CN207971453U - Fixture for the drilling of lathe tail-bracket - Google Patents

Abstract

A jig for drilling holes in the rear bracket of a lathe, including a pressure plate, a pull rod, a support rod, a cylinder, a clamp body, a drill sleeve 1, a drill sleeve 2, a drilling template, a positioning pin 1 and a positioning pin 2, and the clamp body consists of a base plate and The support plate is formed; the positioning pin 1 and the positioning pin 2 are vertically arranged at the left end of the front surface of the support plate of the clamp body; the cylinder is vertically installed on the support plate of the clamp body, and its piston rod passes through the support plate of the clamp body and is connected with the rear end pin of the tie rod The front end of the pull rod passes through the pressure plate, the rear end of the pull rod is screwed with lock nut one, and the pull rod between the lock nut one and the pressure plate is covered with a spring; the rear end of the support rod is connected with the front surface of the clamp body support plate; the drilling template is installed on On the upper surface of the clamp body support plate, a drill sleeve 1 and a drill sleeve 2 are installed on the drill template. The fixture takes the two holes on one side of the rear bracket of the lathe as the positioning reference, and can realize the complete positioning of the rear bracket of the lathe. It is clamped by an air cylinder, has a simple and reliable structure, is convenient to replace parts, and has high processing efficiency.

Description

Fixtures for drilling holes in rear brackets of lathes

technical field

The utility model relates to a fixture, in particular to a fixture used for drilling holes in the rear bracket of a lathe, and belongs to the technical field of mechanical processing.

Background technique

The part shown in Figure 1 is a lathe rear bracket, which is an important part of the machine tool. The surface quality of the surface affects the assembly quality of the machine or component, and then affects its performance and working life, so its processing is very critical and important. Drilling machine refers to a machine tool that mainly uses a drill bit to process holes on a workpiece. Usually, the rotation of the drill bit is the main movement, and the axial movement of the drill bit is the feed movement. It can drill through holes, blind holes, replace special tools, expand, countersink, ream or Perform machining such as tapping. Therefore, threaded hole 1-1 and circular hole 1-2 on the lathe rear bracket shown in Fig. 1 will process with drilling machine. Drilling requires fixtures to position and clamp the workpiece. Due to the irregular shape of the part, it is difficult to fix the workpiece. Therefore, a special fixture designed for processing this part is required.

Contents of the invention

In order to solve the above problems, the utility model provides a jig for drilling the rear bracket of the lathe. The jig takes the two holes on one side of the rear bracket of the lathe as the positioning reference, and can realize the complete positioning of the rear bracket of the lathe. Clamping, simple and reliable structure, convenient replacement of parts, high processing efficiency. The device has a simple structure and is easy to install.

In order to achieve the above object, the utility model adopts the following technical solutions: a fixture for drilling the rear bracket of the lathe, including a pressure plate, a pull rod, a support rod, a cylinder, a clamp body, a drill bushing, a drill bushing 2, a drilling template, Locating pin 1 and locating pin 2, the described clamping body is made of base plate and support plate, and base plate and supporting plate are perpendicular to each other; Described locating pin 1 and locating pin 2 are vertically arranged on the left end of the front surface of the supporting plate of clamping body, positioning Pin 1 and positioning pin 2 are matched with the two positioning holes on the blank of the rear bracket of the lathe, and the distance between the axis of the positioning pin 1 and the axis of the positioning pin 2 is equal to the distance between the axes of the two positioning holes of the rear bracket of the lathe. Locating pin 1 and locating pin 2 are in the same vertical plane; the cylinder is vertically installed on the support plate of the clamp body, and its piston rod is connected with the rear end pin of the pull rod after passing through the support plate of the clamp body; the pull rod The front end of the pull rod passes through the pressure plate, the rear end of the pull rod is screwed with a lock nut one, and the pull rod between the lock nut one and the pressure plate is covered with a spring; the rear end of the support rod is threadedly connected with the right end of the front surface of the clamp body support plate, Place it in the groove matched with the right end of the pressing plate; the left end of the pressing plate is placed in front of the rear bracket blank of the lathe; the drilling template is installed on the upper surface of the clamp body support plate, and the drilling template Drill sleeve 1, drill sleeve 2, drill sleeve 1 and drill sleeve 2 correspond to the positions of the threaded holes and light holes on the rear bracket of the lathe;

Further, the rear end of the positioning pin passes through the support plate of the clamp body and is screwed with a lock nut 3, and the right end of the screw 2 passes through the left side of the support plate of the clamp body and is placed on the cylindrical surface of the positioning pin 1 to match with it. in the hole;

Further, a lock nut 2 is screwed at the contact point between the rear end of the support rod and the support plate of the clamp body;

Further, a bushing 1 is sleeved between the drill sleeve 1 and the drill template, and a bush 2 is sleeved between the drill sleeve 2 and the drill template;

Further, the first positioning pin is a cylindrical pin, and the second positioning pin is a rhombic pin.

