A clamping tool for turning a cross head

Abstract

A kind of cross head turning clamping tool, it is related to machining technical field, the clamping tool includes pull rod and clamping flange, the pull rod one end is provided with gap, workpiece hook is rotatably connected in the gap, the pull rod other end is provided with external thread, the clamping flange middle part is provided with central hole, the clamping flange is set in the one end of pull rod external thread, the external thread is threadedly connected with compression nut, the clamping flange includes flange plate, the flange plate one side is equipped with boss, and the other side is equipped with circular table, when clamping, the circular table is in contact with compression nut, the clamping tool of the utility model is used to cross head clamping turning, improve production efficiency, guarantee coaxiality requirement.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a clamping tool for crosshead turning. Background Technology

[0002] The 600 pump crosshead is a key component of the power end of the TWS600 piston pump developed by our company. It is mainly used for guiding. Driven by the connecting rod, the crosshead slides in the guide sleeve of the pump housing, causing the front plunger to reciprocate.

[0003] The threaded hole at the front end of the crosshead and its guide outer circle have strict coaxiality requirements; the optimal machining solution is to complete the machining of the threaded hole and the guide outer circle simultaneously in one clamping. Due to the lack of suitable clamping tools, the workpiece needs to be clamped and machined in two separate clamping operations. This not only increases the clamping and calibration time, but also makes it difficult to guarantee the coaxiality of the threaded hole and the guide outer circle due to calibration accuracy errors. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a clamping tool for crosshead turning, which can solve the technical problems of low working efficiency and inability to guarantee coaxiality requirements of existing clamping tools.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A clamping tool for crosshead turning includes a pull rod and a clamping flange. One end of the pull rod has a notch, and a workpiece hook is rotatably connected to the notch. The other end of the pull rod has an external thread. The clamping flange has a center hole in the middle and is fitted onto one end of the external thread of the pull rod. A clamping nut is threaded onto the external thread. The clamping flange includes a flange plate with a boss on one side and a frustum on the other side. During clamping, the frustum contacts the clamping nut.

[0007] Preferably, the workpiece hook is connected to the pull rod via a pin and a snap ring, and through holes for the pin to pass through are provided in the middle of the workpiece hook and on the wall of the pull rod.

[0008] Preferably, the workpiece hook includes a cylinder, the two sides of which are uniformly and symmetrically milled flat, and both ends of the cylinder are provided with positioning platforms.

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

[0010] 1. This utility model uses a pin and a snap ring to connect the workpiece hook to the pull rod, ensuring that the workpiece hook can rotate freely inside the pull rod, facilitating the swinging installation of the workpiece hook inside the crosshead, and effectively hooking the rough-machined round holes on both sides of the crosshead.

[0011] 2. This utility model provides a clamping flange, in which the boss on the clamping flange matches the process hole at the rear end of the crosshead, ensuring accurate clamping and positioning of the crosshead. The round platform on the clamping flange is used for lathe three-jaw clamping.

[0012] 3. In this utility model, the pull rod passes through the center hole of the clamping flange and is tightened by the threaded engagement of the clamping nut and the pull rod, so that the workpiece hook is tightened to the cross head, ensuring that the cross head is firmly clamped. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is an exploded view of the clamping tool of this utility model;

[0015] Figure 2 This is a schematic diagram showing the connection between the crosshead and the clamping tool of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1-Pull rod, 2-Clamping flange, 21-Flange, 22-Boss, 23-Frustum, 3-Notch, 4-Workpiece hook, 41-Cylinder, 42-Positioning platform, 5-Pressure nut, 6-Pin, 7-Snap ring. Detailed Implementation

[0018] The invention will now be described in detail with reference to the accompanying drawings, by way of example. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments.

[0019] Example

[0020] like Figures 1 to 2As shown, this utility model discloses a clamping tool for crosshead turning. The clamping tool includes a pull rod 1 and a clamping flange 2. One end of the pull rod 1 has a notch 3, and a workpiece hook 4 is rotatably connected to the notch 3. The workpiece hook 4 is connected to the pull rod 1 by a pin 6 and a retaining ring 7. The middle part of the workpiece hook 4 and the rod wall of the pull rod 1 both have through holes for the pin 6 to pass through. By using the pin 6 and the retaining ring 7 to connect the workpiece hook 4 to the pull rod 1, it is ensured that the workpiece hook 4 can rotate freely within the pull rod 1, which facilitates the swinging installation of the workpiece hook 4 inside the crosshead and effectively hooks the rough-machined round holes on both sides of the crosshead. The workpiece hook 4 includes a cylinder 41, and the two sides of the cylinder 41 are uniformly and symmetrically milled flat. Both ends are provided with positioning platforms 42; the other end of the pull rod 1 is provided with an external thread, and the clamping flange 2 has a central hole in the middle. The clamping flange 2 is sleeved on one end of the external thread of the pull rod 1. A clamping nut 5 is threaded onto the external thread. The pull rod 1 passes through the central hole of the clamping flange 2, and is tightened by the clamping nut 5 and the pull rod 1 through the threaded engagement, so that the workpiece hook 4 pulls the crosshead tight, ensuring that the crosshead is firmly clamped; the clamping flange 2 includes a flange 21. One side of the flange 21 is provided with a boss 22, and the other side is provided with a frustum 23. When clamping, the frustum 23 contacts the clamping nut 5. The boss 22 on the clamping flange 2 cooperates with the process hole at the rear end of the crosshead to ensure accurate clamping and positioning of the crosshead. The frustum 23 on the clamping flange 2 is used for lathe three-jaw clamping.

[0021] Working principle: When turning the crosshead, a three-jaw chuck is used to clamp the mounting flange 2, ensuring that the machining of the threaded hole at the front end of the crosshead and the guide outer circle is completed in one clamping. During turning, the lathe spindle drives the mounting flange 2 to rotate, and the mounting flange 2 drives the workpiece hook 4 to rotate the crosshead. The direction of the turning force is consistent with the direction of thread tightening, so the clamping nut 5 will not loosen.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and application concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A clamping tool for crosshead turning, characterized in that: The clamping tool includes a pull rod (1) and a clamping flange (2). One end of the pull rod (1) has a notch (3), and a workpiece hook (4) is rotatably connected in the notch (3). The other end of the pull rod (1) has an external thread. The clamping flange (2) has a central hole in the middle. The clamping flange (2) is fitted onto one end of the external thread of the pull rod (1). A clamping nut (5) is threaded onto the external thread. The clamping flange (2) includes a flange (21). One side of the flange (21) has a boss (22), and the other side has a frustum (23). When clamping, the frustum (23) contacts the clamping nut (5).

2. The clamping tool for crosshead turning as described in claim 1, characterized in that: The workpiece hook (4) is connected to the pull rod (1) by a pin (6) and a snap ring (7). The middle part of the workpiece hook (4) and the rod wall of the pull rod (1) are provided with through holes for the pin (6) to pass through.

3. The clamping tool for crosshead turning as described in claim 1, characterized in that: The workpiece hook (4) includes a cylinder (41), which is uniformly and symmetrically milled on both sides, and a positioning platform (42) is provided at both ends of the cylinder (41).

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