Tool clamp suitable for accurate machining and positioning of clamping sleeve

Abstract

The utility model discloses a tool clamp suitable for accurate machining and positioning of a clamping sleeve. The tool clamp comprises a clamping cylinder, a push rod, a fixed shaft sleeve, a sliding shaft sleeve and a spring. The fixed shaft sleeve, the sliding shaft sleeve, the spring and the push rod are sequentially sleeved in the clamping cylinder, so that the push rod reciprocates along the central axis of the clamping cylinder. The clamping cylinder comprises spring flaps arranged at the front end of a cylinder body and limiting grooves located in the multiple spring flaps. The push rod comprises a rod body and a pushing part; and the pushing part is positioned in the limiting groove. During clamping operation, the manipulator automatically feeds the blank, so that the blank is propped against the pushing part to push the push rod to move backwards until the rear end of the pushing part is propped against the bottom of the limiting groove, and accurate positioning of the entering length of the blank is completed; the machine tool pull rod drives the clamping cylinder to move backwards, and the spring flaps are folded through the machine tool horn opening to clamp and fix the periphery of the blank. According to the tool clamp, the push rod is matched with the limiting groove, the clamping length and clamping force of a blank are accurately controlled, and the concentricity during cutting operation and the consistency of formed products are guaranteed.

Description

Technical Field

[0001] The embodiments of the utility model belong to the technical field of ferrule processing, and more specifically, relate to a tooling fixture suitable for precise processing and positioning of ferrules. Background Art

[0002] A ferrule is a tubular object that is usually used to fix pipes or pipe fittings. Ferrules are usually made of rubber, plastic or metal. The shape can be different, but the basic principle is the same, that is, the ferrule is put on the pipe or pipe fitting to fix it. Ferrules are often used in piping systems and industrial equipment, such as to fix water pipes, gas pipes, electrical wire pipes, cable protection pipes, etc.

[0003] At present, the production of ferrules is completed by turning steel pipes or simple stamping single engineering molds; when turning steel pipes, the outer periphery of the tubular blank is generally clamped and fixed by a machine tool with a spring chuck. However, when the existing spring chucks (such as 625 and 643 clamps) are automatically fed and clamped by the manipulator, due to unstable positioning, the length of the tubular blank entering the spring chuck is inconsistent, which will lead to ferrule product size deviation, that is, the ferrule length is inconsistent, the edge wall thickness is uneven, and the concentricity is not high. This phenomenon will affect the consistency and sealing performance of the ferrule product.

[0004] Therefore, at this stage, there is an urgent need for a tooling fixture suitable for the precise processing and positioning of the ferrule, so that when the ferrule is fed and clamped, the clamping part can be accurately positioned, the clamping length can be kept consistent, and the concentricity during cutting can be guaranteed. Summary of the invention

[0005] In view of the problems that the spring chuck in the prior art cannot locate the clamping position of the ferrule and cannot ensure the product consistency of the ferrule, the utility model provides a tooling fixture suitable for precise processing and positioning of the ferrule to solve such problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a tooling fixture suitable for precise processing and positioning of a ferrule, comprising a fixed sleeve, a sliding sleeve, a spring and a push rod which are sequentially sleeved in a chuck; wherein the chuck comprises a spring petal arranged at the front end of the barrel, and a limiting groove located in a plurality of spring petals; the push rod reciprocates along the central axis of the chuck, and comprises a rod body, and a pushing portion fixed at the front end of the rod body; the pushing portion is located in the limiting groove, and the rod body passes through a sliding hole provided at the center of the groove.

[0007] Furthermore, the depth of the limiting groove is adapted to the required clamping length of the ferrule blank, and a sliding hole is provided at the center thereof, and the rod body passes through the sliding hole to perform reciprocating motion.

[0008] Furthermore, the pushing portion is a pancake-shaped structure, and its outer diameter is larger than the sliding hole.

[0009] Furthermore, the fixed sleeve is sleeved in the chuck, and an annular limit portion is provided on the outer periphery of its front end, and a first annular step portion is provided inside; the outer diameter of the annular limit portion is the same as that of the barrel, so that the fixed sleeve coincides with the central axis of the chuck.

[0010] Furthermore, the sliding sleeve includes a first shaft tube and a second shaft tube fixedly connected, the outer diameter of the first shaft tube is the same as the inner diameter of the fixed sleeve, and the inner diameter is the same as the outer diameter of the spring; the outer diameter of the second shaft tube is the same as the inner diameter of the first annular step portion, and the inner diameter is the same as the outer diameter of the push rod, and its front end is in conflict with the rear end of the spring.

