Sealing ring turning clamp

Abstract

The invention discloses a sealing ring turning clamp which comprises a flexible positioning clamping jaw and a self-centering clamping mechanism, the self-centering clamping mechanism comprises a chuck base, a pull rod and a clamping jaw base, the flexible positioning clamping jaw is fixedly arranged on the clamping jaw base, the clamping jaw base is arranged in a sliding groove of the chuck base in a sliding mode, and the flexible positioning clamping jaw is fixedly arranged on the clamping jaw base. The clamping jaw base is connected with the top end of the pull rod through a connecting rod. According to the sealing ring turning clamp, the dual-purpose diameter-adjustable clamp for turning the inner ring and the outer ring of the sealing ring is provided, large-stroke clamping can be achieved, the inner ring and the outer ring share one clamp body, self-centering multi-point flexible clamping can be achieved, pre-clamping can be achieved through control of an external computer, and the machining efficiency is improved. The problem that an existing clamp cannot meet the clamping requirement for machining of parts such as metal sealing rings is effectively solved.

Description

Technical Field

[0001] The invention relates to the field of turning fixtures, in particular to a sealing ring turning fixture. Background Art

[0002] In turning, there have always been various problems in the traditional processing of thin-walled annular parts. When the traditional three-jaw clamp is clamped on thin-walled annular parts, there is often a problem that the parts are deformed due to excessive clamping force. Therefore, the fixture design should not only clamp and fix the processed parts, but also ensure the positioning accuracy and processing efficiency of the processed parts. However, the traditional fixture can no longer meet the processing requirements of thin-walled annular parts.

[0003] At present, domestic metal sealing ring turning processing mostly uses special fixtures, most of which are small-stroke fixtures. They adopt a hollow structure, the axis slit ensures the fixture stroke, and the wedge block is squeezed to clamp or open the fixture. Since the fixture stroke depends on the size of the gap of the axis slit, and in order to ensure reliable clamping, the slit distance is limited, the fixture stroke is too small. Each size requires a separate fixture, and the corresponding fixture needs to be replaced when processing parts of different sizes, which is time-consuming and labor-intensive. In addition, the same fixture cannot be used for the inner and outer rings, which is costly. Therefore, how to develop a sealing ring turning fixture has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a sealing ring turning fixture to solve the problem that the existing fixture cannot meet the clamping requirements of metal sealing ring parts processing.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention discloses a sealing ring turning fixture, comprising a flexible positioning claw and a self-centering clamping mechanism, wherein the self-centering clamping mechanism comprises a chuck base, a pull rod and a claw base, wherein the flexible positioning claw is fixedly arranged on the claw base, and the claw base is slidably arranged in a slide groove of the chuck base, and the claw base is connected to the top end of the pull rod through a connecting rod.

[0007] Furthermore, the flexible positioning claw includes a flexible auxiliary claw, a positioning claw body and a torsion spring. The flexible auxiliary claw is hinged on the edge of the positioning claw body through an auxiliary claw fixing seat and an auxiliary claw fixing shaft; the auxiliary claw fixing shaft is provided with a torsion spring that cooperates with the flexible auxiliary claw and the positioning claw body.

[0008] Furthermore, one end of the connecting rod is hingedly matched with the claw base through a rotating shaft seat and a rotating shaft bolt; the other end of the connecting rod is hingedly matched with the top end of the pull rod through a rotating shaft seat and a rotating shaft bolt.

[0009] Furthermore, the other end of the pull rod is connected to the telescopic rotation mechanism.

[0010] Furthermore, the pull rod is fixedly connected to the double-headed flange by a second flange fixing screw, a second thrust bearing is provided on the side of the double-headed flange close to the pull rod, a first thrust bearing is provided on the side of the double-headed flange away from the pull rod, and the double-headed flange is fixedly set on the single-headed flange by a U-shaped plate.

