Vacuum furnace for heat treatment of metal workpieces

Abstract

The utility model discloses a kind of vacuum furnace for metal workpiece heat treatment, comprising: vacuum furnace, the bottom fixed mounting of vacuum furnace has base, the vacuum furnace side is provided with furnace cover, the vacuum furnace inside is provided with sliding frame, the sliding frame inner wall is fixedly installed with sleeve, the screw rod is sleeved in the sleeve interior, heating unit, the heating unit is placed above base, the heating unit includes first bevel gear, second bevel gear and third bevel gear, for the workpiece of clamping and heating mechanism positive and negative reversal, workpiece can be evenly heated, avoid temperature gradient, take and place unit, the take and place unit is placed above base, the take and place unit includes bolt and elastic sheet, under its restriction, furnace cover and vacuum furnace can be quickly separated, under the restriction of elastic sheet, sliding frame can be quickly removed from the inside of vacuum furnace.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology for metal workpieces, and in particular to a vacuum furnace for heat treatment of metal workpieces. Background Technology

[0002] Metal workpieces refer to components or finished products made from metal materials through one or more processing techniques such as casting, forging, stamping, cutting, welding, and powder metallurgy. They have specific shapes, sizes, and functions and are used in various types of machinery, equipment, devices, or structures. Vacuum furnaces for heat treatment of metal workpieces are industrial equipment that heat-treats metal workpieces in a vacuum environment. By creating specific vacuum conditions and precisely controlling process parameters such as temperature, heating and cooling rates, and holding time, various heat treatment processes such as annealing, quenching, tempering, carburizing, and brazing can be achieved on metal workpieces.

[0003] Existing vacuum furnaces for heat treatment of metal workpieces are not suitable for uniform heating of metal workpieces, resulting in uneven heat treatment and the occurrence of temperature gradients.

[0004] Therefore, a vacuum furnace for heat treatment of metal workpieces is needed to solve the above problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the above-mentioned problems with vacuum furnaces for heat treatment of metal workpieces, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a vacuum furnace for heat treatment of metal workpieces, which solves the problem that "existing vacuum furnaces for heat treatment of metal workpieces are inconvenient to heat metal workpieces uniformly during use, resulting in uneven heat treatment of metal workpieces and easy occurrence of temperature gradient phenomena".

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vacuum furnace for heat treatment of metal workpieces, comprising:

[0009] A vacuum furnace, wherein a base is fixedly installed at the bottom of the vacuum furnace, a furnace cover is provided on the side of the vacuum furnace, a sliding frame is provided inside the vacuum furnace, a sleeve is fixedly installed on the inner wall of the sliding frame, and a screw is sleeved inside the sleeve;

[0010] The heating unit is placed above the base and includes a first bevel gear, a second bevel gear and a third bevel gear. It is used to make the clamped workpiece and the heating mechanism rotate in opposite directions so that the workpiece can be heated evenly and temperature gradients can be avoided.

[0011] The pick-and-place unit is located above the base. The pick-and-place unit includes a pin and an elastic sheet. Under the restriction of the pin, the furnace cover can be quickly separated from the vacuum furnace. Under the restriction of the elastic sheet, the sliding frame can be quickly removed from the inside of the vacuum furnace.

[0012] As a preferred embodiment of the vacuum furnace for heat treatment of metal workpieces according to the present invention, the heating unit includes a support plate fixedly installed on the outer wall of the vacuum furnace, a motor fixedly installed at the bottom of the support plate, a rotating column fixedly installed at the output end of the motor, a first bevel gear fixedly installed at the end of the rotating column, a second bevel gear meshing with the outer wall of the first bevel gear, a rotating rod fixedly installed inside the second bevel gear, and a rotating frame fixedly installed at the end of the rotating rod.

[0013] In a preferred embodiment of the vacuum furnace for heat treatment of metal workpieces described in this utility model, a third bevel gear is meshed with the first bevel gear on the side away from the second bevel gear, a rotating sleeve is fixedly installed inside the third bevel gear, a rotating frame is fixedly installed on the outer wall of the rotating sleeve, and a heating mechanism is fixedly installed on the side wall of the rotating frame.

