CN2728705Y

CN2728705Y - Location fixture

Info

Publication number: CN2728705Y
Application number: CN 200420090933
Authority: CN
Inventors: 刘忠明
Original assignee: 刘忠明
Current assignee: Shanghai Thai Pml Precision Mechanism Ltd
Priority date: 2004-10-12
Filing date: 2004-10-12
Publication date: 2005-09-28
Anticipated expiration: 2014-10-12

Abstract

The utility model discloses a location fixture. A base is provided with a square tooth and four dummy clubs, a connecting hole is arranged in the square tooth, and a clamp block is provided with a connecting block and four location slices. The connecting hole is arranged in the connecting block, and the base is connected with the clamp block through a connecting link. As the base of the utility model is provided with the square tooth and four dummy clubs, the clamp block is provided with the connecting block and four location slices, the base clamping chuck of universal fixture is unified, making workpieces which are installed on the clamp block be processed in an identical plane all the time. Thus, the installation is convenient and fast and the precision of the installation is high when in the process of converting processing. The utility model makes use of the square tooth to position in 4*90 degrees to realize the multiaspect processing, and the structure is simple and the processing difficulty is low. The location fixture can be installed on the mainshaft of a machine tool, the work top of a boring machine milling machine, the work top of a wire cutting, the mainshaft of an electric spark and the work top, and the location fixture can be used for various location systems of production lines.

Description

A kind of positioning fixture

Technical field:

The utility model relates to the technical field of universal fixturing, a kind of specifically positioning fixture that can be used for multiple mechanical.

Background technology:

Comparatively advanced at present and positioning fixture that close anchor clamps have countries such as Switzerland, Sweden to produce mostly adopts cross profile of tooth location, its processing is complicated, cost is also higher, high price can not be used domestic a lot of enterprise in a large number, in mechanical processing process, because the interface disunity of various lathes, workpiece is in the processing transfer process, workpiece is installed to imitate before the processing is just needing to consume a large amount of time, imitates state and technical ability that positive precision also depends on operating personnel, has influenced production efficiency.

Summary of the invention:

The purpose of this utility model provides a kind of positioning fixture, and it can shorten the set-up time in use, enhances productivity, and has reduced the difficulty of processing of anchor clamps.

To achieve these goals, the technical solution of the utility model is: a kind of positioning fixture, it mainly comprises base, the grip block that matches with base, it is characterized in that: base is provided with square shaped teeth and four boss, is provided with connecting hole in square shaped teeth, and grip block is provided with contiguous block and four spacers, be provided with connecting hole in contiguous block, base is connected by connecting rod with grip block.

The utility model is owing to be provided with square shaped teeth and four boss at base, grip block is provided with contiguous block and four spacers, unified universal fixturing the base chuck, the workpiece to be processed that is contained on the grip block is in the same coordinate system all the time, therefore in the process of conversion processing, easy for installation, fast, the precision height, and utilize the base square teeth to carry out the location of 4 * 90 degree, can realize multiaspect processing, and structure is comparatively simple, difficulty of processing is low, these anchor clamps can be installed in lathe spindle, boring machine milling machine table face, line cutting work top, on the main shaft and work top of electric spark, the navigation system that also can be used for various production lines, the utility model can shorten the time that clamping is installed greatly, need not adjust, can save a large amount of man-hours, and improved installation accuracy, can improve 20-50% through production efficiency on probation, the utilization rate of lathe also can improve 20-30%, makes the price of the market price of anchor clamps product well below external similar imported product, be convenient to domestic enterprise, especially medium-sized and small enterprises can use in a large number, are the fund that these enterprises have saved the equipment of acquiring, and have improved production capacity and efficient.

Description of drawings:

Fig. 1 is the structural representation of the utility model one embodiment

Fig. 2 is the understructure schematic diagram among Fig. 1

Fig. 3 is the vertical view of Fig. 2

Fig. 4 is the connecting rod structural representation among Fig. 1

Fig. 5 is the grip block structural representation among Fig. 1

Fig. 6 is the vertical view of Fig. 5

Fig. 7 is the partial schematic diagram that initial shape grip block is connected with base by connecting rod

Fig. 8 is the partial schematic diagram that grip block is connected with base by connecting rod

The specific embodiment:

Below in conjunction with drawings and Examples the utility model is further described.

