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CN-224223321-U - Positioning fixture for casting turning

CN224223321UCN 224223321 UCN224223321 UCN 224223321UCN-224223321-U

Abstract

The utility model discloses a positioning clamp for turning castings, belongs to the technical field of machining of hydraulic generator castings, and aims to solve the problem that in the prior art, due to the fact that shapes of hydraulic generator castings are different, chucks of the positioning clamp cannot be replaced according to the shapes of the castings, so that fixed chucks can only clamp castings of the matched type, perfect fit with other castings of special shapes is difficult, key parts of the castings cannot be accurately positioned in the clamping process, and positioning deviation frequently occurs. The portable replacement mechanism comprises a base, a mounting mechanism is arranged on the periphery of the upper portion of the base, a fixed mounting frame is fixedly arranged above the base, a limiting fixed sleeve is fixedly arranged in the middle of the upper portion of the fixed mounting frame, a portable replacement mechanism is jointly mounted on the inner portion and the outer portion of the fixed mounting frame, a mounting block is embedded in the middle of the limiting fixed sleeve, a clamping chuck is fixedly arranged above the mounting block, and the portable replacement mechanism comprises a preset guide groove.

Inventors

  • DING XU
  • LI WANPENG
  • LIU XIANJIN

Assignees

  • 营口奥博机械制造有限公司

Dates

Publication Date
20260512
Application Date
20250611

Claims (8)

  1. 1. The utility model provides a positioning fixture of foundry goods turning, includes base (1), its characterized in that, the top periphery of base (1) has divided mounting mechanism (2), and the top of base (1) has set firmly fixed mounting frame (3), the top middle part of fixed mounting frame (3) has set firmly spacing solid cover (4), portable change mechanism (5) are jointly installed to the inside and outside of fixed mounting frame (3), the middle part of spacing solid cover (4) is inlayed and is equipped with dress piece (6), and the top of dress piece (6) has set firmly chuck (7), portable change mechanism (5) are including predetermineeing guide slot (51), and predetermineeing guide slot (51) and divide to locate the top of fixed mounting frame (3), the mid-mounting of fixed mounting frame (3) has linkage clamping subassembly (52), linkage clamping subassembly (52) are including transmission lead screw (524), and spacing subassembly (53) are installed to the one end of transmission lead screw (524).
  2. 2. The positioning fixture for turning castings according to claim 1, wherein the linkage clamping assembly (52) comprises a front lead screw (521), a first conical gear (522) is fixedly arranged on one side of the middle section of the front lead screw (521), second conical gears (523) are meshed on two sides of the first conical gears (522), transmission lead screws (524) are fixedly arranged in the middle of the two second conical gears (523), lead screw sliding sleeves (525) are spirally arranged on two sides of the middle of the front lead screw (521) and on the periphery of one side of each of the two transmission lead screws (524), fixing guide blocks (526) are fixedly arranged on the periphery of the four lead screw sliding sleeves (525), limit posts (527) are fixedly arranged on the inner sides of the upper sections of the four fixing guide blocks (526), and limit grooves (528) are respectively formed in the periphery of the mounting blocks (6).
  3. 3. A positioning fixture for turning castings according to claim 2, wherein said fixed guide blocks (526) are movably guided in engagement with predetermined guide slots (51).
  4. 4. A positioning fixture for turning castings according to claim 2, wherein the top dimension of said limiting posts (527) is matched with the opening dimension of said limiting slots (528).
  5. 5. The positioning fixture for turning castings according to claim 1, characterized in that the limiting assembly (53) comprises a torsion block (531), the torsion block (531) is fixedly arranged at one end of the transmission screw (524), a rotating sleeve (532) is arranged on one section of the periphery of the transmission screw (524), a movable groove (533) is formed in the periphery of the rotating sleeve (532), a threaded guide sleeve (534) is slidably arranged on the periphery of the movable groove (533), and a preset spiral groove (535) is formed in one side of the fixed mounting frame (3).
  6. 6. A positioning fixture for turning castings according to claim 5, wherein said threaded guide sleeve (534) is movably guided in engagement with a movable groove (533) provided in the periphery of the swivel sleeve (532).
  7. 7. The positioning fixture for turning castings according to claim 5, wherein said threaded guide sleeve (534) is in threaded fixed connection with a predetermined screw groove (535).
  8. 8. A positioning fixture for turning castings according to claim 1, wherein said mounting mechanism (2) includes screw mounting grooves (21), and the screw mounting grooves (21) are provided on the upper periphery of the base (1) respectively, and bolt bars (22) are provided in the middle portions of a plurality of said screw mounting grooves (21).

