Turnover fixture

Abstract

The utility model discloses a turnover type fixing tool, can fix work piece in one time, and realizes centring, can drive work piece multi -angle turnover to realize multi -angle processing while guaranteeing high positioning accuracy, satisfies processing demand. Turnover type fixing tool includes numerical control rotary table, numerical control tailstock, bearing plate, hydraulic clamp and corner oil cylinder, bearing plate is rotationally cooperated between numerical control rotary table and numerical control tailstock, is equipped with at least one mounting hole on bearing plate, is equipped with hydraulic clamp in mounting hole, and both sides are equipped with corner oil cylinder, and corner oil cylinder output end is the presser bar, hydraulic clamp includes clamp body, work piece clamping seat and clamping seat fixed ring, work piece clamping seat is made of elastic material, and is surrounded to form hydraulic oil cavity among three, and work piece clamping seat is equipped with clamping hole, and the ring wall of clamping hole is equipped with support flange, clamp body is equipped with hydraulic channel, and a plurality of hydraulic oil inlet and outlet holes that communicate with hydraulic channel, and hydraulic channel is penetrated to the ring wall of mounting flange to communicate with hydraulic oil cavity.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic clamping technology, and specifically refers to a flip-type fixing fixture. Background Technology

[0002] On machine tools (such as lathes, milling machines, drilling machines, etc.), hydraulic fixtures, including hydraulic chucks and hydraulic collets, are commonly used to hold the workpiece in place and work in conjunction with the machine tool's cutting head to perform machining. Hydraulic fixtures utilize a hydraulic system to clamp or release the workpiece, providing a fast, efficient, and precise way to fix the workpiece for machining.

[0003] The existing fixed tooling has the following problems:

[0004] (1) When the workpiece needs to be processed multiple times and in multiple directions, it is necessary to remove the workpiece, rotate it and re-clamp it. This is troublesome, requires high technical skills from the operators, and has low production efficiency.

[0005] (2) Existing hydraulic clamps, especially hydraulic chucks that externally clamp and fix workpieces, do not have the function of self-centering. They rely solely on the machining accuracy of the jaws and linkages to ensure that each jaw can perform synchronous actions when subjected to hydraulic pressure, so that the clamped workpiece can be positioned on the axis of the clamp. This is difficult to achieve in actual production and will ultimately affect the machining accuracy of the workpiece.

[0006] In summary, existing fixed tooling requires multiple and repeated positioning and clamping operations during production, resulting in low production efficiency, high defect rates after mass production, and an inability to achieve product qualification rates and output. It is especially unsuitable for high-precision manufacturing processes. Utility Model Content

[0007] The main purpose of this utility model is to provide a flip-type fixing fixture to solve the problems existing in the prior art. It can fix the workpiece at one time and achieve centering. While ensuring high positioning accuracy, it can drive the workpiece to flip at multiple angles to achieve multi-angle processing and meet processing requirements.

[0008] To achieve the above objectives, the solution of this utility model is:

[0009] A flip-type fixed fixture includes a CNC rotary table, a CNC tailstock, a support plate, a hydraulic clamp, and a corner cylinder; the support plate is rotatably fitted between the CNC rotary table and the CNC tailstock; the support plate is provided with at least one mounting hole, the hydraulic clamp is disposed in the mounting hole, and the corner cylinder is provided on both sides of the mounting hole, the output end of the corner cylinder being a horizontally rotating pressure rod used to limit the end face of the workpiece; the hydraulic clamp includes a clamp body, a workpiece clamping seat, and a clamping seat fixing ring, the workpiece clamping seat being made of elastic material; the clamp body is provided with a circular hole, the... The sidewall of the circular hole is provided with an annular mounting flange; the workpiece clamping seat and the clamping seat fixing ring are respectively sealed to the upper and lower surfaces of the mounting flange, and the three together form a hydraulic oil cavity. The workpiece clamping seat is provided with a clamping hole for the workpiece to fit in, and the lower end of the annular wall of the clamping hole is provided with an annular support flange for supporting the workpiece; the fixture body is provided with a hydraulic channel and a plurality of hydraulic oil inlet and outlet holes communicating with the hydraulic channel; the hydraulic channel extends through the annular wall of the mounting flange to achieve communication with the hydraulic oil cavity; the hydraulic oil inlet and outlet holes are used to connect to the hydraulic oil supply equipment of the machine tool.