[0011] Furthermore, the single-head flange is fixedly arranged on the cylinder telescopic rod by means of a first flange fixing screw.

[0012] Furthermore, the single-head flange and the U-shaped plate are connected by a first flange fixing bolt, a second flange fixing bolt and a third flange fixing bolt.

[0013] Furthermore, the flexible positioning claw includes a first flexible auxiliary claw, a second flexible auxiliary claw, a third flexible auxiliary claw and a fourth flexible auxiliary claw; the second flexible auxiliary claw and the third flexible auxiliary claw cooperate with the inner wall of the part to be processed; the first flexible auxiliary claw and the fourth flexible auxiliary claw cooperate with the outer wall of the part to be processed.

[0014] Furthermore, the number of the flexible positioning claws is three, which are respectively connected to the first claw base, the second claw base and the third claw base through the first flexible claw fixing screw and the second flexible claw fixing screw.

[0015] Furthermore, an ultrasonic sensor is provided at one end of the claw base close to the pull rod.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are:

[0017] The sealing ring turning fixture of the present invention can clamp metal sealing rings with a large size difference, and can clamp the inner and outer rings of metal sealing rings without changing the fixture, which greatly reduces the number of times the fixture is replaced and improves the processing efficiency; the ultrasonic sensor installed on the sealing ring turning fixture of the present invention can detect the distance between the clamping bodies, and can realize pre-clamping through external computer control, and the fixture can be retracted or opened in advance to the size required for clamping, further improving the processing efficiency; the flexible positioning claws of the sealing ring turning fixture of the present invention can perform flexible multi-point clamping on the parts through flexible auxiliary claws while self-centering and clamping the parts, thereby increasing the force-bearing area of ​​the parts, so that the parts can be tightened reliably while being positioned and clamped, and will not be deformed due to excessive clamping force. In general, the sealing ring turning fixture of the present invention proposes a dual-purpose adjustable diameter clamp for turning inner and outer rings of sealing rings, which can not only realize large-stroke clamping, share a clamping body for inner and outer ring processing, and self-centering multi-point flexible clamping, but also can realize pre-clamping through external computer control, effectively solving the problem that the existing clamps cannot meet the clamping requirements of metal sealing ring parts processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the sealing ring turning fixture of the present invention;

[0020] Figure 2 It is a schematic diagram of the front structure of the flexible positioning claw;

[0021] Figure 3 It is a schematic diagram of the reverse structure of the flexible positioning claw;

[0022] Figure 4 It is a front structural schematic diagram of the self-centering clamping mechanism;

[0023] Figure 5 It is a schematic diagram of the reverse structure of the self-centering clamping mechanism;

[0024] Figure 6 It is a schematic diagram of the overall structure of the pull rod telescopic rotation mechanism;

[0025] Figure 7 for Figure 6 The structural diagram of the enlarged part;

[0026] Figure 8 A schematic diagram of the structure of the chuck base;

[0027] Fig. 9 It is a structural schematic diagram of the claw base;

[0028] Fig.10 It is a structural schematic diagram of a double-ended flange;

[0029] Fig.11 It is a structural diagram of a single-head flange.

[0030] Fig.12 It is a structural schematic diagram of a U-shaped disk.

