Tempering furnace for die steel

Abstract

The tempering furnace for the die steel comprises a furnace body, a supporting seat, a connecting column, a placing frame and an air heater, an opening is formed in the top of the furnace body, a furnace cover for sealing the opening is arranged on the top of the furnace body in a matched mode, the supporting seat is driven by a driver to be rotationally arranged at the bottom in the furnace body, and a connecting groove is formed in the top of the supporting seat; the connecting column is vertically arranged in the furnace body, the top of the connecting column is rotationally connected with the furnace cover through a rotary connecting piece, and the bottom end of the connecting column is in key connection into the connecting groove. The multiple placing frames are arranged on the connecting column in a staggered mode from bottom to top, and each placing frame is provided with a plurality of positioning holes used for placing die steel; a hot air outlet pipe of the air heater is communicated with the inner bottom of the furnace body; compared with the prior art, the die steel tempering device has the following technical effects that multiple pieces of die steel can be subjected to tempering treatment in the cavity at a time, hot air is evenly distributed in the cavity, and the tempering quality of the die steel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tempering furnace structure technical field, concretely relates to a tempering furnace for die steel. BACKGROUND

[0002] Die steel is used to manufacture cold punch mould, hot forging mould, die casting mould and the steel grade of mould. Mould is the main processing tool of the manufacture of parts in mechanical manufacturing, wireless radio instrument, motor, electric appliance and other industrial departments. The quality of mould directly influences the quality of pressure processing technology, the precision yield and production cost of product, and the quality and service life of mould are mainly affected by mould material and heat treatment besides reasonable structure design and processing precision. When carrying out heat treatment, the die steel needs to be tempered by using the tempering furnace.

[0003] The traditional tempering furnace can only process a small amount of die steel at a time in the tempering process, and the die steel is unevenly heated in the tempering furnace. UTILITY MODEL CONTENTS

[0004] In view of the defects in the prior art, the utility model aims at providing a tempering furnace for die steel to solve the problem that only a small amount of die steel can be processed at a time in the prior art, and the die steel is unevenly heated in the tempering furnace.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a tempering furnace for die steel, comprising:

[0006] The furnace body is open at the top and is provided with a furnace cover for sealing the opening.

[0007] The support seat is driven by a drive to rotate and is arranged at the bottom of the furnace body, and a connecting groove is opened at the top of the support seat.

[0008] The connecting column is vertically arranged in the furnace body, and the top of the connecting column is connected with the furnace cover through a rotating connecting piece, and the bottom end of the connecting column is connected with the connecting groove through a key.

[0009] The placing rack is arranged on the connecting column, and a plurality of positioning holes for placing the die steel are arranged on each placing rack.

[0010] The air heater is arranged in the furnace body, and the hot air outlet pipe of the air heater is connected with the bottom of the furnace body.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The mold steel tempering furnace forms a sealed cavity through the cooperation of the furnace body and the furnace cover. There are multiple placement racks and each placement rack has multiple positioning holes, so multiple mold steels can be tempered in the cavity at one time. The air heater provides the required heat for the tempering treatment in the furnace body. During the tempering treatment, the driver drives the support seat to rotate, driving the connecting column to rotate, and the multiple placement racks rotate in the cavity; at the same time, the multiple placement racks are staggered from bottom to top on the connecting column, providing a channel for hot air to flow in the cavity, which is beneficial to the uniform distribution of hot air in the cavity and improves the tempering quality of the mold steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A partial cross-sectional view of an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of the structure of the middle placement rack;

[0015] Figure 3 for Figure 1 A partial enlarged view of part A in the middle.

