Aluminum shell processing fixture for CNC horizontal milling additional turntable

Abstract

The utility model discloses an aluminum shell processing fixture for an additional turntable of a numerically controlled horizontal milling machine, which relates to the technical field of numerically controlled horizontal milling machines and comprises a fixture base plate, a fixture main plate, a lateral squeezing mechanism and a cylinder pressing part; the utility model utilizes a fourth rotating disk that can be attached to a numerically controlled horizontal milling machine tool to set a positioning column and a positioning key on the fixture base plate to realize fast loading and unloading positioning of the fixture, and at the same time, a reasonable positioning structure is set, and cylinder clamping is utilized to realize fast clamping of the workpiece with reliable positioning and stability during processing; the workpiece is clamped by the cylinder, and the characteristic of the cylinder always maintaining the clamping force is utilized to ensure that the clamping force of the workpiece is sufficient at any time point during the processing process, and the consistency and accuracy of each clamping is ensured; and when the fixture is changed, it can be quickly and accurately connected to the fourth rotating disk attached to the machine tool, and basically no meter adjustment is required; after actual use detection, the processing cycle of the utility model is within 120 seconds.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled horizontal milling machines, in particular to an aluminum shell processing fixture for a numerically controlled horizontal milling additional turntable. Background Art

[0002] like Figure 8-10 The product workpiece shown is a die-cast aluminum engine housing on a certain type of automobile. The shaded portion in the figure is a surface that needs to be finely machined. In the prior art, the workpiece is machined by fine-machining one surface, loosening the workpiece, reversing it, and then re-clamping it for processing. After completion, the next fine-machining surface is processed. However, such a processing method is time-consuming and labor-intensive, and makes the processing efficiency of the workpiece extremely low, making it difficult to meet the high-efficiency processing requirements for the workpiece. Utility Model Content

[0003] The purpose of the utility model is to provide an aluminum shell processing fixture for a CNC horizontal milling machine with an attached turntable, so as to solve the problem in the prior art proposed in the above background technology that the efficiency of finishing the multiple finishing surfaces of a die-cast aluminum engine part shell on a certain automobile is extremely low one by one, and it is difficult to meet the high-efficiency processing requirements of the workpiece.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an aluminum shell processing fixture for a CNC horizontal milling attached turntable, comprising a fixture bottom plate and a fixture main board positioned and supported by a plurality of precision support columns on its top surface, the bottom surface of the fixture main board is provided with a lateral squeezing mechanism, and the top surface is provided with a cylinder pressing portion; eight precision support columns of the same height are provided on the same circumference on the top surface of the fixture bottom plate by bolts, and the fixture main board is jointly supported and fixed at the top ends thereof by bolts; a plurality of positioning support blocks and a large positioning cylinder provided by bolts are provided on the top surface of the fixture main board, a convex locating surface is provided on the top end of the positioning support block on the left side of the large positioning cylinder, and a convex locating surface which is convex and which is parallel to the convex locating surface is provided on the right side. A lateral clamping mechanism opposite to the positioning surface; the lateral clamping mechanism includes a lateral clamping cylinder arranged upward on the bottom surface of the clamp main board, the piston shaft of the lateral clamping cylinder penetrates the clamp main board and can slide without hindrance, and is connected to a clamping wedge at its top through a clamping connector; the cylinder clamping part includes a gate-shaped cylinder bracket arranged on the top surface of the clamp main board, and a downward clamping cylinder is arranged at the center of its top crossbeam, the piston shaft of the clamping cylinder penetrates the top crossbeam of the cylinder bracket and can slide without hindrance, the end of the piston shaft of the clamping cylinder is connected to a clamping crossbeam through a clamping connector, and a clamping head is respectively arranged at both ends of the bottom surface of the clamping crossbeam through bolts.

[0005] Preferably, a fixture positioning column connected to the fourth rotating disk of the CNC horizontal milling machine is provided at the center of the bottom surface of the fixture base plate, and two downward-protruding protruding positioning keys are symmetrically provided on both sides of the fixture positioning column. The two protruding positioning keys are precisely matched with the T-slot of the fourth-axis rotating disk, and eight fixing bolts connected to the fourth-axis rotating disk are evenly arranged on the outer edge of the fixture base plate near its circumference.

[0006] Preferably, a squeezing slope is provided on the right side of the squeezing wedge block, and a squeezing seat is sleeved on the outer side of the squeezing wedge block. The squeezing seat is provided with a through hole that penetrates transversely on the right side of the squeezing wedge block and has a built-in squeezing head.

[0007] Preferably, the clamping beam and the clamping connector are connected by a round pin.

