1 has multiple lifting holes 10 evenly distributed around its circumference for installing lifting rings 9. The worktable 1 has multiple individual T-slots 5 and waist-shaped elongated holes 6 located outside the T-slots 5 symmetrically formed on the cross center line. The worktable 1 is divided into four areas by the cross center line. The workbench 1 also has multiple individual T-slots 5 with corresponding positions. Multiple marking holes 7 are custom-made on the workbench 1 to mark the round holes at the large and small ends of different models of connecting rods 12. Each T-slot 5 has one or more marking holes 7. Multiple waist-shaped elongated holes 8 are symmetrically arranged in four areas on both sides of the vertical center line of the workbench 1. Specifically, waist-shaped elongated holes 8 are provided on both sides of the T-slots 5 on the vertical center line of the workbench 1 and on the outermost T-slots 5 in the four areas. In the above structure, by optimizing the shot peening workbench 1 structure for positioning the connecting rod 12, multiple waist-shaped elongated holes 6 and 8 are provided on the surface of the circular workbench 1 for weight reduction and steel shot passage. This eliminates the safety hazard of operators being bumped during use of the polygonal workbench 1, increases the usable area, reduces weight, and lowers motor losses. The design of the waist-shaped elongated holes 6 and 8 allows steel shot to pass through quickly, solving the problem of steel shot accumulation on the workbench 1 surface. The design of the waist-shaped elongated hole 6 and the waist-shaped elongated hole 8, as well as the unobstructed marking hole 7 after the connecting rod 12 is positioned, greatly increases the area through which steel shot passes during shot peening operations. This not only reduces the weight of the shot peening workbench 1, but also facilitates the recovery of shot material that falls onto the workbench 1, preventing shot material accumulation.

[0020] The distribution of T-slots 5 and marking holes 7 is as follows: Each of the two T-slots 5 at the horizontal centerline of the workbench 1 has a marking hole 7, and this marking hole 7 is on the same straight line as the marking holes 7 on the corresponding T-slots 5 above and below it. Both ends of the two T-slots 5 at the horizontal centerline of the workbench 1 have through holes 11 for steel shot to pass through. Specifically, both ends of the two T-slots 5 at the vertical centerline of the workbench 1, as well as the position between the two ends, are provided with marking holes 7 for marking the positions of the round holes at the large and small ends of different models of connecting rods 12. Specifically, both ends of multiple T-slots 5 in the four areas separated by the cross centerline on the workbench 1 are provided with marking holes 7, and the position between the two ends of the outermost T-slot 5 in the four areas is also provided with a marking hole 7. Specifically, the T-slots 5 and marking holes 7 in the four areas separated by the cross centerline on the workbench 1 are symmetrically distributed along the vertical centerline.

[0021] This technical solution, based on the design structure of different types of connecting rods 12, sets multiple marking holes 7 on the T-slots 5 to achieve rapid positioning of multiple types of connecting rods 12 in large batches. With the cooperation of the heavy weight of the connecting rod 12 itself and the elastic pad 2 with a high coefficient of friction, the connecting rod 12 has a strong static friction force on the worktable 1, which can overcome the impact force brought by the steel shot during the shot peening process. There is no need to design positioning blocks to achieve shot peening strengthening treatment of connecting rods 12, reducing tooling design, reducing production costs, improving work efficiency, avoiding collisions with workers caused by positioning blocks, and improving safety in use. This technical solution features a novel design and simple operation. The workbench 1 is made of 7075 aluminum alloy, which is lightweight, high-strength, and has high buffering and energy absorption properties. It can absorb the impact force of steel shot during shot peening. The elastic pad 2 prevents steel shot from directly contacting the workbench 1 surface during shot peening. The above two measures can effectively improve the service life of the workbench 1. The elastic pad 2 needs to be replaced regularly according to the wear condition to ensure high friction between it and the connecting rod 12, thereby improving the relative position of the connecting rod 12 after the positioning mark.

