Quenching tool for hoisting long-strip-shaped workpiece

Abstract

The quenching tool is characterized in that a plurality of workpiece fixing blocks are arranged on two vertically-spaced positioning plates in the vertical direction of a stand column, and fasteners are arranged on the workpiece fixing blocks; the workpiece fixing blocks of the upper positioning plate are in one-to-one correspondence with the workpiece fixing blocks of the lower positioning plate; the furnace mouth supporting arm is connected with the top of the stand column, and a hanging ring is arranged on the top. The bottom plate is connected to the bottoms of the stand columns. When the tool is used, the whole tool can be placed on the ground through the bottom plate, a long-strip-shaped workpiece can be conveniently positioned, and then the two ends of the long-strip-shaped workpiece can be fixed through the workpiece fixing blocks and the fasteners on the upper positioning plate and the lower positioning plate, so that the position of the long-strip-shaped workpiece in the up-down, left-right and front-back directions is limited; the deformation in the heat treatment process is limited within a certain range; in addition, the amplitude jitter caused by movement is avoided in the process of entering and exiting from the furnace mouth, so that the subsequent machining allowance is ensured, and the Brinell hardness detection is convenient; the hanging rings are connected with workpieces at intervals, and cutting operation is omitted.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece heat treatment, and in particular to a quenching tool for hoisting long workpieces. Background Art

[0002] During the heat treatment process of the current equipment, the workpiece needs to be transferred to the pit type resistance furnace, oil tank, and water tank many times. In the above process, the clamping and positioning of the workpiece during the heat treatment process relies on welding a lifting ring on the end of the workpiece, using the lifting ring to assist the workpiece to be suspended in the pit type furnace, or using the lifting ring for transfer, but there are the following problems:

[0003] (1) When heating in a pit-type resistance furnace, since only the lifting ring is suspended in the inner furnace without other positioning and clamping, uncontrollable deformation will occur during the heating process, resulting in a reduction in the margin during subsequent machining; in the process of leaving the pit-type resistance furnace, due to the up and down movement, the long workpiece will have amplitude jitter in the left and right directions, which is not convenient for leaving the furnace.

[0004] (2) When the workpiece is cooled in the quenching medium, it is only suspended by a ring without other positioning and clamping. When it enters the quenching medium, the inconsistent order leads to uneven cooling speed and causes severe deformation, resulting in severe deformation after quenching. This is especially obvious for long workpieces. This affects the subsequent machining and hardness measurement, reducing the qualified rate of the workpiece.

[0005] (3) Since the lifting ring and the workpiece are welded, the lifting ring needs to be cut off from the workpiece later, which is not only time-consuming and labor-intensive, but also makes the processing more difficult. Utility Model Content

[0006] An embodiment of the present application provides a quenching tool for hoisting long workpieces to solve the problem in the related art that during the heat treatment process, long workpieces are only suspended by setting a hanging ring and then heated and quenched without other limiters, resulting in deformation and affecting subsequent processing and hardness measurement.

[0007] In a first aspect, a quenching tool for hoisting a long workpiece is provided, comprising:

[0008] The column is vertically provided with two positioning plates spaced apart from each other, the positioning plates are provided with a plurality of workpiece fixing blocks, and the workpiece fixing blocks are provided with fasteners; the workpiece fixing blocks of the upper positioning plate correspond one to one with the workpiece fixing blocks of the lower positioning plate;

[0009] A furnace mouth support arm, which is detachably connected to the top of the column and has a lifting ring on the top;

[0010] A base plate is connected to the bottom of the column.

[0011] In some embodiments, the workpiece fixing block is provided on the top surface of the positioning plate and at a position on the outer side of the positioning plate;

[0012] In the radial direction of the column, a side surface of the workpiece fixing block away from the column is flush with a vertical side surface of the positioning plate.

[0013] In some embodiments, the workpiece fixing block is connected to the vertical side surface of the positioning plate.

[0014] In some embodiments, the workpiece fixing block on the upper positioning plate is mounted on the bottom surface of the upper positioning plate; and the workpiece fixing block on the lower positioning plate is mounted on the top surface of the lower positioning plate.

[0015] In some embodiments, the workpiece fixing block is provided with a threaded hole;

[0016] The fastener comprises a screw rod, which is connected to a threaded hole. An end of the screw rod away from the threaded hole is provided with a workpiece pressing plate.