[0014] As a preferred embodiment of the vacuum furnace for heat treatment of metal workpieces described in this utility model, the inner side of the rotating frame is slidably disposed with the outer wall of the sliding frame, and the rotating frame is U-shaped. Under the restriction of the rotating frame, the sliding frame can be restricted inside the vacuum furnace, and the U-shaped rotating frame can quickly pick up and put down workpieces.

[0015] In a preferred embodiment of the vacuum furnace for heat treatment of metal workpieces described in this utility model, the inner side of the rotating sleeve is rotatably connected to the outer wall of the rotating rod, the outer wall of the rotating sleeve is rotatably connected to the inside of the vacuum furnace, and the rotating sleeve and the rotating rod rotate in opposite directions. Under these constraints, the workpiece can be heat-treated uniformly.

[0016] As a preferred embodiment of the vacuum furnace for heat treatment of metal workpieces according to the present invention, the following features: a pick-and-place unit, the pick-and-place unit includes a fixing block fixedly installed on the outer wall of the furnace cover, a pin sleeved inside the fixing block, an elastic piece provided below the pin, a connecting block fixedly installed on the outer wall of the furnace cover, a sliding rod fixedly installed on the side wall of the connecting block, and a sleeve block slidably provided on the outer wall of the sliding rod.

[0017] As a preferred embodiment of the vacuum furnace for heat treatment of metal workpieces described in this utility model, the outer wall of the sleeve block is fixedly installed with the outer wall of the vacuum furnace, and there are two sliding rods symmetrically distributed around the center line of the vacuum furnace. Under the sliding restriction of the sliding rods and the sleeve block, the furnace cover can be stably moved towards the vacuum furnace.

[0018] In a preferred embodiment of the vacuum furnace for heat treatment of metal workpieces described in this utility model, the outer wall of the pin is inserted into the interior of the vacuum furnace, and the elastic plate is fixedly installed on the inner side of the rotating frame. Under the restriction of the pin, the furnace cover and the vacuum furnace can be closed, and under the restriction of the elastic plate, the sliding frame can be stably restricted to the inner side of the rotating frame.

[0019] The beneficial effects of this utility model are as follows: When heat treating metal workpieces, in order to achieve uniform heating and avoid temperature gradients, the workpiece can be placed in the sliding frame, the screw can be rotated, and the workpiece can be clamped by the sleeve to slide the sliding frame into the rotating frame. The elastic sheet can prevent it from sliding outward. After starting the heating mechanism, the motor can be started. The rotating column drives the first bevel gear to rotate, which in turn causes the meshing second bevel gear to drive the rotating rod to rotate, making the rotating frame and the sliding frame rotate. At the same time, the first bevel gear drives the third bevel gear to rotate, so that the rotating sleeve and the rotating frame drive the heating mechanism to rotate in the opposite direction, ensuring that the workpiece is heated evenly and improving the heat treatment effect.

[0020] During heat treatment, pull out the pin, pull the furnace cover to make the connecting block drive the slide rod to slide inside the sleeve block, push the slide frame into the rotating frame, the elastic sheet will recover after being compressed and deformed, which can limit the slide frame, push the furnace cover and insert the pin to fix it, and then the vacuum furnace can be closed for heat treatment. If the sleeve and screw sleeve are affected, the slide frame can be replaced periodically, and the independent slide frame is convenient for the workpiece to be picked up and put down. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the main structure of a vacuum furnace for heat treatment of metal workpieces according to the present invention.

[0023] Figure 2 This is a schematic diagram of the heating unit and the loading / unloading unit of a vacuum furnace for heat treatment of metal workpieces according to this utility model.

[0024] Figure 3 This is a schematic diagram of the heating unit structure of a vacuum furnace for heat treatment of metal workpieces according to the present invention.

