Clamp special for groove milling of push cylinder workpiece for high-speed rail

Abstract

The utility model relates to a special fixture for groove milling of a push cylinder workpiece for a high-speed rail, which comprises a fixture seat body, four rectangular positioning grooves are arranged on the fixture seat body side by side, the bottom surface of each positioning groove is designed to be an arc-shaped bottom surface, a receding groove hole is arranged in the center of each arc-shaped bottom surface, and the width of each positioning groove is set to be right for embedding the push cylinder workpiece; threaded through holes are formed in the positions, right opposite to the centers of the cross sections of the positioning grooves, of the side wall of the lower portion of the clamp base body, and workpiece top plates and puller bolts are arranged in a matched mode. A left pressing mechanism and a right pressing mechanism which are used for pressing the cylinder pushing workpieces in the positioning grooves are arranged between the positioning grooves in the first position and the second position and between the positioning grooves in the third position and the positioning grooves in the fourth position in the left-right sequence. The left end and the right end of the clamp base body are respectively provided with a fixing structure for fixing the clamp base body on a machining platform. According to the utility model, the processing efficiency can be greatly improved, the high-precision process processing requirement can be ensured, and the yield can be improved.

Description

Technical Field

[0001] The utility model relates to a special fixture for milling grooves of a push tube workpiece used in high-speed railways. Background Art

[0002] At present, all parts of my country's high-speed rail locomotives have basically been domestically produced. Many of its parts have special structures involving technical secrets that need to be protected. Therefore, many of its parts need to be processed and produced by different manufacturers in actual processing to complete the processing of different parts and structures of a workpiece.

[0003] The push tube workpiece for high-speed rail locomotives is a non-standard part with a unique structure. When milling the push tube workpiece for high-speed rail locomotives, a special positioning fixture is required to ensure processing accuracy, work efficiency, reduce processing difficulty, and increase production volume. Utility Model Content

[0004] The technical purpose of the utility model is to provide a special fixture for milling grooves of a push tube workpiece for high-speed railways, which can greatly improve the processing efficiency, ensure high-precision process processing requirements and increase production.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:

[0006] A special fixture for milling grooves of a push tube workpiece for high-speed railways comprises a fixture seat body which can be detachably mounted on a working table of a processing machine tool; four rectangular positioning grooves are arranged side by side on the fixture seat body, the bottom surface of the groove is designed to be an arc-shaped bottom surface corresponding to and fitting the push tube workpiece, a clearance slot is opened in the center of the arc-shaped bottom surface, and the width of the positioning groove is set to just fit the push tube workpiece; a threaded through hole is provided on the lower side wall of the fixture seat body facing the center of the cross section of each positioning groove, and a workpiece top plate and a tightening bolt are provided, by which each push tube workpiece to be processed can be tightened and positioned along the axial direction of the positioning groove; left and right sets of clamping mechanisms for clamping the push tube workpiece in each positioning groove are respectively provided between the positioning grooves located at the 1st, 2nd and 3rd, 4th positions in left and right order; fixing structures for fixing the fixture seat body to the processing platform are respectively provided at the left and right ends of the fixture seat body.

[0007] Furthermore, the number of the positioning recesses of the present invention can be more than 4, such as 5 or 6.

[0008] Furthermore, each group of clamping mechanisms described in the utility model is provided with at least one clamping mechanism, and can also be designed to be 2 or more, and each group of clamping machines is evenly arranged.

[0009] Furthermore, the clamping mechanism of the utility model includes symmetrical left and right clamping cross arms, a through hole is provided in the center of the left and right clamping cross arms, and a fixing bolt passing through the through hole is provided. A positioning threaded hole is provided in the middle position of two adjacent positioning grooves on the clamp base body corresponding to the through holes on the left and right clamping cross arms. The arm length of the left and right clamping cross arms is designed to ensure that adjacent push cylinder workpieces can be pressed simultaneously.

[0010] Furthermore, the fixing structure for fixing the clamp base body on the processing platform described in the utility model includes a row of positioning holes and two matching fixing bolts arranged at both ends of the clamp base body. The clamp base body can be firmly fixed on the processing table of the processing machine tool by passing the two fixing bolts through the positioning holes.

[0011] The operation process of the utility model using the above-mentioned special fixture for milling grooves of push cylinder workpieces is: first, the above-mentioned fixture is installed on the workbench of the processing machine tool and fixed; then, the four push cylinder workpieces to be processed are placed in the respective positioning grooves of the fixture, and each push cylinder workpiece is positioned and fixed along the axial direction of the groove with a clamping bolt and a workpiece top plate; then, the push cylinder workpieces in each positioning groove are clamped and fixed with a clamping mechanism; finally, grooves are milled on the push cylinder workpiece according to the processing requirements; after the processing is completed, each completed workpiece is disassembled and replaced with another batch of new workpieces to be processed as described above.

[0012] The beneficial effects of the utility model are as follows: the push tube workpiece for high-speed rail has a non-standard shape, and the milling groove accuracy and structural shape have strict process requirements. The utility model must be used to ensure that the push tube workpiece is fixed in all directions, and the workpiece will not vibrate or deviate when milling the groove, which greatly improves the processing quality. In addition, according to the problem of large processing volume, we designed a special fixture that can fix four workpieces at the same time. Four workpieces can be processed at one time, which further improves the processing efficiency and output, and can complete customer orders with quality and quantity and meet various requirements such as processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the positioning fixture and the corresponding push cylinder workpiece after being assembled and fixed according to the embodiment of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the bottom surface of the positioning fixture described in an embodiment of the utility model.