[0011] Furthermore, a thread is provided on the outer periphery of the rear end of the sliding sleeve body, and the first anti-dropping nut is threadedly connected to the moving sleeve to block and limit the fixed sleeve to prevent the fixed sleeve from falling off.

[0012] Furthermore, a thread is provided on the outer periphery of the rear end of the push rod, and the second anti-slip nut is threadedly connected to the rear end of the push rod to block and limit the sliding sleeve to prevent the push rod from slipping out.

[0013] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0014] (1) The fixture of the utility model limits the displacement distance of the push rod by cooperating with the limit groove, thereby adjusting the clamping force of the spring petal and positioning the length of the blank entering the clamp barrel, thereby ensuring the concentricity during the cutting operation and the consistency and sealing performance of the formed product.

[0015] (2) The tooling fixture of the utility model adopts an integrated push rod, and a fixed shaft sleeve, a sliding shaft sleeve, a spring and a push rod are sequentially sleeved in the clamping barrel, so that the push rod reciprocates along the central axis of the clamping barrel, thereby avoiding radial displacement when the blank contacts the push rod, resulting in an error in the entry length, and also avoiding abnormal noise caused by shaking of the push rod when it rotates; by coaxially sleeved multiple components in sequence, the stability of the clamping barrel is guaranteed, which is beneficial to improving the dimensional accuracy of the product cutting and forming, and improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of a fixture suitable for accurate processing and positioning of a ferrule in an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the fixture in the embodiment of the utility model;

[0018] Figure 3 This is an exploded schematic diagram of a fixture in an embodiment of the utility model;

[0019] Figure 4This is a schematic diagram of the structure of the work clamp in the embodiment of the utility model;

[0020] Figure 5 It is a rear view of the work clamp in the embodiment of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the push rod in the embodiment of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the fixed shaft sleeve in the embodiment of the utility model;

[0023] Figure 8 It is a schematic diagram of the structure of the sliding sleeve in the embodiment of the utility model.

[0024] In all the drawings, the same figure marks represent the same technical features, specifically: 1-clamp, 11-spring petal, 111-first step portion, 12-limiting groove, 13-barrel, 131-inner thread portion, 14-sliding hole, 2-push rod, 21-push portion, 22-rod body, 23-second step portion, 3-fixed sleeve, 31-annular limiting portion, 32-first annular step portion, 4-sliding sleeve, 41-first shaft tube, 42-second shaft tube, 5-spring, 6-first anti-slip nut, 7-second anti-slip nut. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] like Figure 1-8As shown, the utility model provides a tooling fixture suitable for accurate processing and positioning of a ferrule, comprising a chuck 1, a push rod 2, a fixed shaft sleeve 3, a sliding shaft sleeve 4 and a spring 5. The fixed shaft sleeve 3, the sliding shaft sleeve 4, the spring 5 and the push rod 2 are sequentially sleeved in the chuck 1, so that the push rod 2 reciprocates along the central axis of the chuck 1. The chuck 1 comprises a spring petal 11 arranged at the front end of a barrel 13, and a limiting groove 12 located in a plurality of spring petals 11, and the rear end of the barrel 13 is fixedly connected to a machine tool pull rod; the push rod 2 comprises a rod body 22, and a push portion 21 fixedly arranged at the front end of the rod body 22; the push portion 21 is located in the limiting groove 12, and the rod body 22 passes through a sliding hole 14 provided at the center of the groove 12. When clamping, the manipulator automatically feeds the material, so that the blank contacts the push part 21 and pushes the push rod 2 backward until the rear end of the push part 21 contacts the bottom of the limiting groove 12, completing the precise positioning of the blank's entry length; the machine tool pull rod drives the clamp backward, and the spring petals are gathered through the machine tool bell mouth to clamp the outer periphery of the blank and perform the next cutting operation. The tooling fixture of the utility model accurately controls the clamping length and clamping force of the blank through the cooperation of the push rod 2 and the limiting groove 12, ensuring the concentricity during the cutting operation and the consistency and sealing performance of the formed product.