[0031] Explanation of reference numerals: 1. flexible positioning claw; 101. first flexible claw fixing screw; 102. second flexible claw fixing screw; 103. first auxiliary claw fixing seat; 104. first auxiliary claw fixing screw; 105. second auxiliary claw fixing screw; 106. first auxiliary claw threaded fixing shaft; 107. first flexible auxiliary claw; 108. first torsion spring; 109. second auxiliary claw fixing seat; 1010. third auxiliary claw fixing screw; 1011. fourth auxiliary claw fixing screw; 1012. second auxiliary claw threaded fixing shaft; 1013. second flexible auxiliary claw Claw; 1014, second torsion spring; 1015, third auxiliary claw fixing seat; 1016, fifth auxiliary claw fixing screw; 1017, sixth auxiliary claw fixing screw; 1018, third auxiliary claw thread fixing shaft; 1019, third flexible auxiliary claw; 1020, third torsion spring; 1021, fourth auxiliary claw fixing seat; 1022, seventh auxiliary claw fixing screw; 1023, eighth auxiliary claw fixing screw; 1024, fourth auxiliary claw thread fixing shaft; 1025, fourth flexible auxiliary claw; 1026, fourth torsion spring; 1027, positioning claw body; 2. Self-centering clamping mechanism; 201. Pull rod; 202. First shaft bolt; 203. First shaft seat; 204. First connecting rod; 205. Second shaft bolt; 206. Second shaft seat; 207. First claw seat; 208. Third shaft bolt; 209. Third shaft seat; 2010. Second connecting rod; 2011. Fourth shaft bolt; 2012. Fourth shaft seat; 2013. Second claw seat; 2014. Fifth shaft bolt; 2015. Fifth shaft seat; 2016. Third connecting rod; 2017. Sixth Pivot bolt; 2018, sixth pivot seat; 2019, third clamping claw base; 2020, ultrasonic sensor; 2021, chuck base; 3, telescopic rotation mechanism; 301, cylinder telescopic rod; 302, first flange fixing screw; 303, single-head flange; 304, first flange fixing bolt; 305, second flange fixing bolt; 306, third flange fixing bolt; 307, U-shaped plate; 308, first thrust bearing; 309, double-head flange; 3010, second thrust bearing; 3011, second flange fixing screw. DETAILED DESCRIPTION

[0032] like Figures 1 to 10 As shown, a sealing ring turning fixture includes a flexible positioning claw 1, a self-centering clamping mechanism 2 and a telescopic rotating mechanism 3.

[0033] The self-centering clamping mechanism 2 includes a chuck base 2021, a pull rod 201 and a claw base, the flexible positioning claw 1 is fixedly arranged on the claw base, the claw base is slidably arranged in a slide groove of the chuck base 2021, and the claw base is connected to the top of the pull rod 201 through a connecting rod. An ultrasonic sensor 2020 is arranged at one end of the claw base close to the pull rod 201. Specifically, the ultrasonic sensor 2020 is arranged at the head of the third claw base 2019 to measure the position of the flexible positioning claw 1.

[0034] The chuck base 2021 is arranged on the head of the lathe spindle. The flexible positioning claw 1 includes a flexible auxiliary claw, a positioning claw body 1027 and a torsion spring. The flexible auxiliary claw is hingedly arranged on the edge of the positioning claw body 1027 through an auxiliary claw fixing seat and an auxiliary claw fixing shaft; a torsion spring cooperating with the flexible auxiliary claw and the positioning claw body 1027 is arranged on the auxiliary claw fixing shaft. The flexible auxiliary claw is arranged on both sides of the positioning claw body 1027 through the auxiliary claw fixing shaft and the auxiliary claw fixing seat. The torsion spring passes through the auxiliary claw fixing shaft to keep the flexible auxiliary claw in an eight-shaped shape and provide clamping force when clamping.

[0035] One end of the connecting rod is hingedly matched with the claw base through a rotating shaft seat and a rotating shaft bolt; the other end of the connecting rod is hingedly matched with the top end of the pull rod 201 through a rotating shaft seat and a rotating shaft bolt.

[0036] The other end of the pull rod 201 is connected to the telescopic rotation mechanism 3. The pull rod 201 passes through the hollow main shaft of the lathe.

[0037] Specifically, the pull rod 201 is fixedly connected to the double-headed flange 309 by a second flange fixing screw 3011, a second thrust bearing 3010 is provided on the side of the double-headed flange 309 close to the pull rod 201, a first thrust bearing 308 is provided on the side of the double-headed flange 309 away from the pull rod 201, and the double-headed flange 309 is fixedly arranged on the single-headed flange 303 by a U-shaped plate 307. The single-headed flange 303 and the U-shaped plate 307 are connected by a first flange fixing bolt 304, a second flange fixing bolt 305 and a third flange fixing bolt 306.