[0022] In this technical solution, the weight of the connecting rod 12 itself, plus the elastic pad 2 set on the worktable 1, and the marking holes 7 on the worktable 1 to accurately mark the large end and small end of the connecting rod 12, are used to start the shot peening equipment to perform shot peening treatment on the surface of the connecting rod 12. At this time, the worktable 1 is in a stationary state. Under the large weight of the connecting rod 12 itself and the elastic pad 2 (using rubber pads) with a high coefficient of friction, the impact force of steel shot on the workpiece surface can be overcome. The connecting rod 12 has a strong static friction force on the worktable 1 surface, which can overcome the impact force of steel shot. The impact force on the workpiece surface ensures the reliability of the relative position of the connecting rod 12. After field testing, it can be achieved that the connecting rod 12 can be shot-peened without positioning blocks. If the accuracy is to be improved, after the large end and small end of the connecting rod 12 are positioned, the positioning block can be fixed on the worktable 1 by T-bolts that fit into the corresponding T-slots 5. The positioning block that fits the positioning position will position the connecting rod 12. The positioning block that positions the connecting rod 12 can be set at its end or / side according to the position of the connecting rod 12.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models, characterized in that: The equipment includes a circular plate-shaped worktable (1) and an elastic pad (2) with the same shape and structure as the worktable (1) and fixed to the upper surface of the worktable (1). The worktable (1) is concentrically set with the power output end of the machine tool in the shot peening equipment. The worktable (1) is detachably fixed to the power output end of the machine tool by an intermediate support block (3) that can reserve a gap for steel shot to pass through and multiple support blocks (4) evenly distributed around the outer periphery of the intermediate support block (3). Multiple T-slots (5) are symmetrically formed on the cross center line of the worktable (1). And the waist-shaped elongated hole 1 (6) located outside the T-slot (5), and the worktable (1) is also provided with multiple T-slots (5) that exist separately and are located in the four areas separated by the cross center line. The worktable (1) is customized with multiple marking holes (7) for positioning and marking the round holes of the large end and small end of the connecting rod (12) of different models. Each T-slot (5) is provided with one or more marking holes (7). Multiple waist-shaped elongated holes 2 (8) are symmetrically provided in the four areas on both sides of the vertical center line of the worktable (1).

2. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: The workbench (1) has a marking hole (7) on each of the two T-slots (5) at the horizontal center line position, and the marking hole (7) is on the same straight line as the marking hole (7) on the T-slots (5) at the corresponding positions above and below. The ends of the two T-slots (5) at the horizontal center line position of the workbench (1) are provided with through holes (11) for steel shot to pass through.

3. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: The two T-slots (5) at the vertical center line of the workbench (1) are provided with marking holes (7) at both ends and between the two ends for marking the positions of the round holes at the large and small ends of the connecting rods (12) of different models.

4. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: Marking holes (7) are provided at both ends of multiple T-slots (5) in the four areas separated by the cross center line on the workbench (1), and marking holes (7) are also provided between the two ends of the outermost T-slots (5) in the four areas.

5. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: The T-slots (5) and marking holes (7) in the four areas separated by the cross center line on the workbench (1) are symmetrically distributed along the vertical center line.

6. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: The workbench (1) has two waist-shaped elongated holes (8) on both sides of the T-slot (5) on the vertical center line and on the outermost T-slot (5) in the four areas.

7. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: The workbench (1) has multiple lifting holes (10) evenly distributed around its circumference for installing lifting rings (9).

8. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: The middle support block (3) is concentrically arranged at the bottom of the workbench (1) and is fixed to the workbench (1) by screws. The support block (4) is a right-angle plate with an arc-shaped inclined side, and the height of the support block (4) is greater than the diameter of the steel shot. The four support blocks (4) evenly distributed around the middle support block (3) are fixed to the workbench (1) and the machine tool power output end by screws and bolts respectively.

9. The positioning shot peening worktable adaptable to connecting rods of multiple diesel engine models according to claim 1, characterized in that: The workbench (1) is made of 7075 aluminum alloy.

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