[0027] like Figure 4 As shown, the chuck 1 completes the clamping and loosening of the blank through the elastic deformation of the spring petal 11, and includes a spring petal 11, a limiting groove 12 and a barrel 13. The front end of the barrel 13 is an inverted cone structure, and its taper is adapted to the bell mouth on the machine tool; an internal threaded portion 131 is provided inside the rear end of the barrel 13, and the threaded fixed connection between the rear end of the chuck 1 and the pull rod of the machine tool is realized through the internal threaded portion 131; when the blank is clamped, the pull rod pulls the chuck 1 backward into the bell mouth, and as the chuck 1 moves backward, the bell mouth gradually increases the inward extrusion force of the spring petal 11, thereby firmly pressing the blank. The spring petal 11 is provided at the front end of the barrel 13, and is formed by evenly cutting the front end of the barrel 13 in the axial direction. Further, a first step portion 111 is provided inside the spring petal 11, and a plurality of circumferentially arranged first step portions 111 form a limiting groove 12; the groove depth of the limiting groove 12 is adapted to the clamping length required for the ferrule blank. Furthermore, a sliding hole 14 is provided at the center of the limiting groove 12 , and the push rod 2 can pass through the sliding hole 14 to perform reciprocating motion.

[0028] like Figure 6As shown, the push rod 2 includes a push portion 21 and a rod body 22; the front end of the rod body 22 is fixedly connected to the center of the rear end of the push portion 21, and the central axes of the two coincide; the push portion 21 is a pancake-shaped structure, and its outer diameter is larger than the sliding hole 14. When moving backward, it contacts the bottom of the limiting groove 12, thereby limiting the displacement distance of the push rod 2, playing a role in adjusting the clamping force of the spring petal 11 and positioning the length of the blank entering the chuck 1. Further, the rod body 22 is also provided with a second step portion 23, which contacts the front end of the spring 5 and pushes the spring 5 to move backward. Further, in order to prevent the push rod 2 from falling out of the sliding sleeve 4, the outer periphery of the rear end of the rod body 22 is provided with a thread, and the second anti-slip nut 7 is threadedly connected to the rear end of the push rod 2 to block and limit the sliding sleeve 4 to prevent the push rod 2 from falling out.

[0029] like Figure 7 As shown, the fixed sleeve 4 is sleeved in the chuck 1, and an annular limiting portion 31 is provided on the outer periphery of the front end thereof, and a first annular step portion 31 is provided inside; the outer diameter of the annular limiting portion 31 is the same as that of the barrel 13, so that the fixed sleeve 4 coincides with the central axis of the chuck 1; the first annular step portion 31 limits the sliding sleeve 4.

[0030] like Figure 8 As shown, the sliding sleeve 4 is slidably arranged in the fixed sleeve 4, including a first shaft tube 41 and a second shaft tube 42 that are fixedly connected. The outer diameter of the first shaft tube 41 is the same as the inner diameter of the fixed sleeve 4, and the inner diameter is the same as the outer diameter of the spring 5; the outer diameter of the second shaft tube 42 is the same as the inner diameter of the first annular step portion 31, and the inner diameter is the same as the outer diameter of the rod body 22 of the push rod 2, and its front end is in conflict with the rear end of the spring 5. Further, in order to prevent the fixed sleeve 3 from falling off from the rear end of the sliding sleeve 4, the outer periphery of the rear end of the second shaft tube 42 is provided with a thread, and the first anti-slip nut 6 is threadedly connected to the moving sleeve 4 to block and limit the fixed sleeve 3 to prevent the fixed sleeve 3 from falling off.

[0031] When assembling the fixture, pass the push rod 2 through the clamp 1 so that the push portion 21 is located in the limiting groove 12, and the spring 5 is sleeved on the push rod 2; insert the sliding sleeve 4 from the rear end of the push rod 2, so that the front end of the spring 5 abuts against the second step portion 23 of the push rod 2, and the rear end of the spring 5 abuts against the front end of the second shaft tube 42 of the sliding sleeve 4; sleeve the fixed sleeve 4 on the outer periphery of the sliding sleeve 4 and slide it into the clamp 1; tighten and fix the first anti-slip nut 6 at the rear end of the sliding sleeve 4 to prevent the fixed sleeve 3 from falling off; tighten and fix the second anti-slip nut 7 at the rear end of the push rod 2 to prevent the push rod 2 from falling off.