[0017] In some embodiments, the fastener includes a horizontal hanging rod, which is fixedly connected to the workpiece fixing block. The horizontal hanging rod is provided with a threaded portion, and a clamping nut is threadedly connected to the threaded portion; a clamping space is formed between the clamping nut and the workpiece fixing block.

[0018] In some embodiments, a plurality of vertical baffles are provided between the two positioning plates, and the plurality of vertical baffles are distributed along the outer contour of the positioning plates; in the radial direction of the column, the side surface of the vertical baffle away from the column is flush with the outer side surface of the positioning plate.

[0019] In some embodiments, a vertical retaining cylinder is provided between the two positioning plates. In the radial direction of the column, the side surface of the vertical retaining cylinder away from the column is flush with the outer side surface of the positioning plate. A radial support rod is provided between the vertical retaining cylinder and the column.

[0020] In some embodiments, a reinforcing rib connected to the column is provided at the bottom of the positioning plate.

[0021] In some embodiments, a latch hole is provided on the outer side of the top of the column; a column slot is provided inside the furnace mouth support arm, and a radial hole communicating with the column slot is further provided on the furnace mouth support arm; a latch is provided in the radial hole; the latch passes through the radial hole and is plugged into the latch hole;

[0022] A vertical anti-sliding block is also provided on the column, and the top of the vertical anti-sliding block contacts the bottom surface of the furnace mouth support arm.

[0023] The beneficial effects of the technical solution provided by this application include:

[0024] The embodiment of the present application provides a quenching tool for hoisting long workpieces. Since two positioning plates spaced apart from each other are vertically provided on the column, a plurality of workpiece fixing blocks are provided on the positioning plates, and fasteners are provided on the workpiece fixing blocks; the workpiece fixing blocks of the upper positioning plate correspond one-to-one to the workpiece fixing blocks of the lower positioning plate; the furnace mouth support arm is detachably connected to the top of the column, and a lifting ring is provided on the top of the column; the bottom plate is connected to the bottom of the column; when in use, the entire tool can be placed on the ground through the bottom plate, which is convenient for positioning the long workpiece, and then the long workpiece can be fixed at both ends by the workpiece fixing blocks and fasteners on the upper and lower positioning plates, thereby limiting its position in the upper, lower, left and right directions. In addition, the positioning plates and workpiece fixing blocks provide radial support to limit the position in the front and back directions, limiting the deformation during the heat treatment process to a certain range, and no amplitude jitter will occur due to movement during the process of entering and exiting the furnace mouth, which not only ensures the subsequent machining allowance, but also, the smaller deformation makes the hardness test value more accurate when performing Brinell hardness testing, that is, a circular pit can be better punched, which is convenient for observing the pit diameter and performing hardness conversion. In addition, the connection between the lifting ring and the furnace mouth support arm is needed to facilitate transportation, avoid direct welding with the workpiece, and cancel subsequent cutting operations. The furnace mouth support arm is in contact with the furnace mouth of the pit-type resistance furnace, so that the tooling is stably positioned in the pit-type resistance furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A front view of a quenching tool for hoisting a long workpiece provided in an embodiment of the present application;

[0027] Figure 2 A side view of a quenching tool for hoisting a long workpiece provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram comparing the connection of long and short workpieces when the workpiece fixing block provided by the embodiment of the present application is flush with the positioning plate;

[0029] Figure 4 A schematic diagram comparing the connection of long and short workpieces when the workpiece fixing block provided by an embodiment of the present application is connected to the side of the positioning plate;

[0030] Figure 5 A schematic diagram comparing two structures of fasteners provided in an embodiment of the present application;

[0031] Figure 6A schematic diagram of the connection between the furnace mouth support arm and the column provided in an embodiment of the present application.

[0032] In the figure: 1. Column; 2. Positioning plate; 3. Workpiece fixing block; 4. Furnace mouth support arm; 5. Lifting ring; 6. Bottom plate; 7. Reinforcement rib; 8. Vertical anti-sliding block. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] During the heat treatment process, the workpiece needs to be transferred to the pit type resistance furnace, oil tank, and water tank many times. In the above process, the clamping and positioning of the workpiece during the heat treatment process depends on welding a lifting ring on the end of the workpiece, using the lifting ring to assist the workpiece to be suspended in the pit type furnace, or using the lifting ring for transfer, but there are the following problems:

[0035] (1) When heating in a pit-type resistance furnace, since only the lifting ring is suspended in the inner furnace without other positioning and clamping, uncontrollable deformation will occur during the heating process, resulting in a reduction in the margin during subsequent machining; in the process of leaving the pit-type resistance furnace, due to the up and down movement, the long workpiece will have amplitude jitter in the left and right directions, which is not convenient for leaving the furnace.