[0010] The clamp body is also provided with several bolt holes that communicate with the hydraulic channel, and an adjusting bolt is threaded into each bolt hole.

[0011] The inner diameter of the clamping seat fixing ring is smaller than the inner diameter of the mounting flange. The workpiece clamping seat is fitted on the upper surface of the clamping seat fixing ring, and the lower end circumferential surface of the workpiece clamping seat is threadedly connected to the clamping seat fixing ring. Sealing rings for end face sealing are provided between the workpiece clamping seat and the mounting flange, between the workpiece clamping seat and the clamping seat fixing ring, and between the clamping seat fixing ring and the mounting flange.

[0012] The clamp body is provided with several connecting holes, which are used to fix the clamp body to the bearing plate with bolts.

[0013] The outer peripheral surface of the workpiece clamping seat is recessed to form a groove, and the groove is covered by the mounting flange and the clamping seat fixing ring to form the hydraulic oil cavity; the bottom wall of the groove protrudes to form a step, and the upper and lower sides of the step are inclined surfaces.

[0014] The bearing plate is provided with two mounting holes on the left and right. There are two hydraulic clamps and three corner cylinders. The hydraulic clamps are set between two adjacent corner cylinders on the left and right. The output shaft of the corner cylinder is connected to the middle position of the pressure rod.

[0015] Both ends of the pressure rod are chamfered.

[0016] The aforementioned flip-type fixed fixture also includes an oil circuit distributor and a centering cylinder; the support plate is provided with an installation groove, the bottom of the installation groove is provided with a connecting oil circuit, and the connecting oil circuit is connected to the hydraulic oil inlet and outlet; the centering cylinder is installed in the installation groove, and its output end is provided with a piston that telescopically engages in the connecting oil circuit; the oil circuit distributor is connected to the centering cylinder.

[0017] Preferably, the support plate is provided with a plurality of transfer oil circuits; the oil circuit distributor is installed on the CNC rotary table, and the pipeline at its connection end passes through the CNC rotary table and is connected to the transfer oil circuits.

[0018] After adopting the above technical solution, the present invention has the following technical effects:

[0019] (1) This utility model can use the workpiece clamping seat of the hydraulic fixture to clamp and fix the circumferential surface of the workpiece, and the supporting flange and pressure rod respectively limit the two end faces of the workpiece. In addition, the CNC turntable drives the carrier plate to achieve angle adjustment, which can drive the workpiece to rotate at multiple angles to achieve multi-angle processing and meet processing requirements. At the same time, since the workpiece can be rotated on the same tooling, it can save additional equipment costs, reduce equipment investment, and then cooperate with robots to achieve highly automated production and reduce the labor intensity of personnel.

[0020] (2) The present invention uses elastic material to make the workpiece clamping seat of the hydraulic clamp. After the clamp body, the workpiece clamping seat and the clamping seat fixing ring are assembled, the three form a closed hydraulic oil chamber. In the automatic state, the hydraulic oil supply equipment of the machine tool inputs or sucks out the hydraulic oil chamber, so that the workpiece clamping seat generates tension deformation to complete the clamping or loosening action of the workpiece.

[0021] (3) This utility model mainly utilizes the tension deformation of the workpiece clamping seat to clamp and fix the workpiece on the circumference. Since the hydraulic oil cavity formed at the circular hole is also circular, when the hydraulic pressure changes, it can be synchronously distributed to all parts of the circumference of the clamping hole of the workpiece clamping seat to achieve synchronous deformation. In addition, it can automatically position the workpiece to the axis of the fixture without manual adjustment, which can meet the needs of high-precision processing. Attached Figure Description

[0022] Figure 1 This is a perspective view of a specific embodiment of the present utility model.

[0023] Figure 2 This is a front view of a specific embodiment of the present utility model.

[0024] Figure 3 This is an exploded view of a specific embodiment of the present utility model.

[0025] Figure 4This is a cross-sectional view of a specific embodiment of the present utility model.

[0026] Figure 5 This is a cross-sectional view of the support plate according to a specific embodiment of the present utility model.

[0027] Figure 6 This is a perspective view of a hydraulic clamp according to a specific embodiment of the present utility model.

[0028] Figure 7 This is an exploded view of the hydraulic clamp according to a specific embodiment of the present invention.