[0016] The figure marks in the drawings of the specification include: furnace body 1, support base 2, connecting column 3, placement rack 4, air heater 5, furnace cover 6, driver 7, rotating connection 8, fixed column 81, connecting sleeve 82, reinforcement strip 83, positioning hole 9, cylindrical hole section 91, gradual transition hole section 92, limiting shrinkage section 93, annular air distribution pipe 10, air distribution hole 11, first regulating valve 12, air cooler 13, second regulating valve 14. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below through specific implementation methods:

[0018] like Figure 1 As shown, an embodiment of the present invention proposes a tempering furnace for mold steel, comprising a furnace body 1, a support seat 2, a connecting column 3, a placement rack 4 and an air heater 5, wherein the top of the furnace body 1 is open and is provided with a furnace cover 6 for sealing the opening, the support seat 2 is driven by a driver 7 to rotate and is arranged at the bottom of the furnace body 1 and has a connecting groove on its top; the connecting column 3 is vertically arranged in the furnace body 1 and its top is rotatably connected to the furnace cover 6 through a rotating connecting piece 8, and its bottom end is keyed in the connecting groove; there are multiple placement racks 4 and they are staggered from bottom to top on the connecting column 3, and each placement rack 4 is provided with a plurality of positioning holes 9 for placing mold steel; the hot air outlet pipe of the air heater 5 is connected to the bottom of the furnace body 1.

[0019] The mold steel tempering furnace forms a sealed cavity through the cooperation of the furnace body 1 and the furnace cover 6, a plurality of placing racks 4 and a plurality of positioning holes 9 on each placing rack 4, so that a plurality of mold steels can be tempered in the cavity at one time, the air heater 5 provides the required heat for the tempering process in the furnace body 1, and the driver 7 drives the support seat 2 to rotate during the tempering process, and drives the connecting column 3 to rotate, so that the plurality of placing racks 4 rotate in the cavity; meanwhile, the plurality of placing racks 4 are staggered from bottom to top on the connecting column 3, providing a channel for the flow of hot air in the cavity, which is conducive to the uniform distribution of hot air in the cavity and improves the tempering quality of the mold steel.

[0020] In this embodiment, a support frame is further arranged outside the furnace body 1, and a hoisting device (not shown in the drawings) located above the furnace cover 6 is arranged on the support frame. When the furnace cover 6 is opened to move the connecting column 3 out of the furnace body 1 and place the mold steel into the positioning hole 9 or move the mold steel out of the positioning hole 9, the furnace cover 6 is hoisted by the hoisting device to achieve this. The hoisting device is prior art and will not be described in detail here.

[0021] Among them, the connecting column 3 and the connecting groove are connected by spline connection, which is convenient for connection, disassembly and transmission between the connecting column 3 and the support seat 2.

[0022] The driver 7 can be a reduction motor to drive the support seat 2 to rotate slowly.

[0023] And the furnace cover 6 is provided with a smoke exhaust hole, and the smoke generated by impurities during the tempering process of the mold steel in the furnace body 1 is exhausted through the smoke exhaust hole.

[0024] In order to better understand the scheme, the positioning hole 9 and other structures will be further optimized below.

[0025] As shown in Figure 1 and Figure 2 According to another embodiment of the present application, the mold steel tempering furnace comprises a plurality of positioning holes 9, each of which comprises a plurality of cylindrical hole segments 91 arranged from top to bottom and gradually decreasing in diameter, and a limiting neck segment 93 formed at the bottom end of the lowermost cylindrical hole segment 91.

[0026] The positioning hole 9 is embodied in this embodiment, but is not limited thereto.

[0027] The positioning hole 9 is composed of three cylindrical hole sections 91, two gradually changing transition hole sections 92 and one limiting necked hole section 93, wherein the three cylindrical hole sections 91 are used for positioning three different specifications of die steels, and the two gradually changing transition hole sections 92 and the one limiting necked hole section 93 are used for limiting the bottom end of the cylindrical hole section 91 connected above, so that the matched die steel can be stably placed in the corresponding cylindrical hole section 91. The structure design of the positioning hole 9 also facilitates the use of tools to insert from the bottom end of the positioning hole 9 to push the die steel out of the top end of the positioning hole 9 when the die steel is removed from the positioning hole 9, which is relatively convenient during the removal of the die steel.