[0036] (2) When the workpiece is cooled in the quenching medium, it is only suspended by a ring without other positioning and clamping. When it enters the quenching medium, the inconsistent order leads to uneven cooling speed and causes severe deformation, resulting in severe deformation after quenching. This is especially obvious for long workpieces. This affects the subsequent machining and hardness measurement, reducing the qualified rate of the workpiece.

[0037] (3) Since the lifting ring and the workpiece are welded, the lifting ring needs to be cut off from the workpiece later, which is not only time-consuming and labor-intensive, but also makes the processing more difficult.

[0038] An embodiment of the present application provides a quenching tool for hoisting long workpieces to solve the problem in the related art that during the heat treatment process, long workpieces are only suspended by setting a hanging ring and then heated and quenched without other limiters, resulting in deformation and affecting subsequent processing and hardness measurement.

[0039] See also Figure 1-Figure 2 , a quenching tool for hoisting long workpieces, comprising:

[0040] The column 1 is vertically provided with two positioning plates 2 spaced apart from each other, and a plurality of workpiece fixing blocks 3 are provided on the positioning plates 2, and fasteners are provided on the workpiece fixing blocks 3; the workpiece fixing blocks 3 of the upper positioning plate 2 correspond one to one with the workpiece fixing blocks 3 of the lower positioning plate 2;

[0041] A furnace mouth support arm 4, which is detachably connected to the top of the column 1 and has a lifting ring 5 on its top;

[0042] The bottom plate 6 is connected to the bottom of the column 1 .

[0043] Through the above settings, when in use, first place the entire tooling on the ground with the bottom plate 6 in contact with the ground, which can facilitate the hanging and connection of the long workpiece; connect the two sides of the long workpiece to be hung in the length direction to the workpiece fixing blocks 3 of the two positioning plates 2 respectively, which is equivalent to limiting the two ends of a straight line, and its position will be limited. In addition, the positioning plate 2 and the workpiece fixing block 3 provide radial support to limit the position in the front and back directions, thereby realizing the limitation of the long workpiece in the left, right, up, down, front and back directions, so that the long workpiece can be stably connected on the tooling.

[0044] The workpiece is then connected to the lifting ring 5 via a lifting device, allowing the tooling to be placed above the pit-type resistance furnace. The tooling is then lowered until the furnace mouth support arm 4 contacts the furnace mouth. After heating is complete, the tooling is lifted out of the furnace using the lifting device. During the in-furnace and out-of-furnace processes, vibrations due to movement are eliminated, facilitating removal.

[0045] After coming out of the furnace, the entire tooling containing the long workpiece is placed in the quenching medium for cooling. Since the long workpiece is restricted, the violent deformation caused by the uneven cooling rate due to inconsistent sequence can be limited to a certain range.

[0046] As a result, the position of the long workpiece in the up, down, left, right, front and back directions is limited during the heat treatment process, limiting the deformation during the heat treatment process to a certain range. The amplitude jitter will not occur due to movement during the process of entering and exiting the furnace mouth, which not only ensures the subsequent machining allowance, but also, the smaller deformation makes the hardness test value more accurate during the Brinell hardness test, that is, it can better produce a circular pit, which is convenient for observing the pit diameter and performing hardness conversion. In addition, since the lifting ring 5 is connected to the furnace mouth support arm 4, it needs to be easy to transport to avoid direct welding to the workpiece and cancel the subsequent cutting operation.

[0047] Finally, the use of quenching fixtures for lifting long workpieces solved key problems during the heat treatment of key product parts, such as inconsistent up and down shaking of the workpieces, large deformation caused by uneven heating during the heating process, material loss and manpower and material costs caused by welding and cutting rings. It not only facilitates the movement and lifting of the fixtures and positioning of the workpieces, but also greatly saves manpower and material resources. It has the advantages of a wide range of uses, high production efficiency and excellent product quality.

[0048] In some preferred embodiments, during the use of the quenching fixture for hoisting long workpieces, there are situations where the long workpieces to be fixed have different lengths. Therefore, in order to adapt to long workpieces of different lengths, the following settings are provided:

[0049] The first type is to set a workpiece fixing block 3 on the top surface of the positioning plate 2 and at the outer side of the positioning plate 2; in the radial direction of the column 1, the side of the workpiece fixing block 3 away from the column 1 is flush with the vertical side of the positioning plate 2. Figure 3 As shown, the long workpiece is marked as a.

