CN204430318U - Shape tube joint location frock - Google Patents

Abstract

This patent discloses a special-shaped pipe joint positioning tool for fast and stable positioning of workpieces. There is a vertical through hole in the clamp body, and the main shaft is slidably connected in the through hole. The upper end of the main shaft is detachably connected with a horizontally protruding jaw through a pin. The lower part of the clamping part of the jaw is provided with a working tool for carrying the bottom of the workpiece. There is a protruding bolt head on the workbench for positioning the hole on the workpiece. There is a gap on the outer periphery of the middle part of the main shaft. The end of the shaft is connected with a cam and is located in the notch, the rotation of the cam pushes the lower surface of the notch, and a spring driving it to release the workpiece is connected between the lower section of the main shaft and the clamp body. The device is easy to operate and stable in clamping. The main shaft can move axially or rotate, which has better flexibility.

Description

Special-shaped pipe joint positioning tool

technical field

The utility model relates to a special-shaped pipe joint positioning tool.

Background technique

The concept of special-shaped steel pipe, rectangular pipe, square pipe sharp corner: special-shaped steel pipe, rectangular pipe, square pipe The traditional welded stainless steel square rectangular pipe is usually produced with a Turkish head roll and several square rectangular rolls. The production mainly depends on flat roll rolling and shaping. Since the flat roll is a two-roll structure, there are problems of unequal roll gaps at the four corners of the square and rectangular tubes and inconsistent force states at the corners, resulting in inconsistencies in the four corners of the square and rectangular tubes. Points vary, R=1.2t, the rectangular tube ruler is the radius of the outer fillet, and f is the wall thickness. Although it meets the relevant enterprise standards, it cannot meet the user's high-quality requirements for products. The new design adopts the four-roller rolling shape of the Turkish head. Because the four-roller structure on the Turkish head is the same, the roll gaps at the four corners are equal, and the corners are in the same stress state. When the rolling force is large enough, the corners will produce plasticity. The deformation causes the metal to fill the corners, and the outer surface of the tube forms the intersection between the flat and curved surfaces.

In the hydraulic system of the vehicle, there are many special-shaped tubular workpieces. Due to the high requirements on the center distance, the conventional turning fixtures often cannot meet the requirements, and the most common fixtures are used to replace the connecting plate on the lathe spindle and three Jaw chuck, re-make the face plate, after the face plate is connected with the main shaft, then install the other designed car fixture on the face plate through interference fit and bolt connection. The shortcoming of this scheme is: 1, the production cycle is long. 2. Repeated disassembly and installation of the spindle connection plate will reduce the dimensional accuracy of the spindle and connection plate, and affect the machining accuracy of subsequent conventional shaft workpieces. 3. Due to the different models of machine tools, the interface types and sizes of the spindle and connecting discs will be different, resulting in different structural sizes and types of faceplates. Therefore, how to overcome the shortcomings of the above fixtures and improve production efficiency is a problem that needs to be solved urgently in the production of special-shaped pipe joints in this industry.

Utility model content

The utility model intends to provide a special-shaped pipe joint positioning tool to quickly and stably position workpieces.

The special-shaped pipe joint positioning tool in this scheme includes a clamp body, which is provided with a vertical through hole, and a main shaft is slidably connected to the through hole, and the upper end of the main shaft is detachably connected with a horizontally protruding jaw through a pin. Below the clamping part of the claw is a workbench for carrying the bottom of the workpiece. The workbench is provided with a protruding bolt head for positioning the hole on the workpiece. There is a gap on the outer periphery of the middle part of the spindle. The drive shaft in the horizontal direction is connected with a rotary cylinder, the end of the drive shaft is connected with a cam and is located in the gap, the rotation of the cam pushes the lower surface of the gap, and the lower section of the main shaft is connected with the clamp body There are springs that drive it to release the workpiece.

