Hydraulic clamp for milling side groove of aluminum piston

Abstract

The utility model provides a hydraulic clamp for milling a side groove of an aluminum piston, relates to the technical field of tool clamps, and aims to solve the technical problem of high reject ratio of broached aluminum pistons in the prior art. A hydraulic clamp for aluminum piston side groove milling comprises a fourth shaft, a tailstock, a bottom plate, a hydraulic assembly, a centering clamp and a clamping jaw assembly, the bottom plate is arranged between the fourth shaft and the tailstock and driven by the fourth shaft to rotate, the centering clamp is connected to the bottom plate, the hydraulic assembly is used for providing hydraulic power for the centering clamp, and the clamping jaw assembly comprises two fixed clamping jaws. The two fixed clamping jaws are connected with the centering clamp and driven by the centering clamp to get close to or get away from each other, and a groove used for clamping an aluminum piston is formed in the end, close to the other fixed clamping jaw, of each fixed clamping jaw. And the aluminum piston is fixed by centering and positioning through a centering clamp and two fixed clamping jaws, the repeated positioning precision is high, and the consistent precision of repeated clamping after the aluminum piston is clamped is met.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically to a hydraulic fixture for milling the side grooves of aluminum pistons. Background Technology

[0002] The air compressor aluminum piston includes a reduced diameter section and two expanded diameter sections. The two expanded diameter sections are located at the upper and lower ends of the reduced diameter section. The cross-sections of both the reduced diameter section and the expanded diameter section are circular. Each expanded diameter section has two annular flanges on its outer peripheral wall. The upper end face of the expanded diameter section has a through hole that penetrates the expanded diameter section. The reduced diameter section has a side groove that penetrates in the radial direction and communicates with the through hole.

[0003] Currently, the processing method for aluminum pistons in air compressors is generally broaching. Due to the limited number of clamping positions available for the parts and the poor positional accuracy after clamping, broaching relies on tool positioning. However, the dimensional accuracy of the parts is quite strict. In traditional broaching processes, it is impossible to guarantee the assembly dimensional tolerance between the side groove position and the product end face, resulting in misalignment of holes during assembly, making assembly impossible and leading to a high defect rate. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a hydraulic fixture for milling the side groove of aluminum pistons, so as to solve the technical problem of high defect rate of aluminum pistons processed by broaching in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a hydraulic fixture for milling the side groove of an aluminum piston, including a four-axis, a tailstock, a base plate, a hydraulic assembly, a centering clamp, and a jaw assembly. The base plate is provided between the four-axis and the tailstock and is driven to rotate by the four-axis. The centering clamp is connected to the base plate. The hydraulic assembly is used to provide hydraulic power to the centering clamp. The jaw assembly includes two fixed jaws. The two fixed jaws are connected to the centering clamp and are driven to move closer or further away from each other by the centering clamp. Each fixed jaw has a groove for clamping the aluminum piston at one end, near the other fixed jaw.

[0006] With the above structure, the hydraulic fixture for milling the side groove of an aluminum piston of this utility model has the following advantages: the four axes and tailstock can drive the centering clamp and jaw assembly on the base plate to rotate ±90 degrees, so that the two ends of the side groove are parallel to the main shaft of the equipment for milling. The aluminum piston is fixed by centering clamp and two fixed jaws for centering and positioning, which has high repeatability and meets the consistent accuracy of repeated clamping after the aluminum piston is clamped. This ensures that the assembly dimension tolerance from the side groove of the aluminum piston to the end face of the product meets the requirements, improves the yield rate, and changes the broaching process to the milling process, which is cheaper and makes it easier to process the smaller radii on the side groove.

[0007] As an improvement, the four-axis and tailstock are respectively connected to a first connecting plate and a second connecting plate, and the base plate is connected to the first connecting plate and the second connecting plate.

[0008] As an improvement, the hydraulic assembly includes a hydraulic station and an oil circuit distributor. The hydraulic station is connected to the oil circuit distributor, which is connected to the four axes. The first connecting plate has a first oil passage that communicates with the oil passage of the oil circuit distributor, and the base plate has a second oil passage that communicates with the first oil passage. The second oil passage communicates with the oil passage of the centering clamp. With this structure, the oil circuit distributor provides oil to the centering clamp through the first and second oil passages, and the hydraulic station provides hydraulic power for the operation of the centering clamp.

[0009] As an improvement, the oil distributor includes a housing and a connecting shaft. The housing is located on the left side of the four shafts, one end of the connecting shaft is rotatably connected inside the housing, and the other end of the connecting shaft passes through the four shafts and is connected to the first connecting plate.