Description

Positioning fixture for casting turning Technical Field The utility model belongs to the technical field of hydraulic generator casting machining, and particularly relates to a positioning fixture for casting turning. Background Hydraulic generator castings are of different shapes, such as runner castings, valve body castings, cylinder castings, and other castings, wherein each casting is of a different type and a positioning fixture is required in the process of turning the casting. The existing positioning fixture on the market is different in shape of castings of the hydraulic generator in the use process, and the chucks of the positioning fixture cannot be replaced according to the different shapes of the castings, so that the fixed chucks can only clamp castings of the matched type, perfect fit with other castings of the special shapes is difficult, and therefore key parts of the castings cannot be accurately positioned in the clamping process, and positioning deviation frequently occurs. Disclosure of utility model (1) Technical problem to be solved Aiming at the defects of the prior art, the utility model aims to provide a positioning clamp for turning castings, which aims to solve the problems that in the prior art, because the shapes of the castings of hydraulic generators are different, a chuck of the positioning clamp cannot be replaced according to the shapes of the castings, so that a fixed chuck can only clamp castings of the adapting type, and the clamping clamp is difficult to perfectly attach castings with other special shapes, so that key parts of the castings cannot be accurately positioned in the clamping process, and positioning deviation frequently occurs. (2) Technical proposal In order to solve the technical problems, the utility model provides the positioning fixture for turning castings, which comprises a base, wherein a mounting mechanism is arranged on the upper periphery of the base, a fixed mounting frame is fixedly arranged above the base, a limiting solid sleeve is fixedly arranged in the middle of the upper part of the fixed mounting frame, a portable replacement mechanism is jointly mounted on the inner part and the outer part of the fixed mounting frame, a mounting block is embedded in the middle of the limiting solid sleeve, a chuck is fixedly arranged above the mounting block, the portable replacement mechanism comprises a preset guide groove, the preset guide groove is arranged above the fixed mounting frame, a linkage clamping assembly is mounted in the middle of the fixed mounting frame and comprises a transmission screw rod, and one end of the transmission screw rod is provided with the limiting assembly. Further, the linkage clamping assembly comprises a positive screw rod and a negative screw rod, a first conical gear is fixedly arranged on one side of the middle section of the positive screw rod, second conical gears are meshed on two sides of the first conical gear, transmission screw rods are fixedly arranged in the middle of the two second conical gears, screw rod sliding sleeves are respectively arranged on two sides of the middle of the positive screw rod and on the periphery of one side of each of the two transmission screw rods, fixing guide blocks are fixedly arranged on the periphery of the four screw rod sliding sleeves, limit columns are fixedly arranged on the inner side of the upper section of each fixing guide block, and limit grooves are respectively formed in the periphery of each mounting block. Furthermore, the fixed guide block is movably connected with the preset guide groove in a guiding way. Furthermore, the top size of the limit post is matched with the opening size of the limit groove. Still further, the spacing subassembly includes turns round the piece, and turns round the piece and set firmly in the one end of transmission lead screw, the commentaries on classics cover is installed to the one section periphery of transmission lead screw, and the periphery of changeing the cover divides and is equipped with the movable groove, the periphery in movable groove is smooth to be equipped with the screw thread and leads dress cover, preset helicoid is seted up to one side of fixed dress frame. Further, the thread guide sleeve is movably connected with a movable groove arranged on the periphery of the rotating sleeve in a guiding way. Furthermore, the thread guide sleeve is fixedly connected with the preset screw groove through threads. Furthermore, the mounting mechanism comprises screw mounting grooves, the screw mounting grooves are respectively arranged on the periphery above the base, and bolt rods are arranged in the middle of the screw mounting grooves in a screw manner. (3) Advantageous effects Compared with the prior art, the utility model has the beneficial effects that: When the special-shaped castings cannot be clamped by the chuck in an adapting mode, a person can manually screw the guide sleeve in advance, the guide sleeve can be s