[0050] The second type is to connect the workpiece fixing block 3 to the vertical side of the positioning plate 2. Figure 4 shown.

[0051] The above two methods do not fix the two top ends of the long workpiece, but fix it from the side of the long workpiece, and will not limit the two top ends of the long workpiece.

[0052] Of course, this application does not exclude the fixing method of limiting the two top end surfaces of the long workpiece. This method is set as follows: the workpiece fixing block 3 on the upper positioning plate 2 is installed on the bottom surface of the upper positioning plate 2; the workpiece fixing block 3 of the lower positioning plate 2 is installed on the top surface of the lower positioning plate 2.

[0053] In some preferred embodiments, reference Figure 5 As shown, the structure of the fastener is described in detail:

[0054] In the first structure, a threaded hole is provided on the workpiece fixing block 3;

[0055] The fastener comprises a screw rod connected to a threaded hole, and a workpiece pressing plate is provided at one end of the screw rod away from the threaded hole.

[0056] In the second structure, the fastener includes a horizontal hanging rod, which is fixedly connected to the workpiece fixing block 3. The horizontal hanging rod is provided with a threaded portion, and a clamping nut is threadedly connected to the threaded portion; a clamping space is formed between the clamping nut and the workpiece fixing block 3.

[0057] In some preferred embodiments, in order to limit the entire long workpiece and prevent deformation in the middle, the following settings are provided:

[0058] The first type is that multiple vertical baffles are provided between the two positioning plates 2, and the multiple vertical baffles are distributed along the outer contour of the positioning plates 2; in the radial direction of the column 1, the side surface of the vertical baffle away from the column 1 is flush with the outer side surface of the positioning plate 2.

[0059] The second type is that a vertical retaining cylinder is provided between the two positioning plates 2. In the radial direction of the column 1, the side surface of the vertical retaining cylinder away from the column 1 is flush with the outer side surface of the positioning plate 2; a radial support rod is provided between the vertical retaining cylinder and the column 1.

[0060] The above further limits the deformation range of the long workpiece during the heat treatment process.

[0061] In some preferred embodiments, in order to prevent the positioning plate 2 from being deformed due to the weight after hanging the long workpiece, the following settings are made:

[0062] The bottom of the positioning plate 2 is provided with a reinforcing rib 7 connected to the column 1, thereby improving the overall structural strength of the positioning plate 2.

[0063] In some preferred embodiments, the following arrangements are made to achieve the installation and connection between the furnace mouth support arm 4 and the column 1:

[0064] A latch hole is provided on the outer side of the top of the column 1; a column slot is provided inside the furnace mouth support arm 4, and a radial hole communicating with the column slot is also provided on the furnace mouth support arm 4; a latch is provided in the radial hole; the latch passes through the radial hole and is plugged into the latch hole;

[0065] A vertical anti-sliding block 8 is also provided on the column 1, and the top of the vertical anti-sliding block 8 contacts the bottom surface of the furnace mouth support arm 4. Figure 6 Of course, this application does not exclude other detachable connection forms, such as threaded connection, etc.

[0066] When the present application is in use, the entire tooling is first placed on the ground with the bottom plate 6 in contact with the ground, which can facilitate the hanging and connection of the long workpiece; the two sides of the long workpiece to be hung in the length direction are respectively connected to the workpiece fixing blocks 3 of the two positioning plates 2, which is equivalent to the two ends of a straight line being limited, and its position will be limited. In addition, the positioning plate 2 and the workpiece fixing block 3 are radially supported to limit the position in the front and back directions, thereby realizing the limitation of the long workpiece in the left, right, up, down, front and back directions, so that the long workpiece is stably connected on the tooling.

[0067] The workpiece is then connected to the lifting ring 5 via a lifting device, allowing the tooling to be placed above the pit-type resistance furnace. The tooling is then lowered until the furnace mouth support arm 4 contacts the furnace mouth. After heating is complete, the tooling is lifted out of the furnace using the lifting device. During the in-furnace and out-of-furnace processes, vibrations due to movement are eliminated, facilitating removal.

[0068] After coming out of the furnace, the entire tooling containing the long workpiece is placed in the quenching medium for cooling. Since the long workpiece is restricted, the violent deformation caused by the uneven cooling rate due to inconsistent sequence can be limited to a certain range.