The utility model mainly comprises base 1, the grip block 2 that matches with base 1, it is different from prior art and is: base 1 is provided with square shaped teeth 3 and four boss 4, in square shaped teeth 3, be provided with connecting hole 5, grip block 2 is provided with contiguous block 6 and four spacers 12, be provided with connecting hole 7 in contiguous block 6, base 1 is connected by connecting rod 8 with grip block 2; Square shaped teeth is a square teeth in the enforcement, the connecting hole 5 of base 1 is a through hole, the connecting hole 7 of grip block 2 is provided with screw thread, and connecting rod 8 also is provided with the screw thread that matches, and the square shaped teeth limit of base is provided with the conical surface, this conical surface has a guide section 9 and a positioning section 10, periphery at base 1 is provided with connecting hole 11, is the groove shape between the square shaped teeth of base and the boss, and four boss on the base are positioned at same plane, as the locating surface of short transverse, the connecting hole of periphery is as the usefulness that is connected and fixed with lathe; The grip block of present embodiment is provided with four cavitys 13, periphery at grip block is provided with four small boss 14 and four connecting holes 15, this connecting hole is arranged in the small boss, the size of four spacers of grip block and four conical surfaces of base square teeth matches, be used for the X on plane, the location of Y direction, four small boss of grip block periphery also are positioned at same plane, and as the locating surface of short transverse, the connecting hole that is provided with in the boss is as the usefulness that is connected with processing work.

Positioning principle of the present utility model is, 1, when the guide section of positioning clamping piece by the square shaped teeth conical surface of base contacts with base, be in original state, and there is the gap between the boss locating surface of two parts, see Fig. 7 for details; 2, stir connecting rod, along with the screw thread of connecting rod is constantly locked, the gap of the boss locating surface of grip block and base disappears, two locating surfaces overlap when being adjacent to, and four spacer generation strains of grip block produce coupling mechanism force, thereby reach pinpoint effect, see Fig. 8 for details; 3, stir connecting rod more in the other direction, unclamp and be threaded, after grip block and base break away from, four spacers of grip block restore to the original state, these anchor clamps utilize the metallic spring distortion, have formed flexible location, reach the high accuracy of resetting, repetitive positioning accuracy is 0.01mm, and the angle precision of 4 * 90 degree is 0.01 degree.Below provide a concrete use embodiment: the blade of engine needs the Processing Curve groove, because it is complex-shaped, in spark machined, run into long problem of location alignment time, now use these anchor clamps, can address this problem, the concrete operations step is as follows, 1, on the main shaft of spark-erosion machine tool and work top, load onto the base of anchor clamps respectively, and with the central gauge of the square shaped teeth of base to same axis; 2, the electrode that processes is installed on the terminal clamp that has grip block, the processing of this terminal clamp is to finish on the basis, location of grip block, so the center of the position of electrode and grip block is a fixed value; 3, reaching workpiece is installed on the frock clamp that has grip block, because the processing of frock clamp also is to finish on the basis of grip block location, the position of workpiece and the center of grip block also are fixed values, and the position that this fixed value is adjusted to electrode is same fixed value; 4, add man-hour, lock, the frock clamp that workpiece is housed is installed on the base square shaped teeth of spark-erosion machine tool work top and locks as long as will be equipped with on the base that the terminal clamp of electrode is placed in the spark-erosion machine tool main shaft, can gap discharge processing.In discharge processing; outside machine, the second cover terminal clamp and frock clamp can be installed again; after the first cover workpiece discharge machines; it is unloaded; and install second and overlap; go round and begin again; quick and easy for installation; therefore shortened the installation adjustment time greatly on the one hand,, only used 4 minutes till now by original 120 minutes; improved machine tool utilization rate on the other hand again greatly; shutdown originally is 3: 1 with the ratio of process time, then is 1: 10 (4: 40) now, and the utilization rate of lathe has improved 3-4 times nearly.

Claims

1, a kind of positioning fixture, it mainly comprises base, the grip block that matches with base, it is characterized in that: base is provided with square shaped teeth and four boss, in square shaped teeth, be provided with connecting hole, grip block is provided with contiguous block and four spacers, is provided with connecting hole in contiguous block, and base is connected by connecting rod with grip block.

2, a kind of positioning fixture as claimed in claim 1 is characterized in that: the square shaped teeth limit of base is provided with the conical surface, and this conical surface has a guide section and a positioning section, is provided with connecting hole at the periphery of base.

3, a kind of positioning fixture as claimed in claim 1 is characterized in that: grip block is provided with four cavitys, is provided with four small boss and four connecting holes at the periphery of grip block.

4, a kind of positioning fixture as claimed in claim 1 or 2 is characterized in that: be the groove shape between the square shaped teeth of base and the boss.

5, as claim 1 or 2 or 3 described a kind of positioning fixtures, it is characterized in that: four boss of base are positioned at same plane, and four small boss of grip block periphery also are positioned at same plane.