[0028] It should be noted that only one die steel can be placed in each positioning hole 9 at a time.

[0029] Further, each of the placing racks 4 is a net rack, and the mesh holes on the net rack can be used to uniformly distribute hot air around the die steel placed in the positioning hole 9, which is beneficial to improve the quality of the die steel during the tempering process.

[0030] Specifically, each net rack is semicircular, and an arc-shaped connecting block is fixedly arranged at the middle portion and is fixedly connected to the connecting column 3 by welding; so that the placing rack 4 is stably connected to the connecting column 3, and the channel for the hot air flow in the cavity is large enough to ensure that the hot air in the cavity is uniformly distributed and the temperature in the cavity can meet the required temperature during the tempering process.

[0031] As shown in Figure 1 According to another embodiment of the present application, a kind of die steel is used in tempering furnace, wherein the rotating connecting piece 8 includes fixed column 81 and connecting sleeve 82, the fixed column 81 is fixedly connected with furnace cover 6 and is rotatably connected with the top of connecting column 3, the connecting sleeve 82 is rotatably sleeved on the top side of connecting column 3 and is partially slidably embedded in the annular groove opened along the circumferential direction of the top side of connecting column 3, and connecting sleeve 82 is fixedly connected with furnace cover 6 by a plurality of reinforcing strips 83.

[0032] The connecting column 3 is stably rotatably connected by the fixed column 81, the connecting sleeve 82 and the plurality of reinforcing strips 83, wherein the plurality of reinforcing strips 83 are circumferentially arranged on the outer side of the connecting sleeve 82, so that the connecting column 3 is relatively uniformly stressed during rotation with the support base 2.

[0033] The number of reinforcing strips 83 can be 2, 3, 5 or 6, etc., which can be adjusted according to actual needs.

[0034] As shown in Figure 1 and Figure 3As shown, according to another embodiment of the utility model, the tempering furnace for die steel, wherein the furnace body 1 bottom side is equipped with annular air distribution pipe 10, annular air distribution pipe 10 is communicated with hot air outlet pipe, the furnace body 1 bottom side side wall is equipped with several air distribution holes 11 along its circumferential direction and communicated with annular air distribution pipe 10.

[0035] Here: the air heater 5 is the existing structure, here will not be described in detail; the hot air generated by air heater 5 is introduced into annular air distribution pipe 10 through hot air outlet pipe, and then is uniformly introduced into the inner bottom side of furnace body 1 through several air distribution holes 11.

[0036] Wherein, the air inlet of each air distribution hole 11 and annular air distribution pipe 10 are communicated through connecting pipe.

[0037] In order to make hot air enter the inner bottom side of furnace body 1 and flow quickly in furnace body 1, so that the hot air in furnace body 1 is uniformly distributed, the air outlet section of each air distribution hole 11 is conical and is inclinedly arranged towards the upper side of the inner side of furnace body 1.

[0038] Based on the above scheme:

[0039] The hot air outlet pipe is provided with first regulating valve 12; the furnace body 1 is provided with air cooler 13, and the cold air outlet pipe of air cooler 13 is communicated with annular air distribution pipe 10 and is provided with second regulating valve 14 on the cold air outlet pipe.

[0040] The air cooler 13 is the existing structure, here will not be described in detail.

[0041] When introducing hot air into furnace body 1, open first regulating valve 12, close second regulating valve 14, to introduce the generated hot air into furnace body 1; when the die steel in furnace body 1 is completed tempering treatment, open second regulating valve 14, close first regulating valve 12, air cooler 13 generates cold air and is introduced into annular air distribution pipe 10 through cold air outlet pipe, and then is uniformly introduced into the inner bottom side of furnace body 1 through several air distribution holes 11, and the cold air flows in furnace body 1 to be uniformly distributed, to cool furnace body 1; when the temperature in furnace body 1 is reduced, the furnace cover 6 can be opened, and the die steel is removed from furnace body 1.