The device uses a rotating cylinder as the original moving part, which can generate a large clamping force. The rotating cylinder drives the driving rod to rotate, and the cam on the driving rod pushes the lower surface of the notch of the main shaft, so that the main shaft moves downward against the elastic force of the spring, and then the jaws on the top of the main shaft can be pressed down to clamp the workpiece. The device is easy to operate , stable clamping. The main shaft can move axially or rotate, which has better flexibility.

Further, the cam is a circular wheel eccentrically coupled to the end face of the drive shaft. Installation and maintenance are more convenient.

Further, the driving end of the jaw is provided with a round hole and sleeved on the top of the main shaft, and its relative position is fixed by a pin.

Further, the spring is a compression spring.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Detailed ways

The utility model is described in further detail below by means of specific embodiments:

The reference signs in the drawings of the description include: clamp body 1, main shaft 2, jaw 3, workpiece 4, bolt head 5, drive shaft 6, cam 7, notch 8 of the main shaft, and spring 9.

The embodiment is basically shown in Figure 1: the device uses a rotating cylinder as a driving element, which can generate a large clamping force. The main body of the chuck body is a vertical tubular body, in which there is a vertical hole, and a main shaft is slidably connected to the hole. The main shaft can rotate or move axially. The left driving end has a round hole and is sleeved on the top of the main shaft, and a horizontal pin penetrates the two to fix their relative positions. A workbench for carrying the bottom of the workpiece is provided under the clamping part on the right side of the jaws, and a protruding bolt head is provided on the workbench for positioning the holes on the workpiece.

There is a notch on the outer circumference of the middle part of the main shaft, and the upper and lower sides of the notch are planes. The clamp body is connected with a horizontal drive shaft for rotation. The drive shaft is connected with a rotary cylinder not shown in the figure, and the end of the drive shaft is connected with a cam. The cam is a circular wheel eccentrically coupled to the end face of the drive shaft, the height of the cam is less than the height of the notch so as to be placed in the notch, and the rotation of the cam pushes the lower surface of the notch.

The lower section of the main shaft and the clamp body are connected with a compression spring that drives it to loosen the workpiece. The bottom end of the compression spring is pressed against the base plate of the clamp body, and the top end of the compression spring is supported against the lower surface of the boss below the notch of the main shaft.

The rotating cylinder drives the driving rod to rotate, and the cam on the driving rod pushes the lower surface of the notch of the main shaft, so that the main shaft moves downward against the elastic force of the spring, and then the jaws on the top of the main shaft can be pressed down to clamp the workpiece.

What is described above is only the embodiment of the utility model, and common knowledge such as the specific structure and characteristic known in the scheme is not described too much here. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the utility model, some deformations and improvements can also be made, and these should also be regarded as the protection scope of the utility model, and these will not affect the utility model. Effects of novel implementations and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (4)

1. shape tube joint location frock, comprise clamp body, it is characterized in that, vertical through hole is provided with in clamp body, main shaft has been slidably connected in through hole, the upper end of main shaft is detachably connected with by pin the jaw that level stretches out, the below of jaw clamping part is provided with the workbench for carrying bottom workpiece, workbench is provided with the bolt head of protrusion for the hole on positioning workpieces, the periphery, middle part of main shaft is provided with breach, clamp body rotates the driving shaft being connected with horizontal direction, driving shaft is connected with rotary cylinder, the end of driving shaft is connected with cam and is arranged in described breach, namely the rotation of cam pushes the lower surface of described breach, be connected with between the hypomere of main shaft and clamp body and order about the spring that it unclamps workpiece.

2. shape tube joint location frock according to claim 1, is characterized in that: described cam is the circle wheel that bias is connected in driving shaft end face.

3. shape tube joint location frock according to claim 2, is characterized in that: the drive end of jaw is provided with circular hole and is set in main shaft top, and fixes its relative position by pin.

4. shape tube joint location frock according to claim 3, is characterized in that: described spring is stage clip.