[0029] Figure 8 This is a cross-sectional view of a hydraulic clamp according to a specific embodiment of the present utility model.

[0030] Explanation of icon numbers:

[0031] 1-CNC rotary table;

[0032] 2-CNC tailstock;

[0033] 3-Bearing plate; 31-Mounting hole; 32-Mounting groove; 33-Connecting oil passage; 34-Transfer oil passage;

[0034] 4-Hydraulic clamp; 40-Hydraulic oil chamber; 41-Clamp body; 411-Round hole; 412-Mounting flange; 413-Hydraulic channel; 414-Hydraulic oil inlet / outlet; 415-Bolt hole; 416-Connecting hole; 42-Workpiece clamping seat; 421-Clamping hole; 422-Support flange; 423-Groove; 424-Step; 425-Ceiling surface; 43-Clamping seat retaining ring; 44-Adjusting bolt; 45-Sealing ring;

[0035] 5-Corner cylinder; 51-Pressure rod; 511-Chamfer;

[0036] 6-Energy distributor;

[0037] 7-Centering cylinder; 71-Piston;

[0038] a-Workpiece. Detailed Implementation

[0039] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0040] refer to Figures 1-8 As shown, this utility model discloses a flip-type fixed fixture, including a CNC turntable 1, a CNC tailstock 2, a bearing plate 3, a hydraulic clamp 4, and a corner cylinder 5;

[0041] The bearing plate 3 is rotatably fitted between the CNC rotary table 1 and the CNC tailstock 2, and is driven by the CNC rotary table 1 to achieve rotational motion around the horizontal axis;

[0042] The bearing plate 3 is provided with at least one mounting hole 31, and a hydraulic clamp 4 is provided in the mounting hole 31. An angle cylinder 5 is provided on both sides of the mounting hole 31. The output end of the angle cylinder 5 is a horizontally rotating pressure rod 51, which is used to limit the end face of the workpiece a.

[0043] refer to Figures 6-8 As shown, the hydraulic clamp 4 includes a clamp body 41, a workpiece clamping seat 42, and a clamping seat fixing ring 43. The workpiece clamping seat 42 is made of elastic material. The clamp body 41 is provided with a circular hole 411, and the side wall of the circular hole 411 is provided with an annular mounting flange 412. The workpiece clamping seat 42 and the clamping seat fixing ring 43 are respectively sealed to the upper and lower surfaces of the mounting flange 412, and the three together form a hydraulic oil cavity 40. The workpiece clamping seat 42 is provided with a clamping hole 421 for workpiece a to mate with. The lower end of the annular wall of the clamping hole 421 is provided with an annular support flange 422 for supporting workpiece a. The clamp body 41 is provided with a hydraulic channel 413 and a plurality of hydraulic oil inlet and outlet holes 414 communicating with the hydraulic channel 413. The hydraulic channel 413 extends through the annular wall of the mounting flange 412 to achieve communication with the hydraulic oil cavity 40. The hydraulic oil inlet and outlet holes 414 are used to connect the hydraulic oil supply equipment of the machine tool, such as a standard hydraulic station.

[0044] Through the above solution, this utility model has the following technical effects:

[0045] (1) This utility model can use the workpiece clamping seat 43 of the hydraulic fixture 4 to clamp and fix the circumferential surface of the workpiece a, and the support flange 422 and the pressure rod 511 respectively limit the two end faces of the workpiece a. In addition, the CNC turntable 1 drives the bearing plate 3 to achieve angle adjustment, which can drive the workpiece a to rotate at multiple angles to achieve multi-angle processing and meet the processing requirements. At the same time, since the workpiece a can be rotated on the same tooling, it can save additional equipment costs, reduce equipment investment, and then cooperate with robots to achieve highly automated production and reduce the labor intensity of personnel.

[0046] (2) The workpiece clamping seat 42 of the hydraulic clamp 4 is made of elastic material. When the clamp body 41, the workpiece clamping seat 42 and the clamping seat fixing ring 43 are assembled, the three form a closed hydraulic oil chamber 40. In automatic mode, the hydraulic oil supply equipment of the machine tool inputs or sucks out the hydraulic oil chamber 40, so that the workpiece clamping seat 42 generates tension deformation to complete the clamping or loosening action of the workpiece.