[0025] Figure 4This is a schematic diagram of the exploded structure of the heating unit of a vacuum furnace for heat treatment of metal workpieces according to the present invention.

[0026] Figure 5 This is a schematic diagram of the loading and unloading unit structure of a vacuum furnace for heat treatment of metal workpieces according to the present invention.

[0027] Figure 6 This is an exploded structural diagram of the loading and unloading unit of a vacuum furnace for heat treatment of metal workpieces according to this utility model.

[0028] Figure Descriptions: 100, Vacuum furnace; 101, Base; 102, Furnace lid; 103, Sliding frame; 104, Sleeve body; 105, Screw; 200, Heating unit; 300, Loading / unloading unit; 201, Support plate; 202, Motor; 203, Rotating column; 204, First bevel gear; 205, Second bevel gear; 206, Rotating rod; 207, Rotating frame; 208, Third bevel gear; 209, Rotating sleeve; 210, Rotating frame; 211, Heating mechanism; 301, Fixing block; 302, Pin; 303, Elastic sheet; 304, Connecting block; 305, Sliding rod; 306, Sleeve block. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0032] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0033] Example 1

[0034] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a vacuum furnace for heat treatment of metal workpieces, comprising:

[0035] A vacuum furnace 100 has a base 101 fixedly installed at the bottom, a furnace cover 102 provided on the side of the vacuum furnace 100, a sliding frame 103 provided inside the vacuum furnace 100, a sleeve 104 fixedly installed on the inner wall of the sliding frame 103, and a screw 105 sleeved inside the sleeve 104.

[0036] The heating unit 200 is placed above the base 101. The heating unit 200 includes a first bevel gear 204, a second bevel gear 205 and a third bevel gear 208, which are used to make the clamped workpiece and the heating mechanism 211 rotate in opposite directions so that the workpiece can be heated evenly and temperature gradients can be avoided.

[0037] The pick-and-place unit 300 is placed above the base 101. The pick-and-place unit 300 includes a pin 302 and an elastic sheet 303. Under the restriction of the pin, the furnace cover 102 can be quickly separated from the vacuum furnace 100. Under the restriction of the elastic sheet 303, the sliding frame 103 can be quickly removed from the inside of the vacuum furnace 100.

[0038] In use, when heat treating a metal workpiece, it is placed between the slide frames 103. The workpiece can be clamped by the sleeve 104 and the screw 105. Under the constraint of the vacuum furnace 100, the metal workpiece can be heat treated. Under the constraint of the heating unit 200, the workpiece can be heated evenly.

[0039] Example 2

[0040] Reference Figure 3 and Figure 4 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment is further optimized based on the above embodiment, as follows:

[0041] The heating unit 200 includes a support plate 201 fixedly installed on the outer wall of the vacuum furnace 100. A motor 202 is fixedly installed at the bottom of the support plate 201. A rotating column 203 is fixedly installed at the output end of the motor 202. A first bevel gear 204 is fixedly installed at the end of the rotating column 203. A second bevel gear 205 meshes with the outer wall of the first bevel gear 204. A rotating rod 206 is fixedly installed inside the second bevel gear 205. A rotating frame 207 is fixedly installed at the end of the rotating rod 206. A third bevel gear 208 meshes with the first bevel gear 204 on the side away from the second bevel gear 205. A rotating sleeve 209 is fixedly installed inside the third bevel gear 208. A rotating frame 210 is fixedly installed on the outer wall of the rotating sleeve 209. A heating mechanism 211 is fixedly installed on the side wall of the rotating frame 210.

[0042] The inner side of the rotating frame 207 is slidably disposed with the outer wall of the sliding frame 103. The rotating frame 207 is U-shaped. Under the restriction of the rotating frame 207, the sliding frame 103 can be restricted inside the vacuum furnace 100. The U-shaped rotating frame 207 can quickly pick up and put down workpieces.