[0010] As an improvement, a connecting block is connected to the left end of the quadcopter, and the upper end of the connecting block is connected to the housing; this structure improves the stability of the connection between the oil distributor and the quadcopter.

[0011] As an improvement, the groove includes a semi-circular groove on the upper end face of the fixed jaws that matches the size of the aluminum piston, and a square groove on the upper end face of the fixed jaws that extends through the fixed jaws in the front-back direction, so that the side groove of the aluminum piston is exposed from the square groove. Both the semi-circular groove and the square groove extend through the fixed jaws and are close to one end of the other fixed jaw. With this structure, the aluminum piston is clamped from both sides in a centered manner through the two semi-circular grooves on the two fixed jaws, making full use of the limited clamping area on the aluminum piston and improving the stability of clamping.

[0012] As an improvement, two centering clamps are connected to the base plate; this structure enables dual-station machining and improves machining efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the connection structure between the four shafts and the oil circuit distributor in this utility model.

[0015] Figure 3 This is a schematic diagram of the gripper assembly in this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the fixed gripper in this utility model.

[0017] Reference numerals: 1. Four-axis; 2. Tailstock; 3. Base plate; 4. Oil circuit distributor; 41. Housing; 42. Connecting shaft; 5. Alignment clamp; 6. Grip assembly; 61. Fixed gripper; 7. Groove; 71. Semi-circular groove; 72. Square groove; 8. First connecting plate; 9. Second connecting plate; 10. Connecting block. Detailed Implementation

[0018] The following is a detailed description of a hydraulic fixture for milling the side grooves of an aluminum piston according to the present invention, with reference to the accompanying drawings.

[0019] like Figures 1 to 4 As shown, a hydraulic fixture for milling the side groove of an aluminum piston includes a four-axis assembly 1, a tailstock 2, a base plate 3, a hydraulic assembly, a centering clamp 5, and a jaw assembly 6. The base plate 3 is located between the four-axis assembly 1 and the tailstock 2, and the four-axis assembly drives the base plate 3 to rotate. Specifically, as shown... Figure 1 As shown, the four-axis 1 and the tailstock 2 are respectively connected to the first connecting plate 8 and the second connecting plate 9. The base plate 3 is connected to the first connecting plate 8 and the second connecting plate 9. The left and right parts of the upper surface of the base plate 3 are respectively connected to the first connecting plate 8 and the second connecting plate 9. The four-axis 1 drives the first connecting plate 8 to rotate, which drives the base plate 3 and the second connecting plate 9 to rotate synchronously, so that the base plate 3 can rotate in ±90° direction.

[0020] like Figure 1 As shown, the centering clamp 5 is connected to the base plate 3. The hydraulic assembly provides hydraulic power to the centering clamp 5. The gripper assembly 6 includes two fixed grippers 61. The two fixed grippers 61 are connected to the centering clamp 5 and are driven by the centering clamp 5 to move closer or further apart. Each fixed gripper 61 has a groove 7 for gripping an aluminum piston at one end near the other. The centering clamp 5 drives the two fixed grippers 61 to grip the aluminum piston, thus fixing the aluminum piston within the two grooves 7. In this embodiment, two centering clamps 5 are connected to the base plate 3, correspondingly, there are two sets of gripper assemblies 6.

[0021] The four-axis 1 and tailstock 2 can drive the centering clamp 5 and jaw assembly 6 on the base plate 3 to rotate ±90 degrees, so that the two ends of the side groove are parallel to the main spindle of the equipment for milling. The aluminum piston is fixed by centering and positioning using the centering clamp 5 and two fixed jaws 6, which has high repeatability accuracy, reaching ±0.01mm. This meets the consistent clamping accuracy after the aluminum piston is clamped, thus ensuring that the assembly dimensional tolerance from the side groove position of the aluminum piston to the end face of the product meets the requirements, improving the yield rate. Moreover, changing the broaching process to milling reduces costs and makes it easier to process the smaller radii on the side groove. The base plate 3 is made of 40Cr alloy steel and heat-treated to a hardness of 45HRC, which has strong load-bearing capacity and is not easily deformed.

[0022] like Figure 4As shown, the groove 7 includes a semi-circular groove 71 on the upper end face of the fixed jaw 61 that matches the size of the aluminum piston, and a square groove 72 on the upper end face of the fixed jaw 61 that penetrates the fixed jaw 61 in the front-rear direction, allowing the side groove of the aluminum piston to protrude from the square groove 72. Both the semi-circular groove 71 and the square groove 72 penetrate the fixed jaw 61 and are close to one end of the other fixed jaw 61. The semi-circular groove 71 is deeper than the square groove 72. Figure 3 The image shows the gripper assembly 6 holding the aluminum piston, with two semi-circular grooves 71 abutting against the outer peripheral wall of the piston's flange from both sides. The fixing gripper 61 is connected to the centering clamp 5 via ratchet teeth.