[0047] (3) This utility model mainly utilizes the tension deformation of the workpiece clamping seat 42 to clamp and fix the workpiece on the circumference. Since the hydraulic oil chamber 40 formed at the circular hole 411 is also in the shape of a ring, when the hydraulic pressure changes, it can be synchronously moved to all parts of the circumference of the clamping hole 421 of the workpiece clamping seat 42 to achieve synchronous deformation. In addition, it can automatically position the workpiece to the axis of the fixture without manual adjustment, which can meet the needs of high-precision processing.

[0048] The following are specific embodiments of the present invention.

[0049] The aforementioned fixture body 41 is also provided with several bolt holes 415 communicating with the hydraulic channel 413, and each bolt hole 415 is threadedly fitted with an adjusting bolt 44. Thus, this utility model can realize manual adjustment of the hydraulic pressure in the hydraulic oil chamber 40, so that the machine tool has both automatic and manual adjustment modes: in manual mode, provided that the bolts in the other bolt holes 415 are fixed or blocked by other parts, the clamping and loosening actions of the workpiece clamping seat 42 can be switched manually by turning one of the adjusting bolts 44.

[0050] The inner diameter of the aforementioned clamping seat fixing ring 43 is smaller than the inner diameter of the mounting flange 412. The workpiece clamping seat 42 fits on the upper surface of the clamping seat fixing ring 43, and the lower circumferential surface of the workpiece clamping seat 42 is threadedly connected to the clamping seat fixing ring 43. Sealing rings 45 for end-face sealing are provided between the workpiece clamping seat 42 and the mounting flange 412, between the workpiece clamping seat 42 and the clamping seat fixing ring 43, and between the clamping seat fixing ring 43 and the mounting flange 412. In this embodiment, the aforementioned workpiece clamping seat 42 and clamping seat fixing ring 43 can be installed on the mounting flange 412 by screw locking to achieve relative fixation, and the sealing ring 45 is used to seal the hydraulic oil chamber 40. Therefore, this utility model utilizes Pascal's law, abandoning the existing welding sealing method, and innovatively adopts mechanical connection of various components and cooperation with the sealing ring 45 to achieve sealing. By adjusting the hydraulic pressure through the hydraulic oil supply equipment or adjusting bolt 44, the force can be output to achieve clamping or releasing of the workpiece.

[0051] The elastic material of the workpiece clamping seat 42 can be rubber or the like, which can produce a certain deformation when subjected to hydraulic pressure.

[0052] The aforementioned clamp body 41 is provided with a plurality of connecting holes 416, which are used to fix the clamp body 41 to the bearing plate 3 with bolts.

[0053] The outer peripheral surface of the aforementioned workpiece clamping seat 42 is recessed to form a groove 423. After the groove 423 is covered by the mounting flange 412 and the clamping seat fixing ring 43, it forms the aforementioned hydraulic oil cavity 40. The bottom wall of the groove 423 protrudes to form a step 424, and the upper and lower sides of the step 424 are inclined surfaces 425. Thus, when the hydraulic pressure in the hydraulic oil cavity 40 changes, the pressure acts on the step 424 from the upper and lower sides, causing the annular wall of the clamping hole 421 corresponding to the step 424 to be subjected to a greater force and to contract radially, providing a greater clamping force.

[0054] In this embodiment, the bearing plate 3 is provided with two mounting holes 31, meaning there are two hydraulic clamps 4 and three corner cylinders 5. The hydraulic clamps 4 are positioned between two adjacent corner cylinders 5, and the output shaft of the corner cylinder 5 is connected to the middle position of the pressure rod 51. Thus, the pressure rod 51 of the corner cylinder 5 located between the two hydraulic clamps 4 can simultaneously limit the workpieces a on both sides.

[0055] Both ends of the aforementioned pressure rod 51 are provided with chamfers 511, which serve to smooth the transition and reduce wear on the workpiece when in contact with the workpiece a.

[0056] This utility model also includes an oil circuit distributor 6 and a centering cylinder 7; a mounting groove 32 is provided on the support plate 3, and a connecting oil circuit 33 is provided at the bottom of the mounting groove 32, which is connected to the hydraulic oil inlet and outlet hole 414; the centering cylinder 7 is installed in the mounting groove 32, and a piston 71 that telescopically cooperates with the connecting oil circuit 33 is provided at its output end; the oil circuit distributor 6 is connected to the centering cylinder 7.