[0043] The rotating sleeve 209 is rotatably connected to the outer wall of the rotating rod 206, and the outer wall of the rotating sleeve 209 is rotatably connected to the inside of the vacuum furnace 100. The rotating sleeve 209 and the rotating rod 206 rotate in opposite directions, and under their constraints, the workpiece can be heat-treated uniformly.

[0044] When using this device, to ensure uniform heating of the metal workpiece during heat treatment, a temperature gradient must be avoided. The workpiece is placed inside the slide frame 103, and the screw 105 is rotated. Under the constraint of the sleeve 104, the workpiece is clamped, and the slide frame 103 is slid into the rotating frame 207. Under the constraint of the elastic sheet 303, the slide frame 103 is prevented from sliding outwards from the rotating frame 207. The heating mechanism 211 is then activated to heat treat the workpiece. At this time, the motor 202 is started, and the rotating column 203, fixedly mounted at its output end, rotates accordingly. The rotating column 203 drives the fixed end of the motor... The first bevel gear 204 rotates accordingly, which drives the second bevel gear 205 meshing with it to rotate as well. The second bevel gear 205 drives the rotating rod 206 to rotate, and the rotating frame 207 fixedly installed at the end of the rotating rod 206 drives the sliding frame 103 to rotate. When the first bevel gear 204 rotates, it drives the third bevel gear 208 meshing with it to rotate. The third bevel gear 208 drives the rotating sleeve 209 and the rotating frame 210 to rotate, so that the heating mechanism 211 and the rotating frame 207 rotate in both directions, so that the workpiece is heated evenly to improve the heat treatment effect.

[0045] Example 3

[0046] Reference Figure 5 and Figure 6 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment is further optimized based on the above embodiments, as detailed below:

[0047] The pick-and-place unit 300 includes a fixing block 301 fixedly installed on the outer wall of the furnace cover 102. A pin 302 is sleeved inside the fixing block 301. An elastic piece 303 is provided below the pin 302. A connecting block 304 is fixedly installed on the outer wall of the furnace cover 102. A sliding rod 305 is fixedly installed on the side wall of the connecting block 304. A sleeve block 306 is slidably provided on the outer wall of the sliding rod 305.

[0048] Among them, the outer wall of the sleeve block 306 is fixedly installed on the outer wall of the vacuum furnace 100, and there are two sliding rods 305, which are symmetrically distributed around the center line of the vacuum furnace 100. Under the sliding restriction of the sliding rods 305 and the sleeve block 306, the furnace cover 102 can be stably moved towards the vacuum furnace 100.

[0049] The outer wall of the pin 302 is inserted into the interior of the vacuum furnace 100, and the elastic plate 303 is fixedly installed on the inner side of the rotating frame 207. Under the restriction of the pin 302, the furnace cover 102 and the vacuum furnace 100 can be closed. Under the restriction of the elastic plate 303, the sliding frame 103 can be stably restricted to the inner side of the rotating frame 207.

[0050] In use, when heat treating metal workpieces, the pin 302 is pulled out from the fixed block 301 and the inside of the vacuum furnace 100, and the furnace cover 102 is pulled. This causes the connecting block 304, which is fixedly installed on the outer wall of the furnace cover 102, to drive the slide rod 305 to slide inside the sleeve block 306. At this time, the slide frame 103 is pushed into the rotating frame 207. The elastic plate 303 is squeezed by the outer wall of the slide frame 103 and deforms into the rotating frame 207. After the slide frame 103 and the rotating frame 207 are installed, the elastic plate 303 is no longer squeezed. Pressing it back to its original state can restrict the sliding frame 103 inside the rotating frame 207, push the furnace cover 102 towards the vacuum furnace 100, and then fit the pin 302 with the fixing block 301 and the vacuum furnace 100 to close the vacuum furnace 100 for heat treatment of the workpiece. During heat treatment, the fitting of the sleeve 104 and the screw 105 will be restricted. However, as long as the sliding frame 103 is replaced periodically, it will not affect the heat treatment of the workpiece. Moreover, the independent sliding frame 103 makes it more convenient to pick up and put down the workpiece.