[0023] like Figure 1 and Figure 2 As shown, the hydraulic assembly includes a hydraulic power unit (not shown) and an oil circuit distributor 4. The hydraulic power unit is connected to the oil circuit distributor 4, which is connected to the four-axis 1. The first connecting plate 8 has a first oil passage communicating with the oil passage of the oil circuit distributor 4, and the base plate 3 has a second oil passage communicating with the first oil passage. The second oil passage communicates with the oil passage of the centering clamp 5. The hydraulic power unit is a two-circuit hydraulic power unit with a maximum operating pressure of 6.0 MPa. The pressure of each circuit is adjustable and equipped with a pressure regulating valve with a pressure display. It is controlled by the auxiliary M-code command of the machining center equipment to realize the oil inlet and outlet, providing hydraulic power for the operation of the centering clamp 5.

[0024] like Figure 2 As shown, the oil circuit distributor 4 includes a housing 41 and a connecting shaft 42. The housing 41 is located on the left side of the four-axis 1. One end of the connecting shaft 42 is rotatably connected inside the housing 41, and the other end of the connecting shaft 42 passes through the four-axis 1 and is connected to the first connecting plate 8, which can ensure that the oil circuit works normally when the four-axis 1 rotates. The specific structure and working principle of the oil circuit distributor 4 are existing technologies and will not be described in detail here. A connecting block 10 is connected to the left end of the four-axis 1, and the upper end of the connecting block 10 is connected to the housing 41. In this embodiment, the connecting block 10 is L-shaped.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. An aluminum piston side groove milling processing hydraulic clamp characterized by, The utility model relates to a four -axis aluminum piston centering clamp, including four -axis (1), tailstock (2), bottom plate (3), hydraulic assembly, centering clamp (5) and clamping jaw assembly (6), four -axis (1) with bottom plate (3) are equipped with tailstock (2) and are driven bottom plate (3) rotation by four -axis (1), centering clamp (5) is connected on bottom plate (3), hydraulic assembly is used for providing hydraulic power for centering clamp (5), clamping jaw assembly (6) includes two fixed clamping jaw (61), two fixed clamping jaw (61) are connected centering clamp (5) and are driven two fixed clamping jaw (61) by centering clamp (5) and each other close or far away, every fixed clamping jaw (61) and be equipped with the recess (7) for clamping aluminum piston on one end close to another fixed clamping jaw (61).

2. The hydraulic clamp for milling of aluminum piston side slots according to claim 1, characterized in that, The four -axis (1) and tailstock (2) are connected with first connecting plate (8) and second connecting plate (9) respectively, and the bottom plate (3) is connected with the first connecting plate (8) and the second connecting plate (9).

3. The hydraulic clamp for milling of aluminum piston side slots according to claim 2, characterized in that, The hydraulic assembly includes a hydraulic station and an oil path distributor (4), the hydraulic station is connected with the oil path distributor (4), the oil path distributor (4) is connected to the four -axis (1), a first oil channel is arranged in the first connecting plate (8) and communicated with an oil channel of the oil path distributor (4), a second oil channel is arranged in the bottom plate (3) and communicated with the first oil channel, and the second oil channel is communicated with an oil channel of the centering clamp (5).

4. The hydraulic clamp for milling of aluminum piston side slots according to claim 3, characterized in that, The oil path distributor (4) includes a shell (41) and a connecting shaft (42), the shell (41) is arranged on the left side of the four -axis (1), one end of the connecting shaft (42) is rotatably connected in the shell (41), and the other end of the connecting shaft (42) penetrates the four -axis (1) and is connected with the first connecting plate (8).

5. The hydraulic clamp for milling of aluminum piston side slots according to claim 4, characterized in that, The four -axis (1) is connected with a connecting block (10) on the left end, and the connecting block (10) is connected with the shell (41) on the upper end.

6. The hydraulic clamp for milling of aluminum piston side slots according to claim 1, characterized in that, The recess (7) includes a semicircular groove (71) arranged on the upper end face of the fixed clamping jaw (61) and matched with the size of the aluminum piston and a square groove (72) arranged on the upper end face of the fixed clamping jaw (61) and penetrating the fixed clamping jaw (61) along the front and back directions, and the side groove of the aluminum piston is exposed from the square groove (72), and the semicircular groove (71) and the square groove (72) both penetrate one end of the fixed clamping jaw (61) close to the other fixed clamping jaw (61).

7. The hydraulic clamp for milling of aluminum piston side slots according to claim 1, characterized in that, The bottom plate (3) is connected with two centering clamps (5).

Images