Precise boring clamp
By designing a precision boring fixture including a fixture base, connecting column, cylinder seat, cylinder clamp and expansion sleeve, the problems of difficulty and cost of crankshaft boring in the prior art are solved, and efficient and automatic boring and refining are achieved.
Patent Information
- Application Number
- CN202421419768.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The prior art is difficult and costly when performing engine crankshaft boring refining, making it difficult to meet the requirements of precision position.
A precision boring fixture is designed, including a fixture base, connecting column, cylinder seat, clamp and expansion sleeve. The connecting column is driven by the machine tool to rotate, so that the fixture base can rotate as a whole, achieving balanced clamping and boring refining of the workpiece.
It reduces the difficulty and cost of crankshaft boring refining, improves production efficiency, reduces labor costs, and realizes automatic boring refining.
Smart Images
Figure CN222660786U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of clamps, in particular to a precision boring clamp. Background Art
[0002] The crankshaft is the most important component in the engine. It bears the force transmitted from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. The crankshaft is subjected to the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, which makes the crankshaft bear bending and torsional loads. For the crankshaft of an automotive engine, in order to overcome the centrifugal force, the crankshaft needs to be bored and finished. However, since there are position requirements for the hole of the crankshaft journal and the hole on the crankshaft, if the ordinary method is used for boring and finishing, a precise follow-up machine tool is required. However, this method is costly. In order to reduce the difficulty and cost of crankshaft boring and finishing, this boring fixture has been developed to improve production efficiency and reduce labor costs. Utility Model Content
[0003] The main purpose of the utility model is to provide a precision boring fixture, which can effectively solve the problems of high difficulty and high cost in the background technology.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a precision boring fixture, including a fixture base, a connecting column is installed on the lower surface of the fixture base, a cylinder seat is fixedly installed on the upper surface of the fixture base, a cylinder clamp and an expansion sleeve are arranged inside the cylinder seat, and the workpiece is clamped inside the cylinder clamp and the expansion sleeve.
[0005] Preferably, a flange is provided at the upper end of the connecting column, and the connecting column is connected to the lower surface of the clamp base via the flange.
[0006] Preferably, a cover plate is installed on the upper surface of the cylinder seat, and the cover plate is pressed on the upper end of the expansion sleeve.
[0007] Preferably, a counterweight is fixedly mounted on one side surface of the clamp base.
[0008] Preferably, a positioning block and a fixing block are fixedly mounted on one side of the upper surface of the clamp base.
[0009] Compared with the prior art, the utility model has the following beneficial effects:
[0010] (1) Adjust the position of the fixture base, combine the connecting column with the machine tool, adjust the balance of the entire fixture, and drive the connecting column to rotate. At the same time, the fixture base can rotate as a whole, so that the rotating fixture reaches a balanced state. At this time, the workpiece is placed inside the barrel seat. At this time, the expansion sleeve and the barrel clamp work to clamp the workpiece. At this time, the calibration is completed, the machine tool is started, and the boring finishing work is completed, which reduces the difficulty and cost of crankshaft boring finishing. Therefore, this boring fixture is developed to improve production efficiency and reduce labor costs. By rotating the machine tool, the specified programming code is written to complete automatic boring finishing. The hole on the engine crankshaft is the oil channel. In order to reduce the mass of the crankshaft and the centrifugal force generated during movement, the crankshaft journal is often made hollow. However, the hole of the crankshaft and the tooling hole when the crankshaft is connected and assembled into an assembly have relevant precise position requirements. Therefore, this fixture is developed, which greatly improves production efficiency and saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a structural schematic diagram of a precision boring fixture of the utility model;
[0012] Figure 2 This is a front structural schematic diagram of a precision boring fixture of the utility model;
[0013] Figure 3 The utility model is a schematic diagram of a top view of the structure of a precision boring fixture.
[0014] In the figure: 1. connecting column; 2. flange; 3. fixture base; 4. counterweight block; 5. positioning block; 6. fixing block; 7. cover plate; 8. expansion sleeve; 9. collet; 10. collet seat; 11. workpiece. DETAILED DESCRIPTION
[0015] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] like Figure 1 , 2, 3 shows a precision boring fixture, comprising a fixture base 3, a connecting column 1 is installed on the lower surface of the fixture base 3, a cartridge seat 10 is fixedly installed on the upper surface of the fixture base 3, a cartridge clamp 9 and a expansion sleeve 8 are arranged inside the cartridge seat 10, a workpiece 11 is clamped inside the cartridge clamp 9 and the expansion sleeve 8, the position of the fixture base 3 is adjusted, the connecting column 1 is combined with the machine tool, the balance of the entire fixture is adjusted, the machine tool drives the connecting column 1 to rotate, and at the same time, the fixture base 3 can be rotated as a whole, so that the rotating fixture reaches a balanced state, at this time, the workpiece 11 is placed inside the cartridge seat 10, at this time, the expansion sleeve 8 and the cartridge clamp 9 work to clamp the workpiece 11, at this time, the calibration is completed, the machine tool is started, the boring finishing work is completed, the difficulty and cost of crankshaft boring finishing are reduced, and thus this boring fixture is developed to improve production efficiency and reduce labor costs, and the specified programming code is written through the rotation of the machine tool to complete automatic boring finishing. The hole on the engine crankshaft is the oil channel. In order to reduce the mass of the crankshaft and the centrifugal force generated during movement, the crankshaft journal is often made hollow. However, the hole of the crankshaft and the tooling hole when the crankshaft is connected and assembled into an assembly have related precise positioning requirements. Therefore, this fixture was developed, which greatly improved production efficiency and saved labor costs.
