Internal expansion chuck for oil nozzle machining

Abstract

The utility model relates to the technical field of work fixtures, and discloses an internal expansion chuck for processing an oil nozzle, which comprises a fixture body, an expansion sleeve and a transmission structure, the expansion sleeve penetrates through the fixture body, a cavity for the expansion sleeve to slide up and down is arranged in the middle of the fixture body, a core rod is arranged in the expansion sleeve, the core rod comprises a connecting part, a matching part and a fixing part, and the connecting part is connected with the matching part. The shape of the connecting part corresponds to the shape of an inner hole of an oil nozzle workpiece, the matching part is in sliding fit with the expansion sleeve, the outer side of the fixing part is sleeved with a core rod fixing plate, the core rod fixing plate is fixed to the bottom of the clamp body through a bolt, and the transmission structure penetrates through the core rod fixing plate to abut against the expansion sleeve so as to drive the expansion sleeve to move. The expansion sleeve and the core rod are arranged in a matched mode, the oil nozzle workpiece is arranged on the inner expansion chuck in a sleeved mode, the inner conical face of an oil nozzle ball head is positioned through the connecting part of the core rod, accurate positioning of the circle center and the length of the oil nozzle workpiece is achieved, and therefore the machining position of the outer circle of the oil nozzle is determined, and deviation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically to an internal expansion chuck for oil nozzle processing. Background Technology

[0002] During the manufacturing process of oil nozzles, different processing equipment is required to perform different processes. The existing method for fixing oil nozzles is usually to use a center to hold the inner hole of the oil nozzle workpiece and a tailstock to hold the other end. Although this method can achieve the function of center positioning and holding both ends firmly, the machining position of the outer circle of the oil nozzle can only be determined by manual measurement, which is prone to deviation. Utility Model Content

[0003] The purpose of this invention is to provide an internal expansion chuck for oil nozzle processing, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an internal expansion chuck for oil nozzle processing, comprising a chuck body, an expansion sleeve, and a transmission structure. The expansion sleeve penetrates the chuck body, and the chuck body has a cavity in the middle for the expansion sleeve to slide up and down. A mandrel is provided inside the expansion sleeve. The mandrel includes a connecting part, a mating part, and a fixing part. The shape of the connecting part corresponds to the inner hole shape of the oil nozzle workpiece. The mating part slides with the expansion sleeve, and the outer diameter of the mating part gradually increases from the end of the connecting part to the front end of the fixing part. A mandrel fixing plate is sleeved on the outside of the fixing part. The mandrel fixing plate is fixed to the bottom of the chuck body by bolts. The transmission structure penetrates the mandrel fixing plate and abuts against the expansion sleeve to drive the expansion sleeve to move.

[0005] The following improvements are made in this application: the transmission structure includes a screw connecting plate, on which a plurality of connecting screws are distributed circumferentially, and the connecting screws penetrate the mandrel fixing plate.

[0006] The following improvements are made in this application: a power head connecting plate is sleeved on the outer side of the lower end of the clamping body; a groove that mates with the clamping body is opened in the middle of one end of the power head connecting plate; and a through groove that mates with the screw connecting plate is opened on the power head connecting plate. The through groove communicates with the groove; and a telescopic mechanism is connected to the side of the screw connecting plate opposite to the connecting screw.

[0007] The following improvements are made in this application: the bottom of the power head connecting plate is provided with a connecting hole, the connecting hole extends into the groove, and the core rod fixing plate is provided with a screw hole that matches the connecting hole.

[0008] The following improvements are made in this application: a positioning platform is sleeved on the fixing part, and a column sleeve is provided at the middle of one end of the mandrel fixing plate near the clamping body. A through hole that cooperates with the fixing part is opened in the middle of the column sleeve.

[0009] The following improvement is made in this application: a buffer platform is provided on the outer side of the mandrel fixing plate, and the buffer platform corresponds to and mates with the lower end face of the expansion sleeve. This reduces collision damage between the expansion sleeve and the mandrel fixing plate when the expansion sleeve moves back and forth within the clamping body driven by the transmission structure.

[0010] Compared with the prior art, this utility model provides an internal expansion chuck for oil nozzle processing, which has the following beneficial effects:

[0011] This utility model employs a fitting arrangement between an expansion sleeve and a mandrel. The nozzle workpiece is fitted onto the inner expansion chuck, and the inner conical surface of the nozzle ball head is positioned by the connecting part of the mandrel, achieving precise positioning of the center and length of the nozzle workpiece. This determines the machining position of the nozzle's outer circle, avoiding deviations. Then, the transmission structure drives the expansion sleeve to move towards the chuck body, where it expands through the inclined fitting part on the mandrel, thereby pressing against the inner wall of the nozzle workpiece and fixing the workpiece in place. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the mandrel structure;

[0015] Figure 4 A schematic diagram of the mandrel fixing plate;

[0016] Figure 5 This is a schematic diagram showing the connection between the expansion sleeve and the transmission structure;

[0017] Figure 6 This is a schematic diagram of the power head connecting plate.

[0018] In the diagram: 1. Clamp body; 11. Chamber; 2. Expansion sleeve; 3. Transmission structure; 31. Screw connecting plate; 32. Connecting screw; 4. Mandrel; 41. Connecting part; 42. Mating part; 43. Fixing part; 431. Positioning platform; 5. Mandrel fixing plate; 51. Column sleeve; 511. Through hole; 52. Buffer platform; 6. Power head connecting plate; 61. Groove; 62. Through slot; 63. Connecting hole. Detailed Implementation

[0019] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0020] like Figure 1-3As shown, an internal expansion chuck for oil nozzle processing mainly consists of a clamping body 1, an expansion sleeve 2, and a transmission structure 3. The expansion sleeve 2 penetrates the clamping body 1. The clamping body 1 has a chamber 11 in the middle for the expansion sleeve 2 to slide up and down. A mandrel 4 is provided inside the expansion sleeve 2. The mandrel 4 includes a connecting part 41, a mating part 42, and a fixing part 43. The shape of the connecting part 41 corresponds to the inner hole shape of the oil nozzle workpiece. The mating part 42 slides with the expansion sleeve 2, and the outer diameter of the mating part 42 gradually increases from the end of the connecting part 41 to the front end of the fixing part 43, and has a certain slope.

[0021] like Figure 4 As shown, a mandrel fixing plate 5 is sleeved on the outside of the fixing part 43. The mandrel fixing plate 5 is fixed to the bottom of the clamping body 1 by bolts. A buffer platform 52 is provided on the outside of the mandrel fixing plate 5 and the buffer platform 52 corresponds to and cooperates with the lower end face of the expansion sleeve 2. A positioning platform 431 is sleeved on the fixing part 43. A column sleeve 51 is provided in the middle of the end of the mandrel fixing plate 5 near the clamping body 1. A through hole 511 that cooperates with the fixing part 43 is opened in the middle of the column sleeve 51.

[0022] like Figure 5-6 As shown, the transmission structure 3 penetrates the mandrel fixing plate 5 and abuts against the expansion sleeve 2 to drive the expansion sleeve 2 to move. It mainly includes a screw connecting plate 31, on which three connecting screws 32 are distributed circumferentially. The connecting screws 32 penetrate the mandrel fixing plate 5. A power head connecting plate 6 is sleeved on the outer side of the lower end of the clamping body 1. A groove 61 that matches the clamping body 1 is opened in the middle of one end of the power head connecting plate 6, and a through groove 62 that matches the screw connecting plate 31 is opened on the power head connecting plate 6. The through groove 62 communicates with the groove 61. A telescopic mechanism is connected to the side of the screw connecting plate 31 opposite to the connecting screw 32. The telescopic mechanism adopts a conventional mechanical structure, such as a cylinder. The output rod acts on the screw connecting plate 31, and then drives the expansion sleeve 2 to move back and forth through the connecting screw 32. A connecting hole 63 is opened at the bottom of the power head connecting plate 6, which extends into the groove 61. A screw hole that matches the connecting hole 63 is opened on the mandrel fixing plate 5.

[0023] Working principle: The oil nozzle workpiece is placed on the inner expansion chuck, and the inner conical surface of the oil nozzle ball head is positioned by the connecting part 41 of the mandrel 4 to achieve precise positioning of the center and length of the oil nozzle workpiece; then the transmission structure 3 drives the expansion sleeve 2 to move towards the clamp body 1, and expands through the inclined mating part 42 on the mandrel 4, thereby pressing against the inner hole wall of the oil nozzle workpiece to fix the workpiece.

[0024] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. An internal expansion chuck for oil nozzle processing, characterized in that: The device includes a clamping body (1), an expansion sleeve (2), and a transmission structure (3). The expansion sleeve (2) is disposed through the clamping body (1). The clamping body (1) has a chamber (11) in the middle for the expansion sleeve (2) to slide up and down. The expansion sleeve (2) is provided with a mandrel (4). The mandrel (4) includes a connecting part (41), a mating part (42), and a fixing part (43). The shape of the connecting part (41) corresponds to the inner hole shape of the oil nozzle workpiece. The mating part (42) slides with the expansion sleeve (2), and the outer diameter of the mating part (42) gradually increases from the end of the connecting part (41) to the front end of the fixing part (43). A mandrel fixing plate (5) is sleeved on the outside of the fixing part (43). The mandrel fixing plate (5) is fixed to the bottom of the clamping body (1) by bolts. The transmission structure (3) passes through the mandrel fixing plate (5) and abuts against the expansion sleeve (2) to drive the expansion sleeve (2) to move.

2. The internal expansion chuck for oil nozzle processing according to claim 1, characterized in that: The transmission structure (3) includes a screw connecting plate (31), on which a plurality of connecting screws (32) are distributed circumferentially, and the connecting screws (32) penetrate the mandrel fixing plate (5).

3. The internal expansion chuck for oil nozzle processing according to claim 2, characterized in that: A power head connecting plate (6) is sleeved on the outer side of the lower end of the clamping body (1). A groove (61) that matches the clamping body (1) is opened in the middle of one end of the power head connecting plate (6), and a through groove (62) that matches the screw connecting plate (31) is opened on the power head connecting plate (6). The through groove (62) communicates with the groove (61). A telescopic mechanism is connected to one side of the screw connecting plate (31) opposite to the connecting screw (32).

4. The internal expansion chuck for oil nozzle processing according to claim 3, characterized in that: The bottom of the power head connecting plate (6) is provided with a connecting hole (63), which extends into the groove (61). The core rod fixing plate (5) is provided with a screw hole that matches the connecting hole (63).

5. The internal expansion chuck for oil nozzle processing according to claim 1, characterized in that: The fixing part (43) is fitted with a positioning platform (431), and the core rod fixing plate (5) is provided with a column sleeve (51) at the middle of one end near the clamping body (1). The column sleeve (51) has a through hole (511) in the middle that cooperates with the fixing part (43).

6. The internal expansion chuck for oil nozzle processing according to claim 5, characterized in that: The core rod fixing plate (5) is provided with a buffer platform (52) on the outside of the column sleeve (51), and the buffer platform (52) is correspondingly matched with the lower end face of the expansion sleeve (2).

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