Clamp for machining three faces of valve body on vertical lathe

Abstract

A clamp for machining three faces of a valve body on a vertical lathe comprises a main supporting frame, the main supporting frame is installed on a vertical lathe chuck, and the centers of the main supporting frame and the vertical lathe chuck are concentric; the rotary mould frame is arranged on the inner side of the main supporting frame and is rotationally connected with the main supporting frame through a supporting shaft, and the supporting shaft on one side of the main supporting frame is provided with a gear transmission mechanism; one end, extending out of the outer wall of the main support frame, of the screw rod is locked by a locking nut after the screw rod and the inner hole of the support shaft are assembled through threads, and the other end of the screw rod is provided with a clamping jaw for clamping a valve body; the outer end of the supporting shaft on the other side of the main supporting frame is connected with a bearing, and the bearing is positioned and fixed through a bearing gland. Through one-time valve body clamping, valve body correction, firm fixation and corresponding angle adjustment, the to-be-machined surfaces of the valve body can be machined in sequence, repeated clamp assembling and disassembling are reduced, correction, clamping and hoisting times are reduced, meanwhile, the machining efficiency is improved, the machining period is shortened, and convenience and rapidness are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve machining technical field, concretely is a kind of fixture for three faces of valve body of vertical lathe machining. BACKGROUND

[0002] In the valve manufacturing process, the machining precision of valve body directly affects the performance and service life of valve. When machining valve body, the traditional fixture is often first clamped one side flange, processes the other side flange, after processing, the head is clamped again, and the other side flange is processed, and then the left and right flanges are positioned and clamped, and the middle flange is processed; after processing, clamp 5 ° jig again to process sealing surface; such processing efficiency is low, and the processing cycle is long, etc. Batch processing, more low efficiency; valve body machining clamping correction multiple times, it is very time-consuming and laborious; Especially in the process of ordinary lathe or vertical lathe, repeated clamping alignment, efficiency is not high, need to ensure that valve body machining can maintain stable positioning and precision, require higher fixture. Therefore, the above multiple clamping mode needs to be optimized, and a simple clamping fixture that can process all required surfaces once is designed. SUMMARY

[0003] The utility model provides a kind of fixture for three faces of valve body of vertical lathe machining, to improve the efficiency, precision and stability of valve body machining.

[0004] To achieve the above object, the technical scheme adopted by the utility model is:

[0005] A kind of fixture for three faces of valve body of vertical lathe machining, including total support frame, the total support frame is installed on vertical lathe chuck and the center is concentric;Rotary jig frame is set to the inside of total support frame and is rotationally connected with total support frame by support shaft, gear transmission mechanism is installed on the support shaft of the side of total support frame;After screw rod and support shaft inner hole thread fit, the end of the outer wall of total support frame is locked with lock nut, and the other end of screw rod is installed jaw for clamping valve body;The outer end of the support shaft of the other side of total support frame and bearing are connected, and the bearing is positioned and fixed with bearing gland.

[0006] The gear transmission mechanism includes a large gear, a pinion, the large gear is connected to the support shaft by key, the pinion is connected to the pinion positioning shaft sleeve by key, the pinion positioning shaft sleeve is installed on the protruding shaft on the total support frame, and the large gear and the pinion are engaged transmission;The gear transmission mechanism is limited by limiting structure.

[0007] The limiting structure includes limiting block that the limiting block is installed on the outer circumferential surface of the cylinder with internal thread hole, and the head shape of limiting block and the tooth shape of pinion are matched;First threaded hole and second threaded hole are opened on the total support frame below pinion, and threaded stud is installed in the first threaded hole and the second threaded hole, and the other end of threaded stud is matched with the internal thread of the cylinder of limiting structure.

[0008] The claw is a claw structure which is shaped and contoured to fit the valve body.

[0009] An adjusting bolt is arranged on the bottom surface of the total support frame, and the adjusting bolt is in contact with the valve body.

[0010] A gear cover is arranged outside the gear transmission mechanism.