[0008] Preferably, an anti-rotation guide pin is provided on the clamping beam by means of a bolt, and the top end of the anti-rotation guide pin passes through the top beam of the cylinder bracket.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model utilizes the fourth rotating disk that can be attached to the CNC horizontal milling machine to set positioning columns and positioning keys on the bottom plate of the fixture to realize rapid loading and unloading positioning of the fixture, and at the same time, a reasonable positioning structure is set, and cylinder clamping is utilized to realize rapid clamping of the workpiece, reliable positioning, and stability during processing; the workpiece is clamped by the cylinder, and the characteristic of the cylinder always maintaining the clamping force is utilized to ensure that the clamping force of the workpiece is sufficient at any time point in the processing process, and the consistency and accuracy of each clamping is guaranteed; and when the fixture is changed, it can be connected to the fourth rotating disk attached to the machine tool quickly and accurately, basically without the need for meter adjustment; through actual use detection, the processing cycle of the utility model is within 120 seconds. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the front view of the utility model;

[0012] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0013] Figure 3 for Figure 1 Cross-sectional view of BB and CC;

[0014] Figure 4 It is a top view of the cylinder pressing part;

[0015] Figure 5 for Figure 4 Cross-sectional view of the middle DD;

[0016] Figure 6 This is the main view of the fixture base plate;

[0017] Figure 7 for Figure 6 Sectional view of EE;

[0018] Figure 8 It is the main view of the workpiece;

[0019] Fig. 9 for Figure 8 Schematic diagram of the machining surface of the top view and bottom view;

[0020] Fig.10 for Figure 8 Schematic diagram of the machining surfaces of FF, GG, HH, and II;

[0021] In the figure: clamp base plate -1, clamp positioning column -11, protruding positioning key -12, fixing bolt -13, precision support column -14, clamp main board -2, positioning support block -21, positioning large cylinder -22, protruding positioning surface -23, lateral clamping mechanism -3, lateral clamping cylinder -31, clamping connector -32, clamping wedge block -33, clamping seat -34, clamping head -35, cylinder clamping part -4, cylinder bracket -41, clamping cylinder -42, clamping connector -43, clamping beam -44, clamping head -45, round pin -46, anti-rotation guide pin -47. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution in the embodiments of the present utility model is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Please refer to Figure 1-10 , Figure 1 This is the front view of the utility model; Figure 2 for Figure 1 Sectional view of AA in the middle; Figure 3 for Figure 1 Cross-sectional view of BB and CC; Figure 4 It is a top view of the cylinder pressing part; Figure 5 for Figure 4 Cross-sectional view of the middle DD; Figure 6 This is the main view of the fixture base plate; Figure 7 for Figure 6 Sectional view of EE; Figure 8 It is the main view of the workpiece; Fig. 9 for Figure 8 Schematic diagram of the machining surface of the top view and bottom view; Fig.10 for Figure 8 Schematic diagram of the processing surfaces of FF, GG, HH, and II.

[0024] Reference Figure 8-10The product workpiece is a die-cast aluminum engine housing on a certain type of car, in which the shaded surface is the plane that needs to be finely machined.

[0025] The utility model provides an aluminum shell processing fixture for an additional turntable of a CNC horizontal milling machine, which is used for positioning and clamping the above-mentioned workpiece and the fourth rotating disk of the CNC horizontal milling machine, so as to facilitate processing operations on multiple positions of the workpiece and ensure rapid clamping operations of the workpiece; it includes a fixture base plate 1 that is positioned and connected to the fourth rotating disk of the CNC horizontal milling machine, and a fixture main board 2 is positioned and supported on the top surface of the fixture base plate 1 by multiple precision support columns, a lateral clamping mechanism 3 is arranged on the bottom surface of the fixture main board 2, and a cylinder clamping part 4 is arranged on the top surface, which jointly position, clamp and fix the workpiece.

[0026] A fixture positioning column 11 is arranged at the center of the bottom surface of the fixture base plate 1, which is used to precisely match with the rotating center hole of the fourth rotating disk of the CNC horizontal milling machine to accurately locate the center of the fourth rotating disk, and two downward-convex protruding positioning keys 12 are symmetrically arranged on the bottom surface of the fixture positioning column 11 on its transverse diameter and with its circle center, and the protruding positioning keys 12 are precisely matched with the T-slots arranged on the fourth axis rotating disk to achieve precise circumferential positioning; eight fixing bolts 13 are evenly arranged at the outer edge of the circumference of the fixture base plate 1, which are used to fix the fixture base plate 1 to the fourth rotating disk of the CNC horizontal milling machine, so as to resist disturbance during processing; eight precision support columns 14 of the same height are arranged on the top surface of the fixture base plate 1 on the same circumference by bolts, and the top ends of the eight precision support columns 14 are jointly supported and fixed with the fixture main board 2 by bolts.