[0057] Furthermore, the aforementioned support plate 3 is provided with several transfer oil passages 34; the oil passage distributor 6 is installed on the CNC rotary table 1, and the pipeline at its connection end passes through the CNC rotary table 1 and connects to the transfer oil passages 34. Thus, most of the oil passages of this utility model are set inside the CNC rotary table 1 and the support plate 3, avoiding the pipes from being exposed and facilitating the cleaning of debris on the support plate during the production process.

[0058] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A flip-type fixing fixture, characterized in that: Includes CNC rotary table, CNC tailstock, bearing plate, hydraulic fixture and corner cylinder; The bearing plate is rotatably fitted between the CNC rotary table and the CNC tailstock; The bearing plate is provided with at least one mounting hole, the hydraulic clamp is provided in the mounting hole, and the corner cylinder is provided on both sides of the mounting hole. The output end of the corner cylinder is a horizontally rotating pressure rod used to limit the end face of the workpiece. The hydraulic clamp includes a clamp body, a workpiece clamping seat, and a clamping seat fixing ring. The workpiece clamping seat is made of an elastic material. The clamp body has a circular hole, and the side wall of the circular hole has an annular mounting flange. The workpiece clamping seat and the clamping seat fixing ring are respectively sealed to the upper and lower surfaces of the mounting flange, and the three together form a hydraulic oil cavity. The workpiece clamping seat has a clamping hole for the workpiece to fit in, and the lower end of the annular wall of the clamping hole has an annular support flange for supporting the workpiece. The clamp body has a hydraulic channel and a plurality of hydraulic oil inlet and outlet holes communicating with the hydraulic channel. The hydraulic channel extends through the annular wall of the mounting flange to communicate with the hydraulic oil cavity. The hydraulic oil inlet and outlet holes are used to connect to the hydraulic oil supply equipment of the machine tool.

2. The flip-type fixing fixture as described in claim 1, characterized in that: The clamp body is also provided with several bolt holes that communicate with the hydraulic channel, and an adjusting bolt is threaded into each bolt hole.

3. The flip-type fixing fixture as described in claim 1, characterized in that: The inner diameter of the clamping seat fixing ring is smaller than the inner diameter of the mounting flange. The workpiece clamping seat is fitted on the upper surface of the clamping seat fixing ring, and the lower end circumferential surface of the workpiece clamping seat is threadedly connected to the clamping seat fixing ring. Sealing rings for end face sealing are provided between the workpiece clamping seat and the mounting flange, between the workpiece clamping seat and the clamping seat fixing ring, and between the clamping seat fixing ring and the mounting flange.

4. The flip-type fixing fixture as described in claim 1, characterized in that: The clamp body is provided with several connecting holes, which are used to fix the clamp body to the bearing plate with bolts.

5. The flip-type fixing fixture as described in claim 1, characterized in that: The outer peripheral surface of the workpiece clamping seat is recessed to form a groove, and the groove is covered by the mounting flange and the clamping seat fixing ring to form the hydraulic oil cavity; the bottom wall of the groove protrudes to form a step, and the upper and lower sides of the step are inclined surfaces.

6. The flip-type fixing fixture as described in claim 1, characterized in that: The bearing plate is provided with two mounting holes on the left and right. There are two hydraulic clamps and three corner cylinders. The hydraulic clamps are set between two adjacent corner cylinders on the left and right. The output shaft of the corner cylinder is connected to the middle position of the pressure rod.

7. The flip-type fixing fixture as described in claim 1, characterized in that: Both ends of the pressure rod are chamfered.

8. The flip-type fixing fixture as described in claim 1, characterized in that: It also includes an oil circuit distributor and a centering cylinder; the support plate is provided with an installation groove, the bottom of the installation groove is provided with a connecting oil circuit, and the connecting oil circuit is connected to the hydraulic oil inlet and outlet; the centering cylinder is installed in the installation groove, and its output end is provided with a piston that telescopically cooperates in the connecting oil circuit; the oil circuit distributor is connected to the centering cylinder.

9. The flip-type fixing fixture as described in claim 8, characterized in that: The support plate is provided with several transfer oil circuits; the oil circuit distributor is installed on the CNC rotary table, and the pipeline at its connection end passes through the CNC rotary table and is connected to the transfer oil circuits.

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