[0011] The novel valve body machining device can clamp the valve body once, fix the valve body firmly, adjust the corresponding angle, and then process the required machining surface of the valve body, so that the machining efficiency and machining period are improved, and the machining precision and stability are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional structure schematic view (valve body is rotated by 90 degrees) of the novel valve body machining device;

[0013] Figure 2 It is a three-dimensional upper and lower two-angle shaft side schematic view of the novel valve body machining device (valve body is rotated by 90 degrees);

[0014] Figure 3 It is a front view structure schematic view of the novel valve body machining device; Figure 2

[0015] Figure 4 It is a front view schematic view when the valve body is normally installed;

[0016] Figure 5 It is a claw structure schematic view of the novel valve body machining device;

[0017] Figure 6 It is a gear cover schematic view of the novel valve body machining device;

[0018] Figure 7 It is a left view schematic view of the novel valve body machining device; Figure 1

[0019] Figure 8 It is a limiting clamping block structure schematic view of the novel valve body machining device;

[0020] Figure 9 It is a support shaft structure schematic view of the novel valve body machining device;

[0021] Figure 10 It is a rotating jig frame structure schematic view of the novel valve body machining device. DETAILED DESCRIPTION

[0022] The novel valve body machining device will be described in detail in combination with the drawings and specific embodiments.

[0023] Refer to Figures 1-10 ​​A kind of fixture for machining three faces of valve body for vertical lathe, including total support frame, the total support frame 1 is installed on vertical lathe chuck and the center is concentric;Rotary fixture frame 2 is set in the inside of total support frame 1 and is rotationally connected with total support frame 1 by support shaft 3, gear transmission mechanism is installed on the support shaft 3 of one side of total support frame 1;Screw rod 4 and support shaft 3 inner hole are screwed and are locked by lock nut 13 after the end of total support frame outer wall is stretched out, and the other end of screw rod 4 is installed jaw 14 for clamping valve body 6;The outer end of support shaft 3 on the other side of total support frame 1 is connected with bearing 7, and bearing 7 is positioned and fixed by bearing gland 8.

[0024] Total support frame 1 is connected by bolt pressing plate with vertical lathe chuck, and the center hole of the bottom plate of the two components is concentric;One end of support shaft 3 is fixed by bolt connection with rotary fixture frame 2, while the other end of support shaft 3 is fitted in the shaft hole of total support frame 1, and the center holes of the three are concentric;After screw rod 4 and support shaft are screwed, the large round head of the end of screw rod is installed in the recess hole at the back of jaw 14 and is pressed and bolted by gland 5.Manually rotate the left end of screw rod, and the corresponding left and right jaws move, so that the two states of jaw clamping and loosening can be formed;Ensure firm clamping without displacement;Adjust the concentricity of the center of valve body, support frame and vertical lathe chuck before clamping.

[0025] When the rotary valve body is machined to the machining surface, the total support frame and the rotary fixture frame are positioned by pin shaft. Specifically, Figure 7 As shown, the left end of total support frame is provided with 17-1, 17-2 and 17-3 pin shaft holes which are 90° apart, Figure 2 As shown, the right end of total support frame is provided with 18-1, 18-2 and 18-3 pin shaft holes which are 90° apart;Use wrench to rotate the end of positioning shaft, then drive the entire rotary fixture frame to rotate, and after rotating to the corresponding position, insert the pin shaft into the corresponding pin shaft hole to fix the total support frame and the rotary fixture frame as a whole. Figure 10 As shown, the rotary fixture frame is provided with four pin shaft holes with positions of 0°, 90°, 180° and 270° respectively (to facilitate accurate positioning and fixing after rotating 90°), and the center distance of the pin shaft holes is the same as that of the pin shaft holes on the total support frame.

[0026] The gear transmission mechanism includes large gear 10 and small gear 9, the large gear 10 is keyed to the support shaft 3, and the small gear 9 is keyed to the small gear positioning shaft sleeve 15, which is installed on the protruding shaft of the total support frame, and the large gear 10 and the small gear 9 are in meshing transmission, and the gear transmission mechanism is limited by limiting structure.

[0027] The limiting structure comprises a limiting block 11, which is installed on the outer circumferential surface of a cylinder with an internally threaded hole, and the head of the limiting block 11 is shaped to match the tooth shape of the pinion 9; the total support frame 1 below the pinion 9 is provided with a first threaded hole 11-1 and a second threaded hole 11-2, a stud is installed in the first threaded hole 11-1 and the second threaded hole 11-2, and the other end of the stud is matched with the internally threaded hole of the cylinder of the limiting structure. When the gear is rotated to the appropriate position, the limiting block clamps the gear to limit the gear transmission.

