A surface treatment device for collet production

Abstract

This utility model discloses a surface treatment device for collet production, including a nitriding furnace and a hanger suspended into the furnace cavity. Several sets of hanging brackets for suspending collets are fixed within the hanger. The hanger is equipped with a limiting structure that restricts the collets to a suspended state and automatically releases them after nitriding of the outer surface. Below the limiting structure is a receiving bracket for nitriding the released collets and their central inner hole. This utility model, by setting up the hanger and receiving bracket, allows the collet surface nitriding to be performed in stages. The collets are first suspended on the hanger for nitriding of their outer surface and elastic grooves. After the outer surface nitriding is completed, the limiting structure automatically releases the collets, allowing them to fall into the receiving bracket below via a slide rail. This ensures that the collet's inner hole is detached from any fixed support surface, avoiding incomplete nitriding of the contact surface caused by the collet's bottom end contacting the material basket or support.

Description

Technical Field

[0001] This utility model relates to the field of collet production technology, specifically to a surface treatment device for collet production. Background Technology

[0002] A collet is a mechanical device used to clamp cylindrical workpieces or cutting tools on machine tools or power tools. It is usually conical with several evenly distributed elastic grooves along the axial direction, giving it the ability to contract and expand radially.

[0003] During repeated clamping and releasing, the inner clamping surface of the collet will rub against the workpiece, so the surface of the collet needs to be nitrided to improve its surface hardness.

[0004] Currently, collets are usually placed in a material basket or placed on a bracket with a positioning rod before being fed into the nitriding furnace. After the collets are placed on the positioning rod, the bottom end contacts the bracket or the material basket, which affects the completeness of the collet nitriding. Utility Model Content

[0005] The purpose of this utility model is to provide a surface treatment device for collet production. By setting up a hanging frame and a receiving frame, the collet completes the nitriding of its outer surface and elastic groove on the hanging frame. After the outer surface nitriding is completed, the collet is released from the limiting structure through the limiting structure, so that the collet is released into the receiving frame for further nitriding of the central inner hole, thereby improving the comprehensiveness of the nitriding coverage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a surface treatment device for collet production, comprising a nitriding furnace and a hanger suspended into the inner cavity of the nitriding furnace. The hanger has several sets of hanging frames for suspending the collets. The hanger is provided with a limiting structure that can restrict the collets to a suspended state and automatically release the collets after nitriding of the outer surface of the collets. Below the limiting structure is a receiving frame for receiving the released collets and nitriding the inner hole of the collet's center.

[0007] Preferably, the limiting structure includes a fixing rod fixed to the top of the hanger and an electric push rod with a diameter smaller than the inner diameter of the cone end of the collet. The fixing rod passes through the collet, and a mounting frame for mounting the electric push rod is fixed to the bottom of the fixing rod. A hollow tube is fixed to the bottom of the mounting frame, and the electric push rod is fixed in the mounting frame by screws. The telescopic end of the electric push rod extends into the hollow tube and is equipped with a drive structure.

[0008] Preferably, the limiting structure further includes a mounting base fixed to the bottom end of the hollow tube and two sets of limiting rods disposed in the mounting base. The mounting base is shaped like a gate, and one end of each set of limiting rods is rotatably connected to the mounting base via a rotating shaft. The two sets of limiting rods are V-shaped.

[0009] Preferably, the drive structure includes a rack fixed to one end of the electric push rod, and gears are fixed to the outer walls of both sets of rotating shafts. The rack meshes with the two sets of gears on both sides respectively.

[0010] Preferably, the hanging bracket is provided with several sets, and each hanging bracket has several sets of limiting structures arranged linearly and equidistantly.

[0011] Preferably, both ends of the receiving rack are fixed to the hanging frame with screws, the bottom of the receiving rack is open, and a wire mesh is fixed to the open bottom end of the receiving rack.