[0032] When the utility model performs a clamping operation, after the tooling fixture is fixed to the machine tool and debugging is completed, the manipulator automatically feeds the material, so that the blank contacts the push portion 21 to push the push rod 2 backward, until the rear end of the push portion 21 contacts the bottom of the limiting groove 12, and the blank enters the precise positioning of the axis length; the machine tool pull rod pulls the clamp 1 backward to enter the bell mouth, and as the clamp 1 moves backward, the bell mouth gradually increases the inward squeezing force of the spring petal 11, thereby firmly pressing the blank for the next cutting operation; after the cutting operation is completed, the pull rod pushes the clamp 1 out of the bell mouth, the spring petal 11 resets, and the clamping of the molded part is released, and the spring 5 pushes the push portion 21 forward to reset the push rod 2, and the molded product is ejected, thereby automatically completing the unloading.

[0033] The tooling fixture of the utility model limits the displacement distance of the push rod 2 by cooperating with the limiting groove 12, thereby adjusting the clamping force of the spring petal 11 and positioning the length of the blank entering the clamping barrel 1, thereby ensuring the concentricity during the cutting operation and the consistency and sealing performance of the formed product.

[0034] The tooling fixture of the utility model adopts an integrated push rod 2, and the fixed shaft sleeve 3, the sliding shaft sleeve 4, the spring 5 and the push rod 2 are sequentially sleeved in the clamping tube 1, so that the push rod 2 reciprocates along the central axis of the clamping tube 1, thereby avoiding radial deviation caused by the blank contacting the push rod 2 and causing an error in the entry length, and also avoiding abnormal noise caused by the deviation and shaking of the push rod 2 during rotation; by coaxially sleeved a plurality of components in sequence, the stability of the clamping set is guaranteed during clamping, which is beneficial to improving the dimensional accuracy of the product cutting and forming, and improving the product quality.

[0035] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixture suitable for accurate processing and positioning of ferrules, characterized in that: include: A fixed shaft sleeve (3), a sliding shaft sleeve (4), a spring (5) and a push rod (2) are sequentially sleeved in the chuck (1); The clamp (1) comprises a spring petal (11) arranged at the front end of the barrel (13), and a plurality of limiting grooves (12) located in the spring petals (11); The push rod (2) reciprocates along the central axis of the chuck (1), and comprises a rod body (22) and a push portion (21) fixed to the front end of the rod body (22); the push portion (21) is located in the limiting groove (12), and the rod body (22) passes through a sliding hole (14) provided at the center of the groove (12).

2. A fixture suitable for accurate processing and positioning of a ferrule according to claim 1, characterized in that: The depth of the limiting groove (12) is adapted to the clamping length required for the ferrule blank, and a sliding hole (14) is provided at the center thereof, and the rod body (22) passes through the sliding hole (14) to perform reciprocating motion.

3. A fixture suitable for accurate processing and positioning of a ferrule according to claim 2, characterized in that: The pushing portion (21) is a pancake-shaped structure, and its outer diameter is larger than the sliding hole (14).

4. A fixture suitable for accurate processing and positioning of a ferrule according to any one of claims 1 to 3, characterized in that: The fixed sleeve (3) is sleeved in the chuck (1), and an annular limiting portion (31) is provided on the outer periphery of the front end thereof, and a first annular step portion (32) is provided inside; the outer diameter of the annular limiting portion (31) is the same as that of the barrel (13), so that the central axis of the fixed sleeve (3) and the chuck (1) coincide.

5. A fixture suitable for accurate processing and positioning of a ferrule according to any one of claims 1 to 3, characterized in that: The sliding sleeve (4) comprises a first shaft tube (41) and a second shaft tube (42) which are fixedly connected. The outer diameter of the first shaft tube (41) is the same as the inner diameter of the fixed sleeve (3), and the inner diameter is the same as the outer diameter of the spring (5). The outer diameter of the second shaft tube (42) is the same as the inner diameter of the first annular step portion (32), and the inner diameter is the same as the outer diameter of the rod body (22) of the push rod (2), and the front end thereof abuts against the rear end of the spring (5).

6. A fixture suitable for accurate processing and positioning of a ferrule according to any one of claims 1 to 3, characterized in that: The outer periphery of the rear end of the sliding sleeve (4) is provided with threads, and the first anti-drop nut (6) is threadedly connected to the sliding sleeve (4) to block and limit the fixed sleeve (3) to prevent the fixed sleeve (3) from falling off.

7. A fixture suitable for accurate processing and positioning of a ferrule according to any one of claims 1 to 3, characterized in that: The rear end of the push rod (2) is provided with a thread on its outer periphery, and the second anti-slip nut (7) is threadedly connected to the rear end of the push rod (2) to block and limit the sliding sleeve (4) to prevent the push rod (2) from slipping out.

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