[0038] The single-end flange 303 is fixedly arranged on the cylinder telescopic rod 301 by the first flange fixing screw 302. The double-end flange 309 is a hollow stepped shaft, through which the pull rod 201 passes, and the pull rod 201 is fixedly connected to the double-end flange 309 by the flange fixing screw. The two stepped parts are respectively provided with thrust bearings, so that the outer rings of the two thrust bearings are fixed when the parts are processed, and the inner rings rotate with the pull rod 201.

[0039] When the rod 201 rotates during part processing, the circumferential stillness of the cylinder telescopic rod 301 will not affect the rotation of the rod 201, that is, will not affect the processing of the part, because the double-headed flange 309 on the rod 201 is provided with a first thrust bearing 308 and a second thrust bearing 3010. When the part is clamped, the cylinder telescopic rod 301 can transmit axial force to the rod 201 through the single-headed flange 303 and the U-shaped plate 307 to complete the clamping.

[0040] Specifically, the flexible positioning claw 1 includes a first flexible auxiliary claw 107, a second flexible auxiliary claw 1013, a third flexible auxiliary claw 1019 and a fourth flexible auxiliary claw 1025; the second flexible auxiliary claw 1013 and the third flexible auxiliary claw 1019 cooperate with the inner wall of the part to be processed; the first flexible auxiliary claw 107 and the fourth flexible auxiliary claw 1025 cooperate with the outer wall of the part to be processed.

[0041] The surface of the flexible auxiliary claw is made of soft material such as rubber, and when clamped, the flexible auxiliary claw and the part are in surface contact, thereby increasing the force-bearing area.

[0042] The first flexible auxiliary claw 107 is rotatably arranged on the first auxiliary claw fixing seat 103 of the positioning claw body 1027 through the first auxiliary claw threaded fixing shaft 106, and the first auxiliary claw fixing seat 103 is fixed to the positioning claw body 1027 through the first auxiliary claw fixing screw 104 and the second auxiliary claw fixing screw 105. The first flexible auxiliary claw 107 is matched with the positioning claw body 1027 through the first torsion spring 108.

[0043] The second flexible auxiliary claw 1013 is rotatably arranged on the second auxiliary claw fixing seat 109 of the positioning claw body 1027 through the second auxiliary claw threaded fixing shaft 1012, and the second auxiliary claw fixing seat 109 is fixed to the positioning claw body 1027 through the third auxiliary claw fixing screw 1010 and the fourth auxiliary claw fixing screw 1011. The second flexible auxiliary claw 1013 cooperates with the positioning claw body 1027 through the second torsion spring 1014.

[0044] The third flexible auxiliary claw 1019 is rotatably arranged on the third auxiliary claw fixing seat 1015 of the positioning claw body 1027 through the third auxiliary claw threaded fixing shaft 1018, and the third auxiliary claw fixing seat 1015 is fixed to the positioning claw body 1027 through the fifth auxiliary claw fixing screw 1016 and the sixth auxiliary claw fixing screw 1017. The third flexible auxiliary claw 1019 cooperates with the positioning claw body 1027 through the third torsion spring 1020.

[0045] The fourth flexible auxiliary claw 1025 is rotatably arranged on the fourth auxiliary claw fixing seat 1021 of the positioning claw body 1027 through the fourth auxiliary claw threaded fixing shaft 1024, and the fourth auxiliary claw fixing seat 1021 is fixed to the positioning claw body 1027 through the seventh auxiliary claw fixing screw 1022 and the eighth auxiliary claw fixing screw 1023. The fourth flexible auxiliary claw 1025 cooperates with the positioning claw body 1027 through the fourth torsion spring 1026.