[0015] In the figure: 1 fixture seat, 2 positioning groove, 3 push tube workpiece, 4 give way slot, 5 workpiece top plate, 6 tightening bolts, 7 left and right clamping cross arms, 8 fixing bolt one, 9 fixing bolt two. DETAILED DESCRIPTION

[0016] As attached Figure 1 , 2The figure shows an embodiment of a special fixture for milling grooves of a push tube workpiece for high-speed railways of the utility model. It includes a fixture base body 1 that can be detachably mounted on a workbench of a processing machine tool. Four rectangular positioning grooves 2 are arranged side by side on the fixture base body 1, and the bottom surface of the groove is designed to be an arc-shaped bottom surface corresponding to the push tube workpiece 3; a clearance slot 4 is opened in the center of the arc-shaped bottom surface, which is used to make way for the milling cutter head when milling grooves, and the width of the positioning groove 2 is set to just fit the push tube workpiece 3. A threaded through hole is provided on the lower side wall of the fixture base body 1, facing the center of the cross section of each positioning groove 2, and is equipped with a workpiece top plate 5 and a tightening bolt 6. The workpiece top plate 5 and the tightening bolt 6 can be used to tighten and position each push tube workpiece 3 to be processed along the axial direction of the positioning groove 2. Left and right clamping mechanisms for clamping the push cylinder workpiece in each positioning groove are respectively provided between the positioning grooves at the 1st, 2nd and 3rd, 4th positions in left and right order; fixing structures for fixing the clamp base body on the processing platform are provided at the left and right ends of the clamp base body 1.

[0017] As shown in the figure, the clamping mechanism includes symmetrical left and right clamping cross arms 7, a through hole is provided in the center of the left and right clamping cross arms 7, and a fixing bolt 8 is provided to pass through the through hole. Positioning threaded holes are provided in the middle of two adjacent positioning grooves 2 on the fixture seat body 1 corresponding to the through holes on the left and right clamping cross arms 7. The arm length of the left and right clamping cross arms 7 is designed to ensure that the adjacent push cylinder workpieces can be pressed at the same time. Each group of clamping mechanisms includes two clamping mechanisms, which are evenly arranged.

[0018] The fixing structure for fixing the clamp base 1 on the processing platform includes positioning holes and fixing bolts 9 provided at both ends of the clamp base 1. The clamp base 1 can be firmly fixed on the processing table of the processing machine tool by passing the fixing bolts 9 through the positioning holes.

[0019] In the specific implementation of the present invention, the number of the positioning grooves may be more than 4, such as 5 or 6.

[0020] In practice, each group of clamping mechanisms described in the implementation is provided with at least one clamping mechanism arranged in a central position; it can also be designed to be 2 or more, and each group of clamping machines is evenly arranged.

[0021] In actual use, any other clamping mechanism for clamping the push tube workpiece in the positioning groove should be regarded as an equivalent solution of the clamping mechanism in this embodiment.

Claims

1. A special fixture for milling grooves of push tube workpieces for high-speed railways, characterized in that: The special fixture includes a fixture base body which can be detachably mounted on a working table of a processing machine tool; four rectangular positioning grooves are arranged side by side on the fixture base body, and the bottom surface of the positioning groove is designed to be an arc-shaped bottom surface corresponding to and fitting with the push tube workpiece, and a clearance slot is opened in the center of the arc-shaped bottom surface, and the width of the positioning groove is set to just fit the push tube workpiece; a threaded through hole is provided on the lower side wall of the fixture base body, facing the center of the cross section of each positioning groove, and is equipped with a workpiece top plate and a tightening bolt; left and right sets of clamping mechanisms for clamping the push tube workpiece in each positioning groove are respectively provided between the positioning grooves located at the 1st, 2nd and 3rd, 4th positions in left and right order; fixing structures for fixing the fixture base body on the processing platform are respectively provided at the left and right ends of the fixture base body.

2. The special fixture for milling grooves of a push tube workpiece for high-speed railway according to claim 1 is characterized in that: The number of the positioning recesses is more than 4.

3. The special fixture for milling grooves of a push tube workpiece for high-speed railway according to claim 1 is characterized in that: Each group of clamping mechanisms is provided with at least one clamping mechanism, or is designed to be 2 or more, and each group of clamping mechanisms is evenly arranged.

4. The special fixture for milling grooves of a push tube workpiece for high-speed railway according to claim 1, characterized in that: The clamping mechanism includes symmetrical left and right clamping cross arms, a through hole is provided in the center of the left and right clamping cross arms, and a fixing bolt is provided passing through the through hole. Positioning threaded holes are provided in the middle position of two adjacent positioning grooves on the clamp seat body corresponding to the through holes on the left and right clamping cross arms. The arm length of the left and right clamping cross arms is designed to ensure that adjacent push cylinder workpieces can be pressed simultaneously.

5. The special fixture for milling grooves of a push tube workpiece for high-speed railway according to claim 1, characterized in that: The fixing structure for fixing the clamp seat body on the processing platform includes a row of positioning holes and two matching fixing bolts arranged at both ends of the clamp seat body. The clamp seat body can be firmly fixed on the processing table of the processing machine tool by passing the two fixing bolts through the positioning holes.

Images