[0042] The specific operation of the tempering furnace for die steel in use process is as follows:

[0043] The furnace cover 6 and connecting column 3 are lifted by lifting equipment, and the connecting column 3 is removed from furnace body 1;

[0044] At this time, the matched die steel can be placed in each positioning hole 9, then the connecting column 3 is hoisted back into the furnace body 1 by hoisting equipment, the bottom end of the connecting column 3 is spline-connected in the connecting groove, the furnace cover 6 seals the top opening of the furnace body 1, and the furnace cover 6 can be locked by cooperating with the locking member;

[0045] The first adjusting valve 12 is opened, the second adjusting valve 14 is closed, the air heater 5 is started to introduce hot air into the furnace body 1, and the driver 7 is started to drive the support seat 2 to drive the connecting column 3 to rotate until the furnace body 1 reaches and maintains the preset tempering temperature to perform the tempering treatment;

[0046] After the tempering treatment is completed, the first adjusting valve 12 is closed, the second adjusting valve 14 is opened, and the air cooler 13 is started to introduce cold air into the furnace body 1 to perform cooling;

[0047] After the cooling is completed, the connecting column 3 is removed from the furnace body 1 by hoisting equipment, and then the die steel after tempering is removed from the positioning hole 9.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application. The modifications should be included in the scope of the claims of the present application.

Claims

1. A tempering furnace for die steel, characterized in that: include: A furnace body, wherein the top of the furnace body is open and is provided with a furnace cover for sealing the opening; A support base, which is driven by a driver to rotate and is arranged at the bottom of the furnace body and has a connecting groove on the top; A connecting column, the connecting column is vertically arranged in the furnace body and the top of the connecting column is rotatably connected to the furnace cover through a rotating connecting piece, and the bottom end of the connecting column is keyed into the connecting groove; A plurality of placement racks are arranged on the connecting column in a staggered manner from bottom to top, and each placement rack is provided with a plurality of positioning holes for placing the mold steel; An air heater, wherein a hot air outlet pipe of the air heater is connected to the bottom of the furnace body.

2. A tempering furnace for mold steel according to claim 1, characterized in that: Each of the positioning holes includes a plurality of cylindrical hole segments which are spaced apart from each other from top to bottom and have gradually decreasing diameters. Two adjacent cylindrical hole segments are connected by a gradual transition hole segment, and a limited shrinkage segment is formed at the bottom end of the cylindrical hole segment located at the bottom.

3. A tempering furnace for mold steel according to claim 1 or 2, characterized in that: Each of the placement racks is a grid.

4. The tempering furnace for mold steel according to claim 1, characterized in that: The rotating connecting member comprises: A fixed column, the fixed column is fixedly connected to the furnace cover and is rotatably connected to the top of the connecting column; The connecting sleeve is rotatably sleeved on the top side of the connecting column and partially slidably embedded in an annular groove opened on the top side of the connecting column along its circumferential direction. The connecting sleeve is fixedly connected to the furnace cover by multiple reinforcement strips.

5. The tempering furnace for mold steel according to claim 4, characterized in that: A plurality of reinforcement strips are circumferentially arranged outside the connecting sleeve.

6. The tempering furnace for mold steel according to claim 1, characterized in that: The bottom side of the furnace body is covered with an annular air distribution pipe, which is connected to the hot air outlet pipe. The side wall of the bottom side of the furnace body is provided with a plurality of air distribution holes connected to the annular air distribution pipe along its circumferential direction.

7. The tempering furnace for mold steel according to claim 6, characterized in that: The air outlet section of each of the air distribution holes is conical and arranged obliquely toward the upper inner side of the furnace body.

8. The tempering furnace for mold steel according to claim 6, characterized in that: The hot air outlet pipe is provided with a first regulating valve; An air cooler is provided outside the furnace body, a cold air outlet pipe of the air cooler is connected to the annular air distribution pipe, and a second regulating valve is provided on the cold air outlet pipe.

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