[0069] As a result, the position of the long workpiece in the up, down, left, right, front and back directions is limited during the heat treatment process, limiting the deformation during the heat treatment process to a certain range. The amplitude jitter will not occur due to movement during the process of entering and exiting the furnace mouth, which not only ensures the subsequent machining allowance, but also, the smaller deformation makes the hardness test value more accurate during the Brinell hardness test, that is, it can better produce a circular pit, which is convenient for observing the pit diameter and performing hardness conversion. In addition, since the lifting ring 5 is connected to the furnace mouth support arm 4, it needs to be easy to transport to avoid direct welding to the workpiece and cancel the subsequent cutting operation.

[0070] Finally, the use of quenching fixtures for lifting long workpieces solved key problems during the heat treatment of key product parts, such as inconsistent up and down shaking of the workpieces, large deformation caused by uneven heating during the heating process, material loss and manpower and material costs caused by welding and cutting rings. It not only facilitates the movement and lifting of the fixtures and positioning of the workpieces, but also greatly saves manpower and material resources. It has the advantages of a wide range of uses, high production efficiency and excellent product quality.

[0071] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0072] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0073] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A quenching tool for hoisting long workpieces, characterized in that: It includes: A column (1) is provided with two positioning plates (2) spaced apart vertically, a plurality of workpiece fixing blocks (3) are provided on the positioning plates (2), and fasteners are provided on the workpiece fixing blocks (3); the workpiece fixing blocks (3) located on the upper positioning plate (2) correspond one to one with the workpiece fixing blocks (3) located on the lower positioning plate (2); A furnace mouth support arm (4), which is detachably connected to the top of the column (1) and has a lifting ring (5) on its top; A bottom plate (6) is connected to the bottom of the column (1).

2. The quenching fixture for hoisting a long workpiece according to claim 1, characterized in that: The workpiece fixing block (3) is provided on the top surface of the positioning plate (2) and at a position on the outer side of the positioning plate (2); In the radial direction of the column (1), a side surface of the workpiece fixing block (3) away from the column (1) is flush with the vertical side surface of the positioning plate (2).

3. The quenching fixture for hoisting a long workpiece according to claim 1, characterized in that: The workpiece fixing block (3) is connected to the vertical side surface of the positioning plate (2).

4. The quenching fixture for hoisting a long workpiece according to claim 1, characterized in that: The workpiece fixing block (3) on the upper positioning plate (2) is mounted on the bottom surface of the upper positioning plate (2); and the workpiece fixing block (3) on the lower positioning plate (2) is mounted on the top surface of the lower positioning plate (2).

5. The quenching fixture for hoisting a long workpiece according to claim 1, characterized in that: The workpiece fixing block (3) is provided with a threaded hole; The fastener comprises a screw rod, which is connected to a threaded hole. An end of the screw rod away from the threaded hole is provided with a workpiece pressing plate.

6. The quenching fixture for hoisting a long workpiece according to claim 1, characterized in that: The fastener comprises a horizontal hanging rod, which is fixedly connected to the workpiece fixing block (3); a threaded portion is provided on the horizontal hanging rod, and a compression nut is threadedly connected to the threaded portion; a clamping space is formed between the compression nut and the workpiece fixing block (3).

7. The quenching fixture for hoisting a long workpiece according to claim 2, characterized in that: A plurality of vertical baffles are provided between the two positioning plates (2), and the plurality of vertical baffles are distributed along the outer contours of the positioning plates (2); in the radial direction of the column (1), the side surface of the vertical baffle away from the column (1) is flush with the outer side surface of the positioning plate (2).

8. The quenching fixture for hoisting a long workpiece according to claim 2, characterized in that: A vertical retaining cylinder is provided between the two positioning plates (2); in the radial direction of the column (1), the side surface of the vertical retaining cylinder away from the column (1) is flush with the outer side surface of the positioning plate (2); a radial support rod is provided between the vertical retaining cylinder and the column (1).

9. The quenching fixture for hoisting a long workpiece according to claim 1, characterized in that: The bottom of the positioning plate (2) is provided with a reinforcing rib (7) connected to the column (1).

10. The quenching fixture for hoisting a long workpiece according to claim 1, characterized in that: The outer side of the top of the column (1) is provided with a latch hole; the interior of the furnace mouth support arm (4) is provided with a column slot, and the furnace mouth support arm (4) is also provided with a radial hole connected to the column slot; a latch is provided in the radial hole; the latch passes through the radial hole and is plugged into the latch hole; A vertical anti-sliding block (8) is also provided on the upright column (1), and the top of the vertical anti-sliding block (8) contacts the bottom surface of the furnace mouth support arm (4).

Images