The utility model takes the two holes on one side of the rear bracket of the lathe as the positioning reference, can realize the complete positioning of the rear bracket of the lathe, and adopts the cylinder to drive the pressure plate to clamp, the structure is simple and reliable, the replacement of parts is convenient, and the processing efficiency is high. The device has a simple structure and is easy to install.

Description of drawings

Fig. 1 is a part diagram of the rear bracket of the lathe, and Fig. 1 (a) to Fig. 1 (c) in Fig. 1 are the front view, left view and top view of the rear bracket of the lathe respectively.

Fig. 2 is the front view of the utility model.

Fig. 3 is a left view of the utility model.

Fig. 4 is a top view of the utility model.

Among the figure: 1, pressing plate, 3, pull rod, 4, spring, 6, support rod, 7, lock nut one, 8, lock nut two, 9, screw one, 11, cylinder, 12, lock nut three, 14. Clamp body, 16. Screw two, 19. Drill bushing one, 20. Screw three, 21. Drill bushing two, 22. Screw four, 23. Drill template, 24. Bushing two, 25, Bushing one, 26 , screw five, 27, fixed pin, 28, alignment pin one, 29, alignment pin two.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described (the left-right direction in the following description, up-down direction and front-back direction are identical with the left-right direction in Fig. 2, up-down direction and front-back direction, and the direction far away from the reader is after among Fig. 2).

As shown in Figure 1, it is the parts diagram of the rear bracket of the lathe to be processed. From Figure 1(a) to Figure 1(c), it is the front view, left view and top view of the rear bracket of the lathe, and the lathe is to be drilled. Threaded hole 1-1 and light hole 1-2 on the back bracket; As shown in Figure 2 to Figure 4, a kind of fixture that is used for lathe back bracket drilling, comprises pressing plate 1, pull bar 3, support bar 6, cylinder 11. Clamp body 14, drill sleeve one 19, drill sleeve two 21, drill template 23, positioning pin one 28 and positioning pin two 29, the clamp body 14 is composed of a base plate and a support plate, and the base plate and the support plate are perpendicular to each other; Described positioning pin one 28 and positioning pin two 29 are vertically arranged on the left end of the support plate front surface of clamp body 14, and positioning pin one 28 and positioning pin two 29 cooperate with two positioning holes on the back bracket blank of the lathe, and positioning The distance between the pin one 28 axis and the positioning pin two 29 axes is equal to the distance between the two positioning hole axes of the lathe rear bracket, and the positioning pin one 28 and the positioning pin two 29 are in the same vertical plane; Cylinder 11 is vertically installed on clamp body 14 support plates by four screws-9, and its piston rod passes through clamp body 14 support plates and is connected with the rear end pin of pull rod 3; the front end of described pull rod 3 passes through pressing plate 1, A pressure head with a size larger than the hole diameter of the pressing plate 1 is provided on it, and a lock nut 7 is screwed on the rear end of the pull rod 3, and a spring 4 is sleeved on the pull rod 3 between the lock nut 7 and the pressing plate 1, and the spring 4 is in the Compressed state; the rear end of the support rod 6 is threadedly connected to the right end of the front surface of the clamp body 14 support plate, and the front end is placed in the groove matched with the right end of the pressing plate 1; the left end of the pressing plate 1 is placed in the rear bracket blank of the lathe The front side; said drilling template 23 is installed on the upper surface of clamp body 14 support plate by screw five 26 and two fixed pins 27, and said drill sleeve one 19 is installed on the drilling template 23 by screw three 20, by screw Four 22 are equipped with described drill bushing two 21, drill bushing one 19 and drill bushing two 21 and the threaded hole on the back bracket of the lathe and the positions of the light holes are corresponding.

The working principle of the present utility model: the clamp is assembled before processing, the clamp body 14 is installed on the workbench of the drilling machine, the rear bracket blank of the lathe is placed on the clamp body 14, and when placed, the positioning pin-28 and the positioning pin Pin 2 29 respectively matches with the two positioning holes of the blank, starts the cylinder 11, and the cylinder 11 drives the pressure plate 1 to move backward until the left end of the pressure plate 1 presses the blank of the rear bracket of the lathe, and starts the vertical drilling machine to drill the threaded bottom hole at the same time Two holes can also be drilled in stages; after the drilling is completed, the cylinder 11 is started, and the cylinder 11 drives the pull rod 3 to move forward, and the pressure plate 1 moves forward under the restoring force of the spring 4. When the support rod 6 is disengaged After the pressing plate 1, rotate the pressing plate 1, take out the processed workpiece, and replace it with the next workpiece for processing. In this way, the production work can be completed efficiently.