[0012] Preferably, the outer wall of the receiving frame is fixed with a perimeter to prevent the collet from detaching from the receiving frame after release, and one side of one of the perimeters is fixed with a guide rail for guiding the release of the collet. The guide rail is arc-shaped, and the top of the hanger is riveted with a lifting ring to facilitate the hoisting of the hanger.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention utilizes a hanging bracket and a receiving bracket to allow for staged nitriding of the collet surface. The collet is first suspended on the hanging bracket for nitriding of its outer surface and elastic groove. After the outer surface nitriding is complete, the limiting structure automatically releases the collet, allowing it to fall into the receiving bracket below via a slide rail. Nitriding the collet in a horizontal position ensures that its inner hole is detached from any fixed support surface, allowing nitrogen gas to fully contact the inner hole area and preventing incomplete nitriding of the contact surface caused by the collet's bottom contacting the material basket or support.

[0015] The limiting structure of this utility model is driven by an electric push rod, in conjunction with a gear and rack, so that the collet can be automatically released after the outer surface is nitrided, without the need for manual intervention in the operation inside the high-temperature furnace, thus improving the efficiency of surface treatment. Attached Figure Description

[0016] Figure 1 This is an isometric drawing of this utility model;

[0017] Figure 2 This is a structural schematic diagram of the hanging bracket of this utility model;

[0018] Figure 3 This is a schematic diagram of the external structure of the limiting structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the limiting structure of this utility model;

[0020] Figure 5 This is a structural schematic diagram of the hanger of this utility model;

[0021] Figure 6This is a schematic diagram showing the position of the present invention after it has been hoisted into the nitriding furnace.

[0022] In the diagram: 1. Nitriding furnace; 2. Hanger; 3. Bracket; 4. Limiting structure; 5. Container rack; 401. Fixing rod; 402. Electric push rod; 403. Mounting frame; 404. Hollow tube; 405. Drive structure; 406. Mounting base; 407. Limiting rod; 4051. Rack; 4052. Gear; 501. Wire mesh; 502. Edge band; 503. Lifting ring; 504. Slide rail; 6. Collet clamp. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 This utility model provides a technical solution: a surface treatment device for producing collets, including a nitriding furnace 1 and a hanger 2 suspended into the inner cavity of the nitriding furnace 1. The hanger 2 has several sets of hanging frames 3 for hanging collets 6. The hanging frame 3 is provided with a limiting structure 4 that can restrict the collets 6 to a hanging state and automatically release the collets 6 after the outer surface of the collets 6 is nitrided. Below the limiting structure 4, there is a receiving frame 5 for receiving the released collets 6 and nitriding the inner hole of the center of the collets 6.

[0025] Hanger 2 carries all processing components, including hanger 3, limiting structure 4, and receiving rack 5, which are hoisted into the high-temperature nitriding furnace chamber 1 as a whole. Hanger 3 is the initial processing station. During the initial nitriding stage, limiting structure 4 restricts the collet 6 to a suspended state, ensuring that its outer surface and elastic groove are fully exposed. After the outer surface is nitrided, the restriction is automatically released, releasing the collet 6. The receiving rack 5 is located below limiting structure 4 and is used to receive the released collet 6. It also uses slide rail 504 to keep the collet 6 in a horizontal position during the second stage, ensuring that the central inner hole of the collet 6 is fully exposed to the nitrogen environment for nitriding and does not contact the support surface.

[0026] The limiting structure 4 includes a fixing rod 401 fixed to the top of the hanger 3 and an electric push rod 402 with a diameter smaller than the inner diameter of the conical end of the collet 6. The fixing rod 401 passes through the collet 6. The bottom of the fixing rod 401 is fixed with a mounting frame 403 for mounting the electric push rod 402. The bottom of the mounting frame 403 is fixed with a hollow tube 404. The electric push rod 402 is fixed in the mounting frame 403 by screws. The telescopic end of the electric push rod 402 extends into the hollow tube 404 and is equipped with a drive structure 405.