[0028] The claw 14 is shaped to match the claw structure of the valve body. Such a design makes the clamp clamping firm and not prone to loosening to cause position deviation; for multi-directional limiting and clamping of the valve body, it is beneficial to the non-deviation of the center of the valve body.

[0029] The bottom surface of the total support frame 1 is provided with an adjusting bolt 16, which is in contact with the valve body. If there is a gap between the center of the valve body and the center of the screw rod, the adjusting bolt 16 is finely adjusted so that the valve body is concentric with the center of the screw rod.

[0030] A gear cover is installed outside the gear transmission mechanism. The gear cover is screwed on the outer wall of the total support frame so that the gear mechanism cannot be displaced.

[0031] The clamping process of the utility model is as follows:

[0032] The valve body processed by the utility model has three flange openings, which are all machined surfaces. When installing, the valve body is hoisted between the two claws, and alignment and leveling are performed. The surface of the valve body without opening is in contact with the bottom surface of the rotary jig frame through the screw 12. If there is a gap between the center of the valve body and the center of the screw rod, the screw 12 on the bottom surface of the rotary jig frame is finely adjusted so that the valve body is concentric with the center of the screw rod. Then, the screw rod is driven to rotate to move the left and right claws to the corresponding positions to clamp the valve body, the center is adjusted, and the valve body is clamped and fixed firmly. After the final requirement is met, the locking nuts are locked after the two end claws are tightened, the limiting block is clamped at the corresponding clamping position, and the pin shaft is inserted into the corresponding pin shaft hole for fixation. After the whole is fixed, the corresponding flange is processed. After processing, the flange is adjusted by 90°, and the corresponding flange is fixed by the pin shaft for processing. The corresponding flange processing surface is processed by adjusting the corresponding angle. Until the required processing surface is completed. At this time, the valve body is disassembled and replaced, and the next valve body is processed. The cycle is repeated.

Claims

1. A fixture for machining three sides of a valve body on a vertical lathe, comprising a main support frame, characterized in that, The main support frame (1) is installed on the vertical chuck and the two are concentric; the rotating jig frame (2) is set inside the main support frame (1) and is rotatably connected to the main support frame (1) through the support shaft (3). A gear transmission mechanism is installed on the support shaft (3) on one side of the main support frame (1); after the screw (4) and the inner hole of the support shaft (3) are threaded together, one end of the screw (4) extending out of the outer wall of the main support frame is locked with a lock nut (13), while the other end of the screw (4) is equipped with a chuck (14) for clamping the valve body (6); the outer end of the support shaft (3) on the other side of the main support frame (1) is connected to a bearing (7), and the bearing (7) is positioned and fixed by a bearing cap (8).

2. The fixture for machining three sides of a valve body on a vertical lathe according to claim 1, characterized in that, The gear transmission mechanism includes a large gear (10) and a small gear (9). The large gear (10) is keyed to the support shaft (3), and the small gear (9) is keyed to the small gear positioning sleeve (15). The small gear positioning sleeve (15) is installed on the convex shaft on the main support frame, and the large gear (10) and the small gear (9) mesh and transmit power. The gear transmission mechanism is limited by a limiting structure.

3. A fixture for machining three sides of a valve body on a vertical lathe according to claim 2, characterized in that, The limiting structure includes a limiting block (11) which is installed on the outer circumferential surface of a cylinder with an internal threaded hole. The head shape of the limiting block (11) matches the tooth profile of the pinion (9). A first threaded hole (11-1) and a second threaded hole (11-2) are opened on the main support frame (1) below the pinion (9). Studs are installed in the first threaded hole (11-1) and the second threaded hole (11-2). The other end of the stud is fitted with the internal thread of the cylinder of the limiting structure.

4. A fixture for machining three sides of a valve body on a vertical lathe according to claim 1, characterized in that, The claw (14) is a claw structure whose shape is adapted to the shape of the valve body.

5. A fixture for machining three sides of a valve body on a vertical lathe according to claim 1, characterized in that, An adjusting bolt (16) is provided on the bottom surface of the main support frame (1), and the adjusting bolt (16) is in contact with the valve body.

6. A fixture for machining three sides of a valve body on a vertical lathe according to claim 1, characterized in that, A gear cover is installed on the outside of the gear transmission mechanism.

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