[0051] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0052] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine task in design, manufacturing, and production without requiring extensive experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum furnace for heat treatment of metal workpieces, characterized in that, include: A vacuum furnace (100) is provided with a base (101) fixedly installed at the bottom of the vacuum furnace (100), a furnace cover (102) is provided on the side of the vacuum furnace (100), a sliding frame (103) is provided inside the vacuum furnace (100), a sleeve (104) is fixedly installed on the inner wall of the sliding frame (103), and a screw (105) is sleeved inside the sleeve (104); Heating unit (200) is placed above base (101). The heating unit (200) includes a first bevel gear (204), a second bevel gear (205) and a third bevel gear (208), which are used to make the clamped workpiece rotate in the forward and reverse directions with the heating mechanism (211) so that the workpiece can be heated evenly and avoid temperature gradients. The pick-and-place unit (300) is placed above the base (101). The pick-and-place unit (300) includes a pin (302) and an elastic sheet (303). Under the restriction of the pin, the furnace cover (102) can be quickly separated from the vacuum furnace (100). Under the restriction of the elastic sheet (303), the sliding frame (103) can be quickly removed from the inside of the vacuum furnace (100).

2. The vacuum furnace for heat treatment of metal workpieces according to claim 1, characterized in that: The heating unit (200) includes a support plate (201) fixedly installed on the outer wall of the vacuum furnace (100). A motor (202) is fixedly installed at the bottom of the support plate (201). A rotating column (203) is fixedly installed at the output end of the motor (202). A first bevel gear (204) is fixedly installed at the end of the rotating column (203). A second bevel gear (205) meshes with the outer wall of the first bevel gear (204). A rotating rod (206) is fixedly installed inside the second bevel gear (205). A rotating frame (207) is fixedly installed at the end of the rotating rod (206).

3. The vacuum furnace for heat treatment of metal workpieces according to claim 2, characterized in that: The first bevel gear (204) is meshed with a third bevel gear (208) on the side away from the second bevel gear (205). A rotating sleeve (209) is fixedly installed inside the third bevel gear (208). A rotating frame (210) is fixedly installed on the outer wall of the rotating sleeve (209). A heating mechanism (211) is fixedly installed on the side wall of the rotating frame (210).

4. The vacuum furnace for heat treatment of metal workpieces according to claim 2, characterized in that: The inner side of the rotating frame (207) is slidably disposed with the outer wall of the sliding frame (103), and the rotating frame (207) is U-shaped.

5. The vacuum furnace for heat treating a metal workpiece according to claim 3, wherein: The inside of the rotating sleeve (209) is rotatably connected to the outer wall of the rotating rod (206), and the outer wall of the rotating sleeve (209) is rotatably connected to the inside of the vacuum furnace (100). The rotating sleeve (209) and the rotating rod (206) rotate in opposite directions.

6. The vacuum furnace for heat treating a metal workpiece of claim 1 wherein: The picking and placing unit (300) includes a fixing block (301) fixedly installed on the outer wall of the furnace cover (102), a pin (302) is sleeved inside the fixing block (301), an elastic piece (303) is provided below the pin (302), a connecting block (304) is fixedly installed on the outer wall of the furnace cover (102), a sliding rod (305) is fixedly installed on the side wall of the connecting block (304), and a sleeve block (306) is slidably arranged on the outer wall of the sliding rod (305).

7. The vacuum furnace for heat treatment of metal workpieces according to claim 6, characterized in that: The outer wall of the sleeve block (306) is fixedly installed on the outer wall of the vacuum furnace (100), and there are two slide rods (305) symmetrically distributed around the center line of the vacuum furnace (100).

8. The vacuum furnace for heat treating a metal workpiece according to claim 6, wherein: The outer wall of the pin (302) is inserted into the interior of the vacuum furnace (100), and the elastic sheet (303) is fixedly installed on the inner side of the rotating frame (207).

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