The rear end of the positioning pin one 28 passes through the support plate of the clamp body 14 and is screwed with a lock nut three 12. The right end of the screw two 16 passes through the left side of the support plate of the clamp body 14 and is placed on the cylindrical surface of the positioning pin one 28 and In the matching positioning hole; this kind of structure does not need the positioning pin-28 to interfere with the clamp body 14, which is convenient for installing and disassembling the clamp and replacing related parts.

Lock nut 2 8 is screwed at the contact between the rear end of the support rod 6 and the clamp body 14 support plates, which plays a positioning role, and when preventing the clamping workpiece, the threaded connection between the support rod 6 clamp body 14 support plates is stressed and deformed Or damage, resulting in a decrease in the accuracy of the fixture, and at the same time, it can also reduce the increased cost due to fixture damage.

A bushing one 25 is set between the drill bushing one 19 and the drill template 23, and a bushing two 24 is set between the drill bushing two 21 and the drill template 23, which can prevent the drill bushing and the drill template from being directly connected. The reduction of machining accuracy caused by contact friction can also quickly replace related parts, which not only saves money but also improves machining efficiency.

The first locating pin 28 is a cylindrical pin, the second locating pin 29 is a rhombic pin, and the cylindrical pin and the rhomboid pin cooperate to locate, which can realize complete positioning without over-locating, which is convenient for installation.

Claims (5)

1. a kind of fixture for the drilling of lathe tail-bracket, it is characterised in that：Including pressing plate (1), pull rod (3), supporting rod (6), Cylinder (11), clamp body (14), drill bushing one (19), drill bushing two (21), bushing plate (23), positioning pin one (28) and positioning pin two (29), the clamp body (14) is made of bottom plate and support plate, and bottom plate and support plate are mutually perpendicular to；The positioning pin one (28) and positioning pin two (29) be vertically located at clamp body (14) support plate front surface left end, positioning pin one (28) and positioning pin Two (29) are matched with two location holes on lathe tail-bracket blank, positioning pin one (28) axis and positioning pin two (29) axis The distance between the distance between two pilot hole axes of lathe tail-bracket equal, positioning pin one (28) and positioning pin two (29) In the same vertical guide；The cylinder (11) is vertically mounted in clamp body (14) support plate, its piston rod passes through fixture Rear end pin connection after body (14) support plate with pull rod (3)；The front end of the pull rod (3) passes through pressing plate (1), pull rod (3) Rear end is rotary with locking nut one (7), and spring (4) is cased on the pull rod (3) between locking nut one (7) and pressing plate (1)；Described Supporting rod (6) rear end is threadedly coupled with clamp body (14) support plate front surface right end, front end is placed in pressing plate (1) right end and it coordinates Groove in；The left end of the pressing plate (1) is placed in the front of lathe tail-bracket blank；The bushing plate (23) is mounted on folder Specifically on the upper surface of (14) support plate, the drill bushing one (19), drill bushing two (21), drill bushing one are installed on bushing plate (23) (19) and drill bushing two (21) is corresponding with the position of threaded hole and unthreaded hole on lathe tail-bracket.

2. a kind of fixture for the drilling of lathe tail-bracket according to claim 1, it is characterized in that：The positioning pin one (28) rear end is rotary with locking nut three (12) after passing through clamp body (14) support plate, and screw two (16) right end passes through clamp body (14) Support plate left side is placed in the location hole coordinated with it on positioning pin one (28) cylindrical surface.

3. a kind of fixture for the drilling of lathe tail-bracket according to claim 1 or 2, it is characterized in that：In supporting rod (6) The contact position of rear end and clamp body (14) support plate be rotary with locking nut two (8).

4. a kind of fixture for the drilling of lathe tail-bracket according to claim 3, it is characterized in that：In the drill bushing one (19) it is cased with bushing one (25) between bushing plate (23), bushing is cased between the drill bushing two (21) and bushing plate (23) Two (24).

5. a kind of fixture for the drilling of lathe tail-bracket according to claim 4, it is characterized in that：The positioning pin one (28) it is straight pin, positioning pin two (29) is rhombus pin.