[0046] There are three flexible positioning claws 1, which are respectively connected to the first claw base 207, the second claw base 2013 and the third claw base 2019 through the first flexible claw fixing screw 101 and the second flexible claw fixing screw 102.

[0047] One end of the first connecting rod 204 is hingedly engaged with the first rotating shaft seat 203 on the pull rod 201 through the first rotating shaft bolt 202 , and the other end of the first connecting rod 204 is hingedly engaged with the second rotating shaft seat 206 on the first claw base 207 through the second rotating shaft bolt 205 .

[0048] One end of the second connecting rod 2010 is hingedly engaged with the third rotating shaft seat 209 on the pull rod 201 through the third rotating shaft bolt 208 , and the other end of the second connecting rod 2010 is hingedly engaged with the fourth rotating shaft seat 2012 on the second claw base 2013 through the fourth rotating shaft bolt 2011 .

[0049] One end of the third connecting rod 2016 is hingedly matched with the fifth rotating shaft seat 2015 on the pull rod 201 through the fifth rotating shaft bolt 2014, and the other end of the third connecting rod 2016 is hingedly matched with the sixth rotating shaft seat 2018 on the third claw base 2019 through the sixth rotating shaft bolt 2017.

[0050] Taking the processing of the inner ring of a metal sealing ring as an example, the specific operation steps of this device are as follows:

[0051] The first step is to connect the device to an external power source, an external controller, and reset the device to prepare for startup;

[0052] The second step is to input the dimensions of the part to be clamped into the external controller and press the start button;

[0053] The third step is to wait for the controller to issue a pre-clamping instruction. After the controller issues a pre-clamping instruction, the cylinder contracts and drives the cylinder telescopic rod 301 to pull the double-headed flange 309 through the single-headed flange 303 and the U-shaped disk 307, and the double-headed flange 309 pulls the pull rod 201 to move. The pull rod 201 moves axially and drives the first connecting rod 204, the second connecting rod 2010 and the third connecting rod 2016 to move, so that the first connecting rod 204, the second connecting rod 2010 and the third connecting rod 2016 pull the bottom of the first clamping claw. The seat 207, the second claw base 2013 and the third claw base 2019 move, so that the first claw base 207, the second claw base 2013 and the third claw base 2019 drive the three flexible positioning claws 1 to start moving simultaneously, and the ultrasonic sensor 2020 detects the moving distance of the flexible positioning claw 1. When the flexible positioning claw 1 moves to the pre-clamping position, the cylinder stops contracting, and the cylinder telescopic rod 301 stops the three flexible positioning claws 1 from moving, waiting for the parts to be placed in place;

[0054] The fourth step, after the parts are placed in place, the cylinder contracts again, the cylinder telescopic rod 301 pulls the double-headed flange 309 through the single-headed flange 303 and the U-shaped plate 307, the double-headed flange 309 pulls the pull rod 201 to move, the pull rod 201 moves axially to drive the first connecting rod 204, the second connecting rod 2010 and the third connecting rod 2016 to move, so that the first connecting rod 204, the second connecting rod 2010 and the third connecting rod 2016 pull the first claw base 207, the second claw base 2013 and the third claw base 2019 to move, so that the first claw base 207, the second claw base 2013 and the third claw base 2019 drive the three flexible positioning claws 1 to start moving simultaneously until the parts are completely clamped, the cylinder stops telescoping, and the cylinder telescopic rod 301 stops the three flexible positioning claws 1 from moving, waiting for the processing to be completed;