[0027] The top surface of the clamp main board 2 is supported on the large bottom plane of the workpiece that has been processed by multiple positioning support blocks 21, and this is used as a processing reference in the height direction of the workpiece; a large positioning cylinder 22 is fixedly provided on the top surface of the clamp main board 2 by bolts, and an upward convex convex positioning surface 23 is provided on the top of the positioning support block 21 on the left side of the large positioning cylinder 22, and the convex positioning surface 23 is used in coordination with the large positioning cylinder 22 to limit the rotation of the workpiece; a lateral clamping mechanism 3 is provided on the right side of the large positioning cylinder 22 in the opposite direction of the convex positioning surface 23, so as to overcome the disturbance of the processing force and prevent the workpiece from rotating during the processing.

[0028] The lateral clamping mechanism 3 includes a lateral clamping cylinder 31 which is arranged on the bottom surface of the clamp main board 2 and faces upward. The piston shaft of the lateral clamping cylinder 31 passes through the clamp main board 2 and can slide without hindrance. The top end of the piston shaft of the lateral clamping cylinder 31 is connected to a clamping wedge 33 through a clamping connector 32. A clamping inclined surface is arranged on the right side of the clamping wedge 33. At the same time, a clamping seat 34 is sleeved on the outer side of the clamping wedge 33. The clamping seat 34 is provided with a through hole which passes through the right side of the clamping wedge 33 and has a clamping head 35 built in. When clamping is required, the lateral clamping cylinder 31 pushes the clamping wedge 33 upward. As the clamping wedge 33 gradually rises, its clamping inclined surface gradually pushes the clamping head 35 to the right, so that the raised positioning surface 23 and the clamping head 35 cooperate to clamp and fix the workpiece.

[0029] The purpose of the cylinder clamping part 4 is that during the processing of the workpiece, the positioning surface of the workpiece is against the positioning surface of the fixture main board and a certain clamping force is always maintained; it includes a gate-shaped cylinder bracket 41 arranged on the top surface of the fixture main board 2, and a downward clamping cylinder 42 is arranged at the center of the top crossbeam of the cylinder bracket 41. The piston shaft of the clamping cylinder 42 passes through the top crossbeam of the cylinder bracket 41 and can slide without hindrance. The end of the piston shaft of the clamping cylinder 42 is connected to a clamping crossbeam 44 through a clamping connector 43. A clamping head 45 is respectively provided at both ends of the bottom surface of the clamping crossbeam 44 through bolts. The two clamping heads 45 are clamped on the workpiece at the same time, so that the workpiece can be clamped and fixed, which is convenient for processing multiple surfaces of the workpiece.

[0030] Since the workpiece itself is relatively rigid, a cylinder is set up for two-point clamping. In order to evenly stress the two points, a clamping beam 44 is set up to connect the clamping connector 43 with a round pin 46, so that the clamping beam 44 can float, so that the two clamping points are evenly stressed at the same time.

[0031] In addition, in order to prevent the piston shaft of the clamping cylinder 42 from rotating during the clamping process, which would cause the pressure head to fail to press to the desired position, an anti-rotation guide pin 47 is provided on the clamping beam 44 through a bolt, and the top end of the anti-rotation guide pin 47 passes through the top beam of the cylinder bracket 41, thereby preventing the clamping beam 44 from rotating, thereby affecting the clamping of the workpiece.

[0032] When in use, after the CNC horizontal milling machine has completed processing and the tool has moved back to a safe distance, the solenoid valve is driven by the machine tool control system to pass compressed air into the clamping cylinder, so that the piston rod of the clamping cylinder moves upward, and then the clamping crossbeam is driven upward through the connecting head, disengaged from the workpiece at the clamping point and lifted a certain distance, so that the workpiece can be taken out; at the same time, the lateral clamping structure must be loosened at the same time, and compressed air is introduced into the lateral clamping cylinder, and the piston rod of the lateral clamping cylinder moves downward, driving the clamping wedge downward through the connecting head, and disengaging from the clamping head at the clamping inclined surface; at this time, the workpiece will not have any force to prevent it from rotating around the large positioning cylinder, and if the downward clamping force above is completely released, the workpiece can be taken out, and the processed workpiece can be removed from the positioning support block by hand and removed from the fixture.

[0033] Then, take an unprocessed workpiece, place it on the positioning support block, and then drive the solenoid valve through the control system of the machine tool to pass compressed air into the lateral squeezing cylinder and the clamping cylinder, the cylinder piston rod of the clamping cylinder moves downward, and drives the clamping crossbeam downward through the connecting head to contact the workpiece at the clamping point; at the same time, the piston rod of the lateral squeezing cylinder moves upward, drives the squeezing wedge upward through the connecting head, and contacts the squeezing head at the squeezing inclined surface; at this time, the workpiece will have a squeezing force to prevent it from rotating around the large positioning cylinder, and the CNC horizontal milling machine starts a new processing operation.