[0027] The fixing rod 401 is inserted vertically into the center inner hole of the collet 6. Its diameter is smaller than the inner diameter of the cone end of the collet 6, ensuring that the collet 6 can be smoothly inserted and initially positioned.

[0028] The limiting structure 4 also includes a mounting base 406 fixed to the bottom end of the hollow tube 404 and two sets of limiting rods 407 disposed in the mounting base 406. The mounting base 406 is door-shaped, and one end of the two sets of limiting rods 407 is rotatably connected to the mounting base 406 through a rotating shaft. The two sets of limiting rods 407 are V-shaped.

[0029] The drive structure 405 includes a rack 4051 fixed to one end of the electric push rod 402, and gears 4052 are fixed to the outer walls of both sets of rotating shafts. The two sides of the rack 4051 mesh with the two sets of gears 4052 respectively.

[0030] When the limiting structure 4 is in the limiting state, such as Figure 3 As shown, the two limiting rods 407 are V-shaped, forming a support bracket that is slightly larger than the maximum outer diameter of the cone end of the collet 6;

[0031] When the limiting structure 4 is in the released state: the electric push rod 402 retracts, driving the rack 4051 to move upward. At this time, the rack 4051 drives the gear 4052 to rotate, causing the two sets of limiting rods 407 to swing downward until the V-shaped opening faces downward and the diameter is smaller than the inner diameter of the collet 6. The collet 6 loses its lower support point and falls into the slide rail 504 under the action of gravity, thus realizing the release.

[0032] The hanging bracket 3 is provided with several sets, and each hanging bracket 3 has several sets of limiting structures 4 arranged linearly and equidistantly.

[0033] The two ends of the receiving frame 5 are fixed to the hanging frame 3 with screws. The bottom of the receiving frame 5 is open, and a wire mesh 501 is fixed to the open bottom end of the receiving frame 5. The wire mesh 501 allows nitrogen gas to flow freely upward or downward, fully contacting the inner wall of the collet 6, while effectively supporting the collet 6 as it falls in, preventing it from falling directly.

[0034] The outer wall of the receiving frame 5 is fixed with a perimeter 502 to prevent the collet 6 from detaching from the receiving frame 5 after release. One side of one of the perimeters 502 is fixed with a slide rail 504 to guide the collet 6 when it is released. The slide rail 504 is arc-shaped. When the collet 6 is released from the limiting structure 4, it will first fall onto this slide rail 504. The arc design of the slide rail 504 guides the falling collet 6, guiding it to lie horizontally on the wire mesh 501, ensuring that the inner hole is fully exposed. The top of the hanger 2 is riveted with a lifting ring 503 to facilitate the hoisting of the hanger 2.

[0035] The outer wall of the receiving frame 5 is equipped with a retaining edge 502 to prevent the released collets 6 from accidentally popping out of the receiving frame 5 during falling or rolling, ensuring that all collets 6 can be safely received. The lifting eye 503 is riveted to the highest point of the top of the lifting frame 2, providing a safe and reliable connection point for cranes, overhead cranes, or other lifting equipment.

[0036] When in use, the worker puts the collet 6 onto the fixing rod 401 of the hanger 3 in sequence. The electric push rod 402 extends and drives the rack 4051 to move downward. At this time, the rack 4051 drives the gear 4052 to rotate, causing the two sets of limiting rods 407 to swing upward until the V-shaped opening faces upward and the diameter is larger than the outer diameter of the collet 6. The cone end of the collet 6 falls on the limiting rods 407 that form the V-shape and is in a suspended state.

[0037] In the nitrogen atmosphere of the nitriding furnace 1, the conical surface and elastic groove of the collet 6 are fully nitrided. The structure of the nitriding furnace 1 is the same as that of the prior art and will not be described in detail here.

