Auxiliary tool for machining anti-surge slotted hole in turbocharger
By designing auxiliary tooling for machining anti-surge slots in turbochargers, the problem of difficulty in machining silencer holes on ordinary drilling machines was solved, achieving accurate positioning of the pressure shell and improving drilling efficiency.
Patent Information
- Application Number
- CN202520548195.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-27
AI Technical Summary
The drilling of muffler holes in existing turbochargers is difficult to achieve on ordinary drilling machines, especially the machining of curved conical surfaces and spacing layouts.
An auxiliary tooling for machining anti-surge slots on turbochargers was designed, including components such as a fixed chassis, turntable, connecting seat, and clamping seat. It can clamp the pressure shell and mark the position of the muffler hole, and cooperate with a drilling machine to perform drilling.
It achieves effective clamping of the turbocharger housing and accurate positioning of the muffler hole, simplifies the drilling process, and improves processing efficiency and precision.
Smart Images
Figure CN223932653U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to the technical field of auxiliary fixtures for press shell processing, and more specifically to an auxiliary tooling for processing anti-surge groove holes on turbochargers. Background technology:
[0002] A turbocharger is essentially an air compressor that increases the intake air volume by compressing air. It utilizes the inertial force of the exhaust gases from the engine to drive a turbine within the turbine housing. The turbine, in turn, drives a coaxial impeller, which compresses the air supplied through the air filter and forces it into the cylinders. Current turbocharger housings generally consist of a compressor housing, an intermediate housing, and a turbine housing. The compressor housing is simply referred to as the pressure housing. Currently, to improve the turbocharger's anti-surge performance, an annular anti-surge groove is machined on the inner wall of the pressure housing's air inlet, and a ring of silencer holes is machined around the air inlet. Figure 1 As shown, the silencing hole is connected to the anti-surge groove to achieve anti-surge. The silencing hole is generally obtained by drilling in the later stage. However, because the contact surface of the drill hole is an arc-shaped conical surface, and the spacing between the drill holes needs to be arranged, it is relatively difficult to process it directly on an ordinary drilling machine. Therefore, it is necessary to develop a corresponding auxiliary tooling to facilitate the drilling of the silencing hole. Utility model content:
[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing an auxiliary tooling for machining anti-surge slots on turbochargers. This auxiliary tooling can clamp the turbocharger housing and mark the position of the silencer holes on the housing, facilitating drilling on a drilling machine.
[0004] An auxiliary tooling for machining anti-surge grooves on a turbocharger includes a circular fixed base. A circular boss is formed in the middle of the fixed base. A circular turntable is pivotally connected to the outer ring of the boss, and a cylindrical connecting seat is pivotally connected to the middle of the boss. A clamping seat is provided above the connecting seat. The clamping seat includes a disc-shaped central disc. A conical pressure plate is formed on the outer ring of the central disc. Several divergent clearance grooves are formed on the pressure plate. A cylindrical mounting post is formed in the middle of the central disc. A regular hexagonal limiting post is formed at the upper end of the mounting post. A stud is formed at the upper end of the limiting post. A circular positioning plate is fitted on the limiting post. Several positioning holes are formed in a ring and evenly distributed. The positioning holes are located directly above the clearance grooves. The positioning plate is clamped and fixed between the mounting post and the lower locking nut. The lower locking nut is screwed onto the stud.
[0005] The upper end of the connecting seat is formed with a D-shaped screw rod. The screw rod passes through the clamping seat and is screwed with an upper locking nut. The upper locking nut presses against the upper end surface of the stud.
[0006] Preferably, the central axis of the fixed chassis, the central axis of the turntable, the central axis of the clamping seat, and the central axis of the positioning plate are on the same straight line;
[0007] The connecting seat has several mounting holes formed on the protrusions around its perimeter, which penetrate the lower end face of the fixed chassis.
[0008] Preferably, the lower end face of the fixed chassis is formed with a stepped hole through the upper end face of the boss, and a T-shaped pin is inserted into the stepped hole. The upper end of the pin is inserted and fixed on the connecting seat, and the lower end face of the connecting seat abuts against the upper end face of the boss.
[0009] Preferably, the inner wall of the turntable is formed with an arc-shaped groove, and a number of inner balls are inserted in the groove. The inner balls are embedded in the outer wall of the boss. A number of outer balls are embedded on the lower end surface of the outer ring of the turntable, and the lower end of the outer balls abuts against the upper end surface of the fixed base.
[0010] Preferably, the number of clearance grooves on the clamping base is equal to the number of positioning holes on the positioning plate, the width of the clearance groove is not less than the diameter of the positioning hole, and the positioning holes and clearance grooves are evenly distributed in a ring around the central axis of the fixed base.
[0011] Preferably, the upper end face of the stud of the clamping seat is formed with a D-shaped insertion hole that penetrates the lower end face of the central disk, and the screw is inserted into the D-shaped insertion hole of the clamping seat.
[0012] Preferably, the diameter of the outer ring of the central disk on the clamping seat is not greater than the diameter of the outer ring of the boss on the fixed base.
[0013] The beneficial effects of this utility model are as follows:
[0014] This auxiliary tooling can clamp the pressure shell of the turbocharger and mark the position of the silencer holes on the pressure shell, which facilitates drilling on a drilling machine. Attached image description:
[0015] Figure 1 This is a schematic diagram of the structure of an existing turbocharger housing;
[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 3 This is a half-sectional structural diagram of the present invention;
[0018] Figure 4 This is a front view structural diagram of the present invention;
[0019] Figure 5 This is a three-dimensional structural diagram of the internal clamping seat of this utility model.
[0020] In the diagram: 1. Fixed base; 11. Boss; 12. Mounting hole; 13. Stepped hole; 2. Connecting seat; 21. Screw; 3. Turntable; 4. Clamping seat; 41. Center plate; 42. Pressure plate; 43. Mounting post; 44. Limiting post; 45. Screw; 46. D-type insertion hole; 5. Positioning plate; 51. Positioning hole; 6. Lower locking nut; 7. Upper locking nut; 8. Inner ball bearing; 9. Outer ball bearing; 10. Pin. Detailed implementation method:
[0021] Example: See Figures 2 to 5 As shown, an auxiliary tooling for machining anti-surge slots on a turbocharger includes a circular fixed base 1. A circular boss 11 is formed in the center of the fixed base 1. A circular turntable 3 is pivotally connected to the outer ring of the boss 11, and a cylindrical connecting seat 2 is pivotally connected to the center. A clamping seat 4 is provided above the connecting seat 2. The clamping seat 4 includes a disc-shaped central disk 41. A conical pressure plate 42 is formed on the outer ring of the central disk 41. A plurality of diverging clearance grooves 421 are formed on the pressure plate 42. A cylindrical mounting post 43 is formed in the middle of the central plate 41. A regular hexagonal limiting post 44 is formed at the upper end of the mounting post 43. A stud 45 is formed at the upper end of the limiting post 44. A circular positioning plate 5 is fitted on the limiting post 44. A plurality of positioning holes 51 are formed on the positioning plate 5 in a ring evenly distributed manner. The positioning holes 51 are located directly above the clearance groove 421. The positioning plate 5 is clamped and fixed between the mounting post 43 and the lower locking nut 6. The lower locking nut 6 is screwed onto the stud 45.
[0022] The upper end of the connecting seat 2 is formed with a screw 21 with a D-shaped cross section. The screw 21 passes through the clamping seat 4 and is screwed with an upper locking nut 7. The upper locking nut 7 presses against the upper end surface of the stud 45.
[0023] The central axis of the fixed chassis 1, the central axis of the turntable 3, the central axis of the clamping seat 4, and the central axis of the positioning plate 5 are on the same straight line; the same central axis ensures that the clamped turbocharger housing is centered; thus, when rotating and drilling, the machined slots are evenly distributed in a ring around the central axis of the turbocharger housing.
[0024] The connecting seat 2 has several mounting holes 12 formed on the protrusions 11 around it, which penetrate the lower end face of the fixed base 1. Bolts are installed in the mounting holes 12, and the fixed base 1 is fixedly connected to the worktable of the drilling machine based on the fixed base 1.
[0025] The lower end face of the fixed chassis 1 is formed with a stepped hole 13 through the upper end face of the boss 11. A T-shaped pin 10 is inserted into the stepped hole 13. The upper end of the pin 10 is inserted and fixed on the connecting seat 2. The lower end face of the connecting seat 2 abuts against the upper end face of the boss 11. That is, the connecting seat 2 and the fixed chassis 1 are pivotally connected.
[0026] The inner wall of the turntable 3 is formed with an arc-shaped groove, and a number of inner balls 8 are inserted in the groove. The inner balls 8 are embedded in the outer wall of the boss 11. A number of outer balls 9 are embedded on the lower end surface of the outer ring of the turntable 3. The lower end of the outer balls 9 abuts against the upper end surface of the fixed base 1, which is the specific pivotal connection structure between the turntable 3 and the fixed base 1.
[0027] The number of clearance grooves 421 on the clamping base 4 is equal to the number of positioning holes 51 on the positioning plate 5. The width of the clearance groove 421 is not less than the diameter of the positioning hole 51. The positioning hole 51 and the clearance groove 421 are evenly distributed in a ring around the central axis of the fixed base 1. The positioning hole 51 is paired with the clearance groove 421.
[0028] The upper end face of the stud 45 of the clamping base 4 is formed with a D-shaped insertion hole 46 that penetrates the lower end face of the central disk 41, and the screw 21 is inserted into the D-shaped insertion hole 46 of the clamping base 4.
[0029] The diameter of the outer ring of the center disk 41 on the mounting base 4 is not greater than the diameter of the outer ring of the boss 11 on the fixed base 1, so that the center disk 41 can be inserted into the air inlet of the turbocharger housing.
[0030] Working principle: This structure is an auxiliary tooling for machining anti-surge grooves on turbochargers. When in use, first remove the clamping seat 4, put the turbocharger housing on the connecting seat 2 with the air inlet of the housing facing upwards, and then install the clamping seat 4. The middle part of the clamping seat 4 will be inserted into the air inlet of the housing. The shape and structure of the pressure plate 42 will cause the housing to be centered, and its end face will abut against the turntable 3. Then, by tightening the locking nut 7, the clamping seat 4 and the turntable 3 will clamp and fix the housing, so that the housing is pivotally connected to the fixed base plate 1. The drill bit of the drilling machine is directly opposite the positioning hole 51 of the positioning plate 5. The positioning hole 51 is equivalent to the reference hole. The drill bit passes through the drill bit and the clearance groove 421 to facilitate the machining of the silencer hole on the housing. After completing one silencer hole, the housing is rotated to machine the next silencer hole.
[0031] For different sizes of pressure shells, simply replace the different positioning plates 5. The center distance and diameter of the positioning hole 51 on the positioning plate 5 are set according to the diameter and center distance of the silencing hole on the different pressure shells.
[0032] The embodiments described herein are illustrative and not intended to limit the scope of the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.
Claims
1. An auxiliary tooling for machining anti-surge slots on a turbocharger, comprising a circular fixed base (1), wherein a circular boss (11) is formed in the center of the fixed base (1), characterized in that: The outer ring of the boss (11) is pivotally connected to a circular turntable (3), and the middle is pivotally connected to a cylindrical connecting seat (2). A clamping seat (4) is provided above the connecting seat (2). The clamping seat (4) includes a disc-shaped central disc (41). The outer ring of the central disc (41) is formed with a conical pressing disc (42). Several divergent clearance grooves (421) are formed on the pressing disc (42). A cylindrical mounting post (43) is formed in the middle of the central disc (41). The upper part of the mounting post (43) is... The end is formed with a regular hexagonal limiting post (44), and the upper end of the limiting post (44) is formed with a stud (45). A circular positioning plate (5) is sleeved on the limiting post (44). Several positioning holes (51) are formed on the positioning plate (5) in a ring evenly distributed manner. The positioning holes (51) are located directly above the clearance groove (421). The positioning plate (5) is clamped and fixed between the mounting post (43) and the lower locking nut (6). The lower locking nut (6) is screwed onto the stud (45). The upper end of the connecting seat (2) is formed with a screw (21) with a D-shaped cross section. The screw (21) passes through the clamping seat (4) and is screwed with an upper locking nut (7). The upper locking nut (7) presses against the upper end surface of the stud (45).
2. The auxiliary tooling for machining anti-surge grooves on a turbocharger according to claim 1, characterized in that: The central axis of the fixed chassis (1), the central axis of the turntable (3), the central axis of the clamping seat (4), and the central axis of the positioning plate (5) are on the same straight line; The connecting seat (2) has several mounting holes (12) formed on the bosses (11) around it, which penetrate the lower end face of the fixed base (1).
3. The auxiliary tooling for machining anti-surge grooves on a turbocharger according to claim 2, characterized in that: The fixed base (1) has a stepped hole (13) formed in the middle of the lower end face of the platform (11) through the upper end face of the platform (11). A T-shaped pin (10) is inserted into the stepped hole (13). The upper end of the pin (10) is inserted and fixed on the connecting seat (2). The lower end face of the connecting seat (2) abuts against the upper end face of the platform (11).
4. The auxiliary tooling for machining anti-surge grooves on a turbocharger according to claim 2, characterized in that: The inner wall of the turntable (3) is formed with an arc-shaped groove, and a number of inner balls (8) are inserted in the groove. The inner balls (8) are embedded in the outer wall of the boss (11). A number of outer balls (9) are embedded on the lower end surface of the outer ring of the turntable (3), and the lower end of the outer balls (9) abuts against the upper end surface of the fixed base (1).
5. The auxiliary tooling for machining anti-surge grooves on a turbocharger according to claim 2, characterized in that: The number of clearance grooves (421) on the clamping base (4) is equal to the number of positioning holes (51) on the positioning plate (5). The width of the clearance groove (421) is not less than the diameter of the positioning hole (51). The positioning hole (51) and the clearance groove (421) are evenly distributed in a ring around the central axis of the fixed base (1).
6. The auxiliary tooling for machining anti-surge grooves on a turbocharger according to claim 2, characterized in that: The upper end face of the stud (45) of the clamping base (4) is formed with a D-shaped insertion hole (46) that penetrates the lower end face of the central disk (41), and the screw (21) is inserted into the D-shaped insertion hole (46) of the clamping base (4).
7. The auxiliary tooling for machining anti-surge grooves on a turbocharger according to claim 2, characterized in that: The diameter of the outer ring of the center plate (41) on the mounting base (4) is not greater than the diameter of the outer ring of the boss (11) on the fixed base (1).