[0034] When machining on a CNC horizontal milling machine, the fourth axis rotary disc has a servo motor and encoder, and is uniformly controlled by the CNC system of the CNC machine tool. Figure 8-10 When finishing a part shown in the figure, the part's normal phase is rotated to be parallel to the tool's rotation axis through the CNC program. The CNC system controls the tool to move to the corresponding coordinate position, and accurate processing can be performed.

[0035] The utility model utilizes the fourth rotating disk that can be attached to the CNC horizontal milling machine to set positioning columns and positioning keys on the bottom plate of the fixture to realize rapid loading and unloading positioning of the fixture, and at the same time, a reasonable positioning structure is set, and cylinder clamping is utilized to realize rapid clamping of the workpiece, reliable positioning, and stability during processing; the workpiece is clamped by the cylinder, and the characteristic of the cylinder always maintaining the clamping force is utilized to ensure that the clamping force of the workpiece is sufficient at any time point in the processing process, and the consistency and accuracy of each clamping is guaranteed; and when the fixture is changed, it can be connected to the fourth rotating disk attached to the machine tool quickly and accurately, basically without the need for meter adjustment; through actual use detection, the processing cycle of the utility model is within 120 seconds.

[0036] Although the embodiments of the utility model have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, it can be understood by ordinary technicians in this field that all other embodiments obtained by making various changes, modifications, substitutions and variations to these embodiments without departing from the principle and spirit of the utility model and without making creative work, all belong to the scope of protection of the utility model.

Claims

1. A CNC horizontal milling additional turntable aluminum shell processing fixture, characterized by: The invention comprises a fixture base plate (1) and a fixture main plate (2) which is positioned and supported by a plurality of precision support columns on its top surface, wherein a lateral clamping mechanism (3) is arranged on the bottom surface of the fixture main plate (2), and a cylinder clamping portion (4) is arranged on the top surface; eight precision support columns (14) of the same height are arranged on the top surface of the fixture base plate (1) by bolts on the same circumference, and the fixture main plate (2) is supported and fixed on the top end thereof by bolts; a plurality of positioning support blocks (21) and a large positioning cylinder (22) arranged by bolts are arranged on the top surface of the fixture main plate (2); a convex positioning surface (23) convexly ... A lateral squeezing cylinder (31) is upwardly arranged on the bottom surface of the clamp main board (2), the piston shaft of the lateral squeezing cylinder (31) penetrates the clamp main board (2) and can slide without hindrance, and is connected to a squeezing wedge (33) at its top end through a squeezing connector (32); the cylinder clamping part (4) includes a gate-shaped cylinder bracket (41) arranged on the top surface of the clamp main board (2), and a downward squeezing cylinder (42) is arranged at the center of its top crossbeam, the piston shaft of the squeezing cylinder (42) penetrates the top crossbeam of the cylinder bracket (41) and can slide without hindrance, the end of the piston shaft of the squeezing cylinder (42) is connected to a squeezing crossbeam (44) through a squeezing connector (43), and a squeezing head (45) is respectively arranged at both ends of the bottom surface of the squeezing crossbeam (44) through bolts.

2. The aluminum shell processing fixture for CNC horizontal milling with an attached turntable according to claim 1 is characterized in that: A fixture positioning column (11) is arranged at the center of the bottom surface of the fixture base plate (1) and is positioned and connected to the fourth rotating disk of the CNC horizontal milling machine, and two downwardly protruding positioning keys (12) are symmetrically arranged on both sides of the fixture positioning column (11), and the two protruding positioning keys (12) are precisely matched with the T-slots of the fourth axis rotating disk. Eight fixing bolts (13) connected to the fourth axis rotating disk are evenly arranged on the outer side edge of the fixture base plate (1) near its circumference.

3. The aluminum shell processing fixture for CNC horizontal milling with an additional turntable according to claim 2 is characterized in that: The right side of the squeezing wedge (33) is provided with a squeezing inclined surface, and a squeezing seat (34) is sleeved on the outer side of the squeezing wedge (33). The squeezing seat (34) is provided with a through hole that penetrates transversely on the right side of the squeezing wedge (33) and has a squeezing head (35) built in it.

4. The aluminum shell processing fixture for CNC horizontal milling with an attached turntable according to claim 3 is characterized in that: The clamping crossbeam (44) and the clamping connector (43) are connected by a round pin (46).

5. The aluminum shell processing fixture for CNC horizontal milling with an attached turntable according to claim 4 is characterized in that: An anti-rotation guide pin (47) is provided on the clamping crossbeam (44) by means of bolts, and the top end of the anti-rotation guide pin (47) passes through the top crossbeam of the cylinder bracket (41).

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