[0038] After the outer surface is nitrided according to the preset time, the electric push rod 402 retracts and drives the rack 4051 to move upward. At this time, the rack 4051 drives the gear 4052 to rotate, causing the two sets of limit rods 407 to swing downward until the V-shaped opening faces downward and the diameter is smaller than the inner diameter of the collet 6. The collet 6 loses its support point below and falls into the slide rail 504 under the action of gravity, thus releasing the collet.

[0039] The slide rail 504 guides the collet 6 to roll smoothly into the receiving frame 5 below. The collet 6 lies horizontally on the wire mesh 501, with the central inner hole fully exposed to nitrogen gas. The inner hole wall is fully nitrided. After the entire processing cycle is completed, the hanger 2 is lifted out of the nitriding furnace 1.

[0040] Compared to the traditional positioning insertion clamp 6, this external surface treatment device can divide the nitriding process into two stages, improving the comprehensiveness of surface nitriding, and can complete it in one go in the nitriding furnace 1 without manual intervention.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface treatment apparatus for collet production, characterized in that: The equipment includes a nitriding furnace (1) and a hanger (2) that is hoisted into the inner cavity of the nitriding furnace (1). The hanger (2) has several sets of hanging racks (3) for hanging the collet (6). The hanging rack (3) is provided with a limiting structure (4) that can restrict the collet (6) to a hanging state and automatically release the collet (6) after the outer surface of the collet (6) is nitrided. Below the limiting structure (4) is a receiving rack (5) for receiving the released collet (6) and nitriding the inner hole of the center of the collet (6).

2. The surface treatment apparatus for collet production according to claim 1, characterized in that: The limiting structure (4) includes a fixing rod (401) fixed to the top of the hanger (3) and an electric push rod (402) with a diameter smaller than the inner diameter of the cone end of the collet (6). The fixing rod (401) is inserted into the collet (6). The bottom of the fixing rod (401) is fixed with a mounting frame (403) for mounting the electric push rod (402). The bottom of the mounting frame (403) is fixed with a hollow tube (404). The electric push rod (402) is fixed in the mounting frame (403) by screws. The telescopic end of the electric push rod (402) extends into the hollow tube (404) and is equipped with a drive structure (405).

3. The surface treatment apparatus for collet production according to claim 2, characterized in that: The limiting structure (4) also includes a mounting base (406) fixed at the bottom end of the hollow tube (404) and two sets of limiting rods (407) arranged in the mounting base (406). The mounting base (406) is arranged in a door shape, and one end of the two sets of limiting rods (407) is rotatably connected in the mounting base (406) through a rotating shaft. The two sets of limiting rods (407) are arranged in a V shape.

4. The surface treatment apparatus for collet production according to claim 3, characterized in that: The drive structure (405) includes a rack (4051) fixed to one end of the electric push rod (402), and gears (4052) are fixed on the outer walls of both sets of rotating shafts. The rack (4051) meshes with the two sets of gears (4052) on both sides respectively.

5. The surface treatment apparatus for collet production according to claim 4, characterized in that: The hanging bracket (3) is provided with several sets, and each hanging bracket (3) has several sets of limiting structures (4) arranged linearly and equidistantly.

6. The surface treatment apparatus for collet production according to claim 1, characterized in that: The two ends of the receiving frame (5) are fixed to the hanging frame (3) by screws. The bottom of the receiving frame (5) is open. A wire mesh (501) is fixed to the open bottom end of the receiving frame (5).

7. The surface treatment apparatus for collet production according to claim 6, characterized in that: The outer wall of the receiving frame (5) is fixed with a perimeter (502) to prevent the collet (6) from detaching from the receiving frame (5) after release. One side of the perimeter (502) is fixed with a slide rail (504) to guide the collet (6) when it is released. The slide rail (504) is arc-shaped. The top of the hanger (2) is riveted with a lifting ring (503) to facilitate the hoisting of the hanger (2).

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