An adjustable trepanning tool for a cylinder block casting

Abstract

An adjustable sleeve drilling tool for a cylinder block casting, comprising a Morse tool holder, a tool body, two tool components and a magnetic tooth-shaped positioning block; wherein the Morse tool holder is fixedly connected with the tool body, the tool body is provided with two symmetrical tool installation grooves, the tool installation grooves are provided with tooth block positioning grooves and dovetail grooves along the diameter direction of the tool body, the two tool components are respectively arranged in the two tool installation grooves and can slide in the dovetail grooves in the diameter direction, the magnetic tooth-shaped positioning block is engaged in the tooth block positioning groove, the tool components are connected with the magnetic tooth-shaped positioning block and are fixed on the tool body, the position of the tool components in the diameter direction of the tool body is adjusted through sliding in the dovetail groove, so that the drilling diameter and the coring diameter of the sleeve drilling tool are adjusted, and the sampling needs of different cylinder block castings are met. The present application achieves the effects of simple structure, simplified operation, improved efficiency, reduced cost, safety and reliability and one drill for multiple uses.

Description

Technical Field

[0001] This invention relates to a special machining tool, specifically an adjustable bushing drill for cylinder block castings, belonging to the field of mechanical manufacturing technology. Background Technology

[0002] After the cylinder block blanks for marine diesel engines are cast, samples need to be collected for chemical composition analysis and various mechanical property tests to verify whether the performance parameters of the finished casting meet the expected technical requirements. A common sampling method is to use a core drill. A core drill, also known as a circumferential core drill, is a drill bit that machines holes in solid materials using a circular cutting method. Its high-efficiency machining capability of drilling cores is unmatched by other cutting tools.

[0003] The technical requirements for sampling cylinder blocks vary across different marine diesel engine models, generally falling within the following ranges: drilling diameter Φ65-Φ80mm, core diameter Φ28-Φ32mm, and depth 90-230mm. Existing nesting tools have fixed drilling and core diameters. To achieve full coverage of nesting specifications, essentially each diesel engine model requires a dedicated nesting tool. Such frequent tool changes not only lead to low operational efficiency and increased process costs, but also represent a waste of resources, especially considering the infrequent use of nesting tools of rarely used sizes. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention aims to provide an adjustable nesting drill for cylinder block castings. This drill adjusts the drill diameter and core diameter of the cutting tool via an adjustment mechanism, thereby meeting the sampling needs of various sizes of marine diesel engine cylinder block castings. This achieves the effects of simplifying operation, improving work efficiency, reducing costs, ensuring safety and reliability, and enabling multiple uses with a single tool.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An adjustable nesting drill for cylinder block castings, characterized in that: the adjustable nesting drill includes a Morse cutter holder, a cutter body, two cutter components, and a magnetic toothed positioning block; the Morse cutter holder is fixedly connected to the tail of the cutter body, the top of the cutter body is provided with two symmetrically arranged cutter mounting slots, the cutter mounting slots are provided with toothed block positioning slots and dovetail slots along the diameter direction of the cutter body, the two cutter components are respectively connected to the two cutter mounting slots through the dovetail slots and can slide in the dovetail slots along the diameter direction of the cutter body, the magnetic toothed positioning block is engaged in the toothed block positioning slots, and the cutter components are connected to the magnetic toothed positioning block and fixed to the cutter body by connecting screws;

[0007] By sliding in the dovetail groove, the tool component adjusts its position in the diameter direction of the tool body, thereby adjusting the drilling diameter and core diameter of the nesting drill to meet the sampling needs of cylinder block castings of different specifications.

[0008] Furthermore, the tool body and the Morse tool holder are integrated into one structure, and a limiting groove to prevent rotation is provided on the shoulder section where the tool body and the Morse tool holder are connected.

[0009] Furthermore, two chip removal grooves are symmetrically provided on the tool body, and the two chip removal grooves are respectively connected to the two tool mounting grooves.

[0010] Furthermore, the cutting tool component includes a tool pad and a cutting blade. The tool pad has a blade mounting groove and a positioning groove. The magnetic toothed positioning block is embedded in the positioning groove and fixed to the tool pad by connecting screws. The cutting blade is fixed in the blade mounting groove by fastening screws.