[0055] Step 5. After the parts are processed, press the end button, the cylinder extends, the cylinder telescopic rod 301 pushes the double-headed flange 309 through the single-headed flange 303 and the U-shaped plate 307, and the double-headed flange 309 pushes the pull rod 201 to move. The pull rod 201 moves axially to drive the first connecting rod 204, the second connecting rod 2010 and the third connecting rod 2016 to move, so that the first connecting rod 204, the second connecting rod 2010 and the third connecting rod 2016 push the first claw base 207, the second claw base 2013 and the third claw base 2019 to move, so that the first claw base 207, the second claw base 2013 and the third claw base 2019 drive the three flexible positioning claws 1 to start moving at the same time, and the ultrasonic sensor 220 detects the distance moved by the flexible positioning claw 1. When the flexible positioning claw 1 moves to the pre-clamping position, the cylinder stops contracting, and the cylinder telescopic rod 301 stops the three flexible positioning claws 1 from moving, waiting for the next part to be placed in place;

[0056] Step 6. After the next part is placed in place, repeat steps 4 to 5 until all parts are processed.

[0057] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A sealing ring turning fixture, characterized in that: It comprises a flexible positioning claw (1) and a self-centering clamping mechanism (2), wherein the self-centering clamping mechanism (2) comprises a chuck base (2021), a pull rod (201) and a claw base, wherein the flexible positioning claw (1) is fixedly arranged on the claw base, and the claw base is slidably arranged in a slide groove of the chuck base (2021), and the claw base is connected to the top end of the pull rod (201) via a connecting rod.

2. The sealing ring turning fixture according to claim 1, characterized in that: The flexible positioning claw (1) comprises a flexible auxiliary claw, a positioning claw body (1027) and a torsion spring; the flexible auxiliary claw is hingedly arranged on the edge of the positioning claw body (1027) via an auxiliary claw fixing seat and an auxiliary claw fixing shaft; the auxiliary claw fixing shaft is provided with a torsion spring that cooperates with the flexible auxiliary claw and the positioning claw body (1027).

3. The sealing ring turning fixture according to claim 1, characterized in that: One end of the connecting rod is hingedly matched with the clamping claw base through a rotating shaft seat and a rotating shaft bolt; the other end of the connecting rod is hingedly matched with the top end of the pull rod (201) through a rotating shaft seat and a rotating shaft bolt.

4. The sealing ring turning fixture according to claim 1, characterized in that: The other end of the pull rod (201) is connected to the telescopic rotation mechanism (3).

5. The sealing ring turning fixture according to claim 4, characterized in that: The pull rod (201) is fixedly connected to the double-headed flange (309) by a second flange fixing screw (3011); a second thrust bearing (3010) is arranged on the side of the double-headed flange (309) close to the pull rod (201); a first thrust bearing (308) is arranged on the side of the double-headed flange (309) away from the pull rod (201); and the double-headed flange (309) is fixedly arranged on the single-headed flange (303) by a U-shaped plate (307).

6. The sealing ring turning fixture according to claim 1, characterized in that: The single-head flange (303) is fixedly arranged on the cylinder telescopic rod (301) by means of a first flange fixing screw (302).

7. The sealing ring turning fixture according to claim 5, characterized in that: The single-head flange (303) and the U-shaped plate (307) are connected via a first flange fixing bolt (304), a second flange fixing bolt (305) and a third flange fixing bolt (306).

8. The sealing ring turning fixture according to claim 1, characterized in that: The flexible positioning claw (1) comprises a first flexible auxiliary claw (107), a second flexible auxiliary claw (1013), a third flexible auxiliary claw (1019) and a fourth flexible auxiliary claw (1025); the second flexible auxiliary claw (1013) and the third flexible auxiliary claw (1019) cooperate with the inner wall of the part to be processed; the first flexible auxiliary claw (107) and the fourth flexible auxiliary claw (1025) cooperate with the outer wall of the part to be processed.

9. The sealing ring turning fixture according to claim 1, characterized in that: The number of the flexible positioning claws (1) is three, which are respectively connected to the first claw base (207), the second claw base (2013) and the third claw base (2019) through the first flexible claw fixing screw (101) and the second flexible claw fixing screw (102).

10. The sealing ring turning fixture according to claim 1, characterized in that: An ultrasonic sensor (2020) is provided at one end of the claw base close to the pull rod (201).

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