[0017] like Figure 1 As shown, a flange 2 is provided at the upper end of the connecting column 1, and the connecting column 1 is connected to the lower surface of the clamp base 3 through the flange 2, which can make the connection relationship between the connecting column 1 and the clamp base 3 more stable.
[0018] like Figure 1 As shown, a cover plate 7 is installed on the upper surface of the cartridge seat 10, and the cover plate 7 is pressed on the upper end of the expansion sleeve 8, so that the cover plate 7 covers the entire expansion sleeve 8 and the cartridge clamp 9, so that the expansion sleeve 8 and the cartridge clamp 9 have better stability.
[0019] like Figure 1 As shown, a counterweight 4 is fixedly mounted on one side surface of the fixture base 3. Since the workpiece is clamped eccentrically, the counterweight 4 can achieve balance when the entire fixture passes through the rotating axis of the machine tool.
[0020] like Figure 1 As shown, a positioning block 5 and a fixing block 6 are fixedly installed on one side of the upper surface of the clamp base 3. The positioning block 5 and the fixing block 6 cooperate with each other to achieve the function of counterweight and balance.
[0021] The working principle of this precision boring fixture:
[0022] When in use, the position of the fixture base 3 is adjusted, the connecting column 1 is combined with the machine tool, and the balance of the entire fixture is adjusted. The machine tool drives the connecting column 1 to rotate, and at the same time, the fixture base 3 can be rotated as a whole, so that the rotating fixture reaches a balanced state. At this time, the workpiece 11 is placed inside the cylinder seat 10. At this time, the expansion sleeve 8 and the cylinder clamp 9 work to clamp the workpiece 11. At this time, the calibration is completed, the machine tool is started, and the boring and finishing work is completed, which reduces the difficulty and cost of crankshaft boring and finishing. Therefore, this boring fixture is developed to improve production efficiency and reduce labor costs. By rotating the machine tool, the specified programming code is written to complete automatic boring and finishing. The hole on the engine crankshaft is the oil channel. In order to reduce the mass of the crankshaft and the centrifugal force generated during movement, the crankshaft journal is often made hollow. However, the hole of the crankshaft and the tooling hole when the crankshaft is connected and assembled into an assembly have relevant precise positioning requirements, so this clamp was developed, which greatly improves the production efficiency and saves labor costs. The cover plate 7 covers the entire expansion sleeve 8 and the collet 9, so that the expansion sleeve 8 and the collet 9 have better stability. The positioning block 5 and the fixing block 6 are practical to cooperate to achieve the effect of counterweight and balance. Since the workpiece is clamped eccentrically, and the entire clamp passes through the rotating axis of the machine tool, balance can be achieved through the counterweight block 4.
[0023] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.
Claims
1. A precision boring fixture, comprising a fixture base (3), characterized in that: A connecting column (1) is installed on the lower surface of the clamp base (3), and a cartridge seat (10) is fixedly installed on the upper surface of the clamp base (3). A cartridge clamp (9) and an expansion sleeve (8) are arranged inside the cartridge seat (10), and a workpiece (11) is clamped inside the cartridge clamp (9) and the expansion sleeve (8).
2. A precision boring fixture according to claim 1, characterized in that: The upper end of the connecting column (1) is provided with a flange (2), and the connecting column (1) is connected to the lower surface of the clamp base (3) via the flange (2).
3. A precision boring fixture according to claim 2, characterized in that: A cover plate (7) is installed on the upper surface of the cylinder seat (10), and the cover plate (7) is pressed on the upper end of the expansion sleeve (8).
4. A precision boring fixture according to claim 3, characterized in that: A counterweight block (4) is fixedly mounted on one side surface of the clamp base (3).
5. A precision boring fixture according to claim 4, characterized in that; A positioning block (5) and a fixing block (6) are fixedly mounted on one side of the upper surface of the clamp base (3).