[0011] Furthermore, the lower part of the blade pad is provided with a raised dovetail block, which is connected to and moves relative to the dovetail groove to adjust the position of the blade component in the diameter direction of the blade body.

[0012] Furthermore, when the connecting screw is tightened, the magnetic toothed positioning block engages tightly with the toothed positioning groove, and the cutting tool component is locked and cannot move; when the connecting screw is loosened, the magnetic toothed positioning block disengages from the toothed positioning groove and is attracted to the positioning groove, and the cutting tool component can move and adjust its position.

[0013] Compared with existing casing drills, the present invention achieves the following beneficial effects:

[0014] The cutting tool component achieves positional movement in the diameter direction of the cutting tool body through the cooperation of the dovetail mechanism and the toothed positioning block locking structure, and can freely switch between the two working states of adjustment and locking. This allows for the free combination of different size specifications of the nesting drill bit to meet the requirements of the drill diameter and core outer diameter, avoiding the unreasonable situation of equipping each model with a dedicated nesting tool. It achieves the effects of simple and reasonable structure, simplified operation difficulty, improved nesting operation efficiency, reduced procurement costs, and safety and reliability. Attached Figure Description

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

[0016] Figure 2 This is an exploded view of the structure of the present invention.

[0017] In the diagram: 1—Moore's tool holder, 2—limiting groove, 3—chip removal groove, 4—tool body, 5—magnetic toothed positioning block, 6—positioning groove, 7—tool pad, 8—cutting insert, 9—fastening screw, 10—connecting screw, 11—tooth block positioning groove, 12—dovetail groove, 13—tool component, 14—tool mounting groove, 15—insert mounting groove, 19—dovetail block. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Based on the following embodiments, all other technical solutions obtained by those skilled in the art without creative effort should fall within the scope of protection claimed by the present invention.

[0019] See also Figure 1 and Figure 2 The adjustable bushing drill bit of the present invention includes a Morse cutter holder 1, a cutter body 4, two sets of cutter components 13 and two magnetic toothed positioning blocks 5; wherein, the cutter body 4 and the Morse cutter holder 1 are an integrated structure.

[0020] The Mo-type tool holder 1 is fixedly connected to the tail of the tool body 4 and can be used in various machine tools. The shoulder of the tool body 4 connected to the Mo-type tool holder 1 is provided with a limit groove 2 to prevent the tool from loosening and rotating during operation.

[0021] The tool body 4 has two axial spiral chip removal grooves 3 symmetrically opened on both sides, which can quickly remove chips.

[0022] The top of the tool body 4 is provided with two symmetrically arranged tool mounting slots 14. The groove wall of the tool mounting slot 14 is provided with a tooth block positioning slot 11, and the bottom is provided with a dovetail groove 12. The longitudinal direction of the tooth block positioning slot 11 and the dovetail groove 12 is arranged along the diameter direction of the tool body 4. The two tool mounting slots 14 are respectively connected to the two chip removal slots 3.

[0023] Two sets of tool components 13 are respectively connected to two tool mounting slots 14. One set of tool components 13 is used to cut the bore diameter, and the other set of tool components 13 is used to cut the core diameter. Each tool component 13 includes a tool pad 7 and a cutting insert 8. Figure 2 The blade pad 7 has a blade mounting groove 15 and a positioning groove 6, and a raised dovetail block 19 at the bottom; the cutting blade 8 is installed and fixed in the blade positioning groove 15 by fastening screws 9 to ensure that the cutting blade 8 is stable and does not loosen when the tool is working.

[0024] The dovetail block 19 at the bottom of the cutter pad 7 engages with the dovetail groove 12 at the bottom of the cutter mounting groove 14, thereby restricting the lateral and longitudinal positional movement of the cutter pad 7; the cutter pad 7 moves radially through the relative movement of the dovetail block 19 in the dovetail groove 12, thereby adjusting the position of the cutter component 13 in the diametrical direction of the cutter body 4.

[0025] The magnetic toothed positioning block 5 is inserted into and engaged in the toothed positioning groove 11 of the tool mounting groove 14. Simultaneously, the magnetic toothed positioning block 5 is embedded in the positioning groove 6 and connected to the tool pad 7 via a connecting screw 10. When the connecting screw 10 is loosened, the magnetic toothed positioning block 5 is in a loosened state from the toothed positioning groove 11, and the magnetic toothed positioning block 5 is attracted to the positioning groove 6. The tool pad 7 can move radially, allowing the tool component 13 to be freely assembled into the required casing drill for any size and specification of drill diameter and core diameter. When the connecting screw 10 is tightened, it pulls the magnetic toothed positioning block 5 into a tight engagement with the toothed positioning groove 11, locking the tool pad 7 in three dimensions and preventing it from moving, thus ensuring the stability of the tool component 13 during operation.

[0026] like Figure 2 The specific working steps of this invention are as follows:

[0027] The first step is to install and fix the cutting insert 8 in the insert mounting groove 15 with the fastening screw 9, and connect it with the tool pad 7 to form the tool component 13.

[0028] The second step is to install and fix the magnetic tooth-shaped positioning block 5 in the positioning groove 6 of the knife pad 7 using the connecting screw 10, and attach it to the inner wall of the positioning groove 6.

[0029] The third step is to insert the magnetic toothed positioning block 5 into the toothed positioning groove 11 of the tool body 4. The tool pad 7 cooperates with the dovetail groove 12 of the tool body 4 through the dovetail block 19 at the bottom to form a sliding mechanism.

[0030] Fourth step, move the cutter pad 7 to the position of the required die diameter, tighten the connecting screw 10, and lift the magnetic toothed positioning block 5 to engage with the toothed positioning groove 11 to fix the position of the cutter pad 7.

[0031] Fifth step: Using the same steps one through four above, assemble, install and adjust the other cutting tool component 13, determine the position of the core diameter, and tighten the connecting screw 10 to fix the cutting tool pad 7.

[0032] The sixth step involves the machine tool operating to drive the nesting drill bit to complete the nesting and core extraction work.

[0033] Obviously, the above embodiments are exemplary and non-limiting. These embodiments are merely some, not all, implementations of the present invention. The present invention is not limited to the details of the above embodiments, and can be implemented in other forms without departing from the spirit or essential characteristics of the invention. Therefore, the scope of protection of the present invention is defined by the claims rather than the foregoing; all elements and variations falling equivalent to those in the claims should be included within the scope of the present invention.

Claims

1. An adjustable bushing drill for cylinder block castings, characterized in that: The adjustable casing drill bit includes a Morse code holder, a tool body, two tool components, and a magnetic toothed positioning block. The Morse code holder is fixedly connected to the tail of the tool body. The top of the tool body has two symmetrically arranged tool mounting slots. The tool mounting slots have toothed positioning slots and dovetail slots along the diameter direction of the tool body. The two tool components are respectively connected to the two tool mounting slots through the dovetail slots and can slide in the dovetail slots along the diameter direction of the tool body. The magnetic toothed positioning block engages in the toothed positioning slots. The tool components are connected to the magnetic toothed positioning block and fixed to the tool body by connecting screws. By sliding in the dovetail groove, the tool component adjusts its position in the diameter direction of the tool body, thereby adjusting the drilling diameter and core diameter of the nesting drill to meet the sampling needs of cylinder block castings of different specifications. The cutting tool component includes a tool pad and a cutting blade. The tool pad has a blade mounting groove and a positioning groove. The magnetic toothed positioning block is embedded in the positioning groove and fixed to the tool pad by connecting screws. The cutting blade is fixed in the blade mounting groove by fastening screws. The lower part of the blade pad is provided with a raised dovetail block, which is connected to and moves relative to the dovetail groove to adjust the position of the blade component in the diameter direction of the blade body. When the connecting screw is tightened, the magnetic toothed positioning block engages tightly with the toothed positioning groove, and the cutting tool component is locked and cannot move; when the connecting screw is loosened, the magnetic toothed positioning block disengages from the toothed positioning groove and is attracted to the positioning groove, and the cutting tool component can move and adjust its position.

2. The adjustable bushing drill for cylinder block castings according to claim 1, characterized in that: The tool body and the Morse tool holder are integrated into one structure, and a limiting groove is provided at the shoulder where the tool body and the Morse tool holder are connected to prevent rotation.

3. The adjustable bushing drill for cylinder block castings according to claim 1, characterized in that: The tool body is provided with two symmetrical chip removal grooves, which are respectively